Method and apparatus for non-coherent communication

Abstract

The present application discloses a method and apparatus for non-coherent communication. A method for wireless communication at a transmitting device includes adding parity bits to an information bit set. The method also includes generating a non-coherent transmission signal by mapping the parity bits and the information bit set into a complex codeword sequence. In addition, the method may include transmitting the non-coherent transmission signal to a receiving device. A method for wireless communication at a receiving device includes receiving a non-coherent signal having at least one segment from a transmitting device. Each segment includes a complex codeword sequence corresponding to an information bit and a parity bit. The method also includes jointly detecting these sequences from each segment of the received non-coherent signal by using the parity bits.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Patent Application No. 17 / 166,993, filed on February 3, 2021, entitled “PARITY CHECK BITS for non-coherent communication,” which claims the benefit of U.S. Provisional Patent Application No. 62 / 970,131, filed on February 4, 2020, entitled “PARITY CHECK BITS for non-coherent communication,” the disclosures of which are expressly incorporated herein by reference in their entirety. background Technical Field

[0004] The present disclosure relates generally to communication systems and, more particularly, to non-coherent wireless communications.

[0005] introduction

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0008] Overview

[0009] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be presented later.

[0010] In some aspects of the present disclosure, a method for wireless communication at a transmitting device may include adding parity bits to a set of information bits. The method may also include generating a non-coherent transmission signal by mapping the parity bits and the set of information bits into a complex symbol sequence. In addition, the method may include transmitting the non-coherent transmission signal to a receiving device.

[0011] In some aspects, a method of performing wireless communication at a receiving device may include receiving a non-coherent signal having at least one segment from a transmitting device. Each segment includes a sequence of complex symbols corresponding to information bits and parity bits. The method may also include jointly detecting these sequences from each segment of the received non-coherent signal using the parity bits.

[0012] A transmitting device for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may add parity bits to an information bit set. The transmitting device may also generate a non-coherent transmission signal by mapping the parity bits and the information bit set into a complex symbol sequence. The transmitting device may also transmit the non-coherent transmission signal to a receiving device.

[0013] A receiving device for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may receive a non-coherent signal having at least one segment from a transmitting device. Each segment includes a complex symbol sequence corresponding to an information bit and a parity bit. The receiving device may also include jointly detecting these sequences from each segment of the received non-coherent signal using the parity bit.

[0014] A transmitting device for wireless communication may include a device for adding parity bits to an information bit set. The transmitting device may also include a device for generating a non-coherent transmission signal by mapping the parity bits and the information bit set into a complex codeword sequence. The transmitting device may also include a device for transmitting the non-coherent transmission signal to a receiving device.

[0015] A receiving device for wireless communication may include means for receiving a non-coherent signal having at least one segment from a transmitting device. Each segment may include a complex symbol sequence corresponding to information bits and parity bits. The receiving device may also include means for jointly detecting these sequences from each segment of the received non-coherent signal using the parity bits.

[0016] A non-transitory computer-readable medium may include a program code executed by a transmitting device. The medium may include a program code for adding parity bits to an information bit set. The medium may also include a program code for generating a non-coherent transmission signal by mapping the parity bits and the information bit set into a complex codeword sequence. The medium may also include a program code for transmitting the non-coherent transmission signal to a receiving device.

[0017] A non-transient computer-readable medium may include a program code executed by a receiving device. The medium may include a program code for receiving a non-coherent signal having at least one segment from a transmitting device. Each segment may also include a complex symbol sequence corresponding to an information bit and a parity bit. The medium may also include a program code for jointly detecting these sequences from each segment of the received non-coherent signal using the parity bit.

[0018] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the disclosed concepts in terms of both their organization and method of operation and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0021] Figure 2A , 2B , 2C, and 2D are diagrams illustrating examples of a first 5G / NR frame, a DL channel within a 5G / NR subframe, a second 5G / NR frame, and a UL channel within a 5G / NR subframe, respectively.

[0022] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0023] Figure 4 is a diagram illustrating an example of a coherent communication system.

[0024] Figure 5 is a diagram illustrating an example of a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0025] Figure 6 is a diagram illustrating an example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0026] Fig. 7A is a diagram illustrating another example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0027] Figure 7B is a diagram illustrating another example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0028] Figure 8 is a diagram illustrating an example of a receiver architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0029] Fig. 9 is a call flow diagram of signaling between a receiving device and a transmitting device according to certain aspects of the present invention.

[0030] Fig.10 is a flow chart of a wireless communication method.

[0031] Fig.11 is a conceptual data flow diagram illustrating the flow of data between different devices / components in an example apparatus.

[0032] Fig.12 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

[0033] Fig.13 is a flow chart of a wireless communication method.

[0034] Fig.14 is a conceptual data flow diagram illustrating the flow of data between different devices / components in an example apparatus.

[0035] Fig.15 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

[0036] Fig.16 is a diagram illustrating another example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0037] Fig.17 According to certain aspects of the present disclosure Fig.16 Schematic diagram of an example of a transmitter architecture for inserting parity bits.

[0038] Fig.18 is a flowchart of a wireless communication method, for example, for a transmitting device according to various aspects of the present disclosure.

[0039] Fig.19A is a diagram illustrating an example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0040] Fig.19B is a diagram illustrating an example of a receiver architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure.

[0041] Fig. 20 is a flow chart of a wireless communication method, for example, for a recipient device, according to various aspects of the present disclosure.

[0042] Detailed Description

[0043] Coherent communication systems may not perform well when the signal has a low signal-to-noise ratio (SNR). For example, at low SNR, the receiver increases the amount of energy allocated for pilot signal (e.g., demodulation reference signal (DMRS)) transmission to improve channel estimation. The pilot signal does not convey any useful information, so that the energy spent on transmitting the pilot signal does not send any useful information. In addition, at low SNR, the quality of the channel estimate may be poor. If the receiver cannot accurately estimate the channel, demodulation and decoding will be affected, which may result in performance loss.

[0044] UEs at the cell edge may operate at low SNRs. Coherent communication schemes utilizing pilots may not work effectively for such cell edge UEs. To overcome this problem or improve performance (e.g., at low SNRs), the present disclosure provides a non-coherent communication system.

[0045] In a coherent communication system, the receiver performs demodulation and decoding in a coherent manner, where the receiver estimates the channel of the received signal based on the pilot. In a non-coherent communication system, the transmitter does not transmit any pilot (such as DMRS), but instead transmits information directly to the receiver. The receiver then determines or decodes the information received from the transmitter without performing any channel estimation. Although the receiver does not explicitly perform any channel estimation, the channel estimation can be a by-product of the receiving algorithm after the receiver demodulates or decodes the information. In other words, after the receiver decodes and demodulates the signal, the receiver can obtain an estimate of the channel coefficients.

[0046] According to aspects of the present disclosure, parity bits are inserted into the information payload before the information payload is divided into groups and mapped to sequences for transmission to a receiver. The parity bits enable the receiver to jointly detect the groups of the information payload. The parity bits may be cyclic redundancy check (CRC) bits. In another option, the parity bits may be CRC bits plus additional parity bits. The receiver may determine a candidate list for each group in the received signal. The receiver selects a candidate that satisfies the parity check for each group.

[0047] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Specifically, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on this teaching, it should be appreciated by those skilled in the art that the scope of the present disclosure is intended to cover any aspect disclosed by the present disclosure, whether it is independently or in combination with any other aspect of the present disclosure. For example, any number of aspects described can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods that are practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure described. It should be understood that any aspect of the present disclosure disclosed can be implemented by one or more elements of the claims.

[0048] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0049] As an example, an element, or any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0050] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, each function may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media of the above types, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0051] Figure 1 1 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0052] Base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network 190 via a backhaul link 184. Base stations 102 may perform one or more of the following functions, among other functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. The base stations 102 may communicate with each other directly or indirectly (eg, through the EPC 160 or the core network 190) via a backhaul link 134 (eg, an X2 interface). The backhaul link 134 may be wired or wireless.

[0053] Base stations 102 may communicate wirelessly with UEs 104. Each base station 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may be over one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth. These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0054] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0055] The wireless communication system may further include a Wi-Fi access point (AP) 150 in communication with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available prior to communication.

[0056] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0057] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include an eNB, a gB node (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the radio frequency (RF) in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. The radio waves in this band may be referred to as millimeter waves. Near mmW can be extended down to 3 GHz frequencies with a wavelength of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, which is also referred to as centimeter waves. Communications using mmW / near mmW radio frequency bands (e.g., 3 GHz–300 GHz) have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0058] Base station 180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0059] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS related charging information.

[0060] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may be in communication with a unified data management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and the core network 190. In general, AMF 192 provides quality of service (QoS) flows and session management. All user Internet Protocol (IP) packets are delivered through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services.

[0061] A base station may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point to the EPC 160 or the core network 190 for the UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0062] Although the following description may focus on 5G NR, the concepts described may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0063] Figure 2A 200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G / NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G / NR frame structure. Figure 2D 280 is a diagram illustrating an example of an UL channel within a 5G / NR subframe. The 5G / NR frame structure can be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL; or can be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , 2CIn the example provided, the 5G / NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and X is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received slot format indicator (SFI). Note that the following description also applies to the 5G / NR frame structure for TDD.

[0064] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-S-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ of 0 to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on parameter design. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter design 0 to 5. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figure 2A-2D An example of slot configuration 0 with 14 symbols per slot and parameter design μ=0 is provided, with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is about 66.7 μs.

[0065] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also called a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0066] like Figure 2A As illustrated in FIG. 1 , some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) for channel estimation at the UE (indicated as R for one particular configuration). x , where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS). RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0067] Figure 2B An example of various DL channels within a subframe of an explanation frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE includes 9 RE groups (REGs), and each REG includes 4 consecutive REs in an OFDM symbol. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by the UE 104 to determine the subframe / symbol timing and the physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE may determine the physical cell identifier (PCI). Based on the PCI, the UE may determine the location of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth, as well as the system frame number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0068] like Figure 2CAs illustrated in , some REs carry DM-RSs for channel estimation at the base station (indicated as R for one particular configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. Although not shown, the UE may transmit a sounding reference signal (SRS). The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0069] Figure 2D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a location as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement / negative acknowledgement (ACK / NACK) feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0070] Figure 33 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0071] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time domain and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from reference signals and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0072] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0073] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher interpretation, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0074] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0075] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0076] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0077] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher decoding, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0078] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 Various aspects of the combination of the determination component 198 or the incoherent component 199.

[0079] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 Various aspects of the combination of the determination component 198 or the incoherent component 199.

[0080] Figure 4 4 is a diagram illustrating an example of a coherent communication system. In a wireless system based on coherent communication, a transmitter generates a signal by decoding and modulating the signal 402, and transmits data 404 and a pilot symbol 408 or a demodulation reference signal (DMRS) together with the data. The pilot symbol 408 can be inserted with the data 404 by inserting a pilot 406. The data 404 carries information that the transmitter wants to send to the receiver. The pilot symbol or DMRS 408 does not transmit information, but can be used by the receiver to perform channel estimation. The receiver uses the pilot symbol or DMRS 408 to estimate the channel 410, and then sends the channel estimation information 412 to the demodulator / decoder 414 to perform coherent demodulation and coherent decoding.

[0081] Coherent communication systems may not perform optimally at low signal-to-noise ratios (SNRs). For example, at low SNRs, a large amount of energy is used to transmit pilot symbols or DMRSs in order for the receiver to correctly estimate the channel. Since the pilot / DMRS does not convey any useful information, the energy consumed in transmitting the pilot does not contribute to any useful information. This may result in energy loss per bit. In addition, at low SNRs, the quality of channel estimation may be poor. If the receiver cannot accurately estimate the channel, demodulation and decoding will be affected, which may result in a sharp performance loss.

[0082] UEs at the cell edge may operate at low SNR, and coherent communication schemes utilizing pilot / DMRS may not work effectively for such cell edge UEs. To overcome this problem or to improve performance (eg, at low SNR), the present disclosure provides a non-coherent communication system.

[0083] In a coherent communication system, the receiver may be configured to perform demodulation and decoding in a coherent manner, wherein the receiver estimates the channel of the received signal based on the pilot / DMRS. In a non-coherent communication system, the transmitter does not transmit any pilot / DMRS, but instead transmits information directly to the receiver.

[0084] Figure 5 5 is a diagram illustrating an example of a non-coherent communication system. The transmitter will generate a non-coherent transmission signal by performing decoding / modulation 502, and then transmit data 504 to the receiver. The receiver then determines or decodes the information received from the transmitter at demodulation / decoding 508 without performing a channel estimation procedure. Although the receiver does not explicitly perform channel estimation, after the receiver demodulates or decodes the information 508, the channel estimate can be determined by the channel 506 as a by-product of the receiving algorithm. In other words, after the receiver decodes and demodulates the signal, the receiver can obtain an estimate of the channel coefficients.

[0085] Figure 6600 is a diagram illustrating an example of a transmitter architecture for a non-coherent communication system. The diagram 600 of the transmitter architecture includes channel decoding 602, bit-to-sequence mapping 604, and CP-OFDM or DFT-S-OFDM 606 waveform generation. On the transmitter side, the transmitter first encodes information bits 608 into a decoded bit stream 610 at a channel decoding block 602. The channel decoding block 602 may include adding error detection codes (e.g., cyclic redundancy check (CRC)), channel decoding using low-density parity check (LDPC) codes, polar codes, or other block codes (such as but not limited to Reed-Muller codes, etc.), interleaving, and / or rate matching. The addition of error detection, channel decoding, interleaving, and / or rate matching may be collectively referred to as a channel decoding block 602, which may be configured to convert undecoded information bits into decoded bits before modulation as channel decoding. In some aspects, if the payload size (e.g., number of information bits) is very small (e.g., 20 bits, 40 bits, 48 ​​bits, etc.), the channel decoding block 602 may not be utilized. In such aspects, the transmitting device may be configured to directly map the information bits into the sequence. The transmitter may also be configured to concatenate and / or superimpose these sequences to generate a non-coherent signal (e.g., as discussed below). In the disclosed aspects, a list of very small payload sizes is provided as an example, and the disclosure is not intended to be limited to such examples of payload sizes. Other payload sizes greater or less than the provided examples may also allow for not utilizing the channel decoding block 602 so that the transmitting device can directly map the information bits into the sequence.

[0086] The transmitter then maps the subset of the bit sequence into a sequence 612 at the bit-to-sequence mapping block 604. The non-coherent sequence mapping may map each subset of k coded bits into a sequence of n complex symbols. For example, if the number of coded bits is kM, the transmitter may divide the coded bits into M groups, where each group has k bits. The transmitter may then map each group of k bits into a sequence of length n. In some aspects, the sequence may be mapped from a base of 2. k The transmitter may then concatenate the sequences 612 together to form a transmit signal of length nM, which differs from conventional modulation (e.g., as used in LTE or NR), where each tuple of coded bits may be mapped to a single complex symbol (e.g., 2 bits in QPSK, 4 bits in 16QAM, 6 bits in 64QAM, etc.). For example, Figure 6 , after channel decoding, a group of k bits a0,...,a k-1 The bits x0,...x are mapped to a sequence of length n n-1 After channel decoding, another group of k bits a k,...,a 2k-1 is mapped to x n ,...x 2n-1 These sequences are then concatenated to form the concatenated sequence x0,...x nM-1 .

[0087] In some aspects, the bit-to-sequence mapping 604 may be configured to map the groups to two sequences based on a comparison between the groups. For example, in an instance where two k-bit groups differ in fewer bits, the bit-to-sequence mapping 604 may map the two k-bits to two sequences with greater mutual correlation, e.g., (0,0,0,0) versus (0,0,0,1). In an instance where two k-bit groups differ in more bits, the bit-to-sequence mapping 604 may map the two k-bit groups to two sequences with less mutual correlation, e.g., (0,0,0,0) versus (0,0,0,0).

[0088] Channel decoding block 602 may be configured to include all decoding related procedures, such as, but not limited to, CRC insertion, channel decoding, rate matching, interleaving, and / or scrambling.

[0089] Fig. 7A 700 is a diagram illustrating an example of a transmitter architecture for a non-coherent communication system. In some aspects, in order to support larger payload sizes, the transmitting device may be configured to stack multiple sequences together. For example, the transmitting device takes L(k-log2L) bits as input, where L is a positive integer (e.g., a power of 2), and splits or divides the bits into L groups at block 704, where each group includes k-log2L bits. In some aspects, the bits of the L groups may include decoded bits or undecoded bits (e.g., informative bits or information bits). In some aspects, for group i∈{0,…,L-1}, the transmitting device may add a group identifier to each bit group to form a string of L bits of length k. For example, the transmitting device may add a prefix or suffix of log2L bits to the bit group at block 704 to form a k-bit string a. (i) (e.g., 712, 714, 716). The transmitting device may be configured to add a group identifier to the bit group, and is not intended to be limited to the disclosed aspects. The transmitting device may (e.g., at 706, 708, 710) add each bit string a (i) (e.g., 712, 714, 716) is mapped to a sequence x of length n (i) (For example, 718, 720, 722). The transmitting device may then superimpose the L sequences to generate a sequence y of length n based on the following formula: l 724:

[0090]

[0091] Figure 7B 750 is a diagram illustrating another example of a transmitter architecture for a non-coherent communication system. In some aspects, a transmitter device may be configured to use different sequence sets to map different groups of bits into sequences. For example, block 754 may receive Lk bits 752 and segment or divide the bits to form a k-bit string a. (i) (e.g., 762, 764, 766). However, block 754 is not as described above. Fig. 7A Specifically, the transmitting device may be configured (e.g., at 756, 758, 760) to map different bit groups into sequences using different sequence sets, respectively. The transmitting device may (e.g., at 756, 758, 760) map each bit string a to a group identifier. (i) (e.g., 762, 764, 766) is mapped to a sequence x of length n (i) (e.g., 768, 770, 772). For example, one may use (0) The first bit group a0 (0) ,…,a k-1 (0) Mapping to x0 (0) ,…,x n-1 (0) . You can use the sequence from the sequence set C (2) The sequence will be the second bit group a0 (2) ,…,a k-1 (2) Mapping to x0 (2) ,…,x n-1 (2) . You can use the sequence from the sequence set C (L-1) The sequence will be L bit group a0 (L -1) ,…,a k-1 (L-1) Mapping to x0 (L-1) ,…,x n-1 (L-1) In such aspects, the group identifier may be implicitly communicated through the sequence set. The transmitting device may then transmit the sequence y similarly to the sequence y discussed above. l 724 way to stack L sequences to generate a sequence y of length n l 774.

[0092] Figure 88 is a diagram illustrating an example of a receiver architecture for a non-coherent communication system. The diagram 800 of the receiver architecture includes an OFDM / DFT-S-OFDM demodulation block 804, a non-coherent soft demodulation block 806, and a channel decoding block 808. For each signal y∈C received on each receive antenna n , the receiving device may first divide the received signal into M subgroups of length n. Each received signal group may correspond to a sequence. In some aspects, each received signal group may correspond to L superimposed sequences. In some aspects, for example, when superposition does not occur, the receiver may determine 2 k The score s of each candidate sequence in the sequence set C is j . Candidate sequence c j Scores j Based on the received signal y and the candidate sequence c j The receiving device can use the score s j To determine the log-likelihood ratio (LLR) of each of the k bits. In some aspects, the receiving device may calculate the LLR of a particular bit as follows:

[0093]

[0094] J:c j The i-th bit of 0 refers to the sum of all sequences indexed j where the i-th bit of sequence cj is equal to 0. For example, in an aspect where k=3 and i=0, then the sequence corresponding to the following bits makes the i-th bit zero as shown below.

[0095] 000 001 010 011

[0096] In another example, where k=3 and i=1, the i-th bit of the sequence corresponding to the following bit string is equal to 1, as shown below.

[0097] 100 101 110 111

[0098] Thus, in this example, the LLR may be based on the difference between the sum of scores for particular bits having a value of 0 and the sum of scores for particular bits having a value of 1.

[0099] In some aspects, the receiving device may calculate the LLR for a particular bit as follows:

[0100] LLR(a i )=max{s j :j:c j The i-th bit is 0}-max{s j :j:c j The i-th bit of

[0101] where max{s j:j:c j The i-th bit is 0}, indicating c j The score value s of the i-th bit j is equal to 0, and then the maximum value of all score values ​​is calculated to determine the first term in the formula, and where max{s j :j:c j The i-th bit is 1}, indicating c j The score value s of the i-th bit j is equal to 1, and then the minimum value of all score values ​​is calculated to determine the second term in the formula.

[0102] Thus, in this example, the LLR may be based on the difference between the maximum score for a particular bit having a value of 0 and the maximum score for a particular bit having a value of 1.

[0103] Fig. 9 An example communication flow 900 between a receiving device 902 and a transmitting device 904 is illustrated. The receiving device 902 may correspond to a UE, and the transmitting device 904 may correspond to a base station. Figure 1 In the context of , the transmitting device 904 may correspond to the base station 102 / 180, and accordingly, the cellular cell may include a geographic coverage area 110 in which communication coverage is provided and / or a small cellular cell 102' having a coverage area 110'. In addition, the receiving device 902 may correspond to at least the UE 104. In another example, in Figure 3 In the context of , the transmitting device 904 may correspond to the base station 310 and the receiving device 902 may correspond to the UE 350. In still other aspects, the receiving device 902 may correspond to a base station and the transmitting device 904 may correspond to a UE.

[0104] In box 906, the transmitter device 904 can generate a non-coherent transmission signal, including mapping a bit subset to a complex symbol sequence. In some aspects, the bit subset may include a decoded bit subset. The decoded bit can be generated from an LDPC code or a polar code. In some aspects, in order to generate a non-coherent transmission signal, the transmitter device 904 can map one or more decoded bit subsets to a corresponding complex symbol sequence. Each group can be mapped to a corresponding sequence of length n in a plurality of sequences. A plurality of sequences can be cascaded to form a non-coherent transmission signal. In some aspects, if two k-bit groups are different in fewer bits, the two k-bit groups can be mapped to two sequences with a larger mutual correlation. In some aspects, if two k-bit groups are different in more bits, the two k-bit groups can be mapped to two sequences with a smaller mutual correlation.

[0105] In some aspects, in order to generate a non-coherent transmission signal, the transmitter device 904 may add identification information to each group in the M bit groups to form M bit strings. Bit subsets may be divided into groups. In some aspects, in order to add identification information, the transmitter device 904 may retain one or more of the k bits to include identification information. In some aspects, in order to add identification information, the transmitter device 904 may add a prefix or suffix including identification information to each group in the M bit groups to form M bit strings. In some aspects, in order to generate a non-coherent transmission signal, the transmitter device 904 may map each of the M bit strings to a corresponding sequence of length n. In some aspects, in order to generate a non-coherent transmission signal, the transmitter device 904 may superimpose each of the corresponding sequences of length n to generate a superimposed sequence of length n. The identification information may indicate the identity of each group in the M groups involved in the sequence superposition.

[0106] Upon generating the non-coherent transmission signal, the transmitting device 904 may transmit the non-coherent transmission signal 908 to the receiving device 902. The receiving device 902 receives the non-coherent transmission signal 908 having data from the transmitting device 904.

[0107] At block 910, the recipient device 902 may determine data from the received signal 908 without performing channel estimation.

[0108] In some aspects, the receiving device 902 may perform OFDM demodulation on the received signal, for example at block 912. The receiving device 902 may perform OFDM demodulation to determine data from the received signal. In some aspects, the receiving device 902 may perform OFDM demodulation before performing non-coherent soft demodulation.

[0109] In some aspects, for example, at block 914, the receiving device 902 may perform non-coherent soft demodulation on the received signal. The receiving device 902 may perform non-coherent soft demodulation to determine data from the received signal. In some aspects, the receiving device 902 may determine a log likelihood ratio (LLR) for each bit of the received signal. In some aspects, to perform non-coherent soft demodulation, the receiving device 902 may divide the received signal into M subgroups of length n. Each group of the received signal may correspond to a candidate sequence. When performing non-coherent soft demodulation, the receiving device 902 may determine a score s for each candidate sequence. j In some aspects, the LLR for the bits may be based on a first sum of scores for bits based on a first value minus a second sum for bits having a second value. In some aspects, the LLR for the bits may be based on a first maximum score for bits based on the first value minus a second maximum score for bits having the second value. In some aspects, the score may be based on a cross-correlation between the received signal and the candidate sequence.

[0110] In some aspects, for example, at block 916, the receiving device 902 may perform channel decoding on the received signal. The receiving device 902 may perform channel decoding to determine data from the received signal. In some aspects, the receiving device 902 may perform channel decoding after performing non-coherent soft demodulation on the received signal. In some aspects, the output of the channel decoding may be submitted back to the non-coherent soft demodulation to perform an iterative demodulation and decoding procedure, such as Figure 8 As described in 808.

[0111] Fig.10 1 is a flow chart of a wireless communication method 1000. The method may be performed by a receiving device (e.g., receiving device 902; equipment 1102 / 1102'; processing system 1214). The method may be performed by a transmitting device (e.g., transmitting device 904; equipment 1402 / 1402'; processing system 1514). In some aspects, the receiving device may include a UE or a component of a UE so that the method may be performed by a UE or a component of a UE (e.g., UE 104, 350; equipment 1102 / 1102'; processing system 1214, which may include memory 360, and may be the entire UE 350 or a component of the UE 350, such as TX processor 368, RX processor 356 and / or controller / processor 359). In some aspects, the receiving device may include a base station or a component of a base station, such that the method may be performed by a base station or a component of a base station (e.g., base station 102, 180, 310; equipment 1402 / 1402'; processing system 1214, which may include memory 376 and may be the entire base station 310 or a component of the base station 310, such as TX processor 316, RX processor 370 and / or controller / processor 375). According to various aspects, one or more of the illustrated operations of method 1000 may be omitted, transposed, and / or performed concurrently. Optional aspects are illustrated with dashed lines. The method may allow a receiving device (e.g., UE or base station) to operate in a non-coherent communication scheme and determine information from a received signal without performing channel estimation.

[0112] In block 1002, a receiving device may receive a non-coherent signal having data. For example, block 1002 may be performed by a non-coherent component 1106 of an equipment 1102. The receiving device may receive a non-coherent signal from a transmitting device. In some aspects, the receiving device may be a UE and the transmitting device may be a base station. In some aspects, the receiving device may be a base station and the transmitting device may be a UE.

[0113] At block 1004, the receiving device may determine data from the received signal without performing channel estimation. For example, block 1004 may be performed by a determining component 1108 of the apparatus 1102.

[0114] In some aspects, for example, at block 1006, the receiving device may perform OFDM demodulation on the received signal. For example, block 1006 may be performed by OFDM demodulation component 1110 of equipment 1102. The receiving device may perform OFDM demodulation on the received signal to determine data from the received signal. In some aspects, the receiving device may perform OFDM demodulation on the received signal before performing non-coherent soft demodulation.

[0115] In some aspects, the receiving device may perform non-coherent soft demodulation on the received signal, for example at block 1008. For example, block 1008 may be performed by a soft demodulation component 1112 of the equipment 1112. The receiving device may perform non-coherent soft demodulation on the received signal to determine data from the received signal.

[0116] In some aspects, the receiving device may determine an LLR for each bit of the received signal, for example at block 1010. For example, block 1010 may be performed by an LLR component 1114 of the apparatus 1102. The receiving device may determine an LLR for each bit of the received signal to perform non-coherent soft demodulation on the received signal.

[0117] In some aspects, to perform non-coherent soft demodulation, the receiving device may divide the received signal into M subgroups of length n, such as at block 1012. For example, block 1012 may be performed by a dividing component 1116 of the apparatus 1102. In some aspects, each group of the received signal may correspond to a candidate sequence.

[0118] In some aspects, for example at block 1014, to perform non-coherent soft demodulation, the receiving device may determine a score s for each candidate sequence. j . For example, block 1014 may be performed by a scoring component 1118 of the apparatus 1102. In some aspects, the LLR for a bit may be based on a first sum of scores for the bit being a first value minus a second sum of scores for the bit being a second value. In some aspects, the LLR for a bit may be based on a first maximum score for the bit being the first value minus a second maximum score for the bit being the second value. In some aspects, the score may be based on a cross-correlation between the received signal and the candidate sequence.

[0119] In some aspects, for example, at block 1016, the receiving device may perform channel decoding on the received signal. For example, block 1016 may be performed by a channel decoding component 1120 of the equipment 1102. In some aspects, the receiving device may perform channel decoding after performing non-coherent soft demodulation on the received signal. In some aspects, the output of the channel decoding may be submitted back to the non-coherent soft demodulation to perform an iterative demodulation and decoding procedure.

[0120] Fig.111100 is a conceptual data flow diagram illustrating data flow between different devices / components in an example apparatus 1102. The apparatus may be a receiving device. In some aspects, the apparatus may include a UE or a component of a UE. In some aspects, the apparatus may include a base station or a component of a base station. The apparatus includes a receiving component 1104, which may be configured to receive various types of signals / messages and / or other information from other devices (including, for example, a transmitting device 1150). The apparatus includes a non-coherent component 1106, which may receive a non-coherent signal having data, such as, for example, a transmission signal. Fig.10 1002 as described. The apparatus includes a determining component 1108, which can determine data from the received signal without performing channel estimation, for example, as combined Fig.10 The apparatus includes a soft demodulation component 1110, which can perform non-coherent soft demodulation on the received signal, for example, as combined with Fig.10 The apparatus includes an OFDM demodulation component 1112, which can perform OFDM demodulation on the received signal, for example, as combined with Fig.10 The apparatus includes an LLR component 1114 that can determine the LLR of each bit of the received signal, for example, as combined with Fig.10 The apparatus includes a partitioning component 1116, which can partition the received signal into M subgroups of length n, for example, as combined with Fig.10 The apparatus includes a scoring component 1118 that can determine a score s for each candidate sequence. j , for example, as combined Fig.10 The apparatus includes a channel decoding component 1120, which can perform channel decoding on the received signal, for example, as combined with Fig.10 1016. The apparatus includes a transmission component 1122, which can be configured to transmit various types of signals / messages and / or other information to other devices (including, for example, a transmitting device 1150).

[0121] The equipment may include performing Fig.10 The additional components of each box of the algorithm in the preceding flowchart. Thus, Fig.10 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0122] Fig.121200 is a diagram illustrating an example of a hardware implementation of an apparatus 1102' employing a processing system 1214. The processing system 1214 may be implemented with a bus architecture generally represented by a bus 1224. Depending on the specific application of the processing system 1214 and the overall design constraints, the bus 1224 may include any number of interconnecting buses and bridges. The bus 1224 links together various circuits, including one or more processors and / or hardware components (represented by the processor 1204, components 1104, 1106, 1108, 1110, 1112, 1114, 1116, 1118, 1120, 1122, and computer readable medium / memory 1206). The bus 1224 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0123] The processing system 1214 may be coupled to the transceiver 1210. The transceiver 1210 is coupled to one or more antennas 1220. The transceiver 1210 provides a means for communicating with various other equipment via a transmission medium. The transceiver 1210 receives signals from the one or more antennas 1220, extracts information from the received signals, and provides the extracted information to the processing system 1214 (specifically, the receiving component 1104). In addition, the transceiver 1210 receives information from the processing system 1214 (specifically, the transmission component 1122) and generates signals to be applied to the one or more antennas 1220 based on the received information. The processing system 1214 includes a processor 1204 coupled to a computer-readable medium / memory 1206. The processor 1204 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1206. The software, when executed by the processor 1204, causes the processing system 1214 to perform the various functions described above for any particular equipment. The computer-readable medium / memory 1206 may also be used to store data manipulated by the processor 1204 when executing software. The processing system 1214 further includes at least one of the components 1104, 1106, 1108, 1110, 1112, 1114, 1116, 1118, 1120, 1122. These components may be software components running in the processor 1204, software components resident / stored in the computer-readable medium / memory 1206, one or more hardware components coupled to the processor 1204, or some combination thereof. The processing system 1214 may be a component of the base station 310 and may include the memory 376 and / or at least one of the following: the TX processor 316, the RX processor 370, and the controller / processor 375. Alternatively, the processing system 1214 may be the entire base station (e.g., see Figure 3310). The processing system 1214 may be a component of the UE 350 and may include the memory 360 and / or at least one of the following: the TX processor 368, the RX processor 356, and the controller / processor 359. Alternatively, the processing system 1214 may be the entire UE (e.g., see Figure 3 of 350).

[0124] In one configuration, the equipment 310, 350 for wireless communication includes a device for adding parity bits to the information bit set. The equipment may also include a device for generating a non-coherent transmission signal. The equipment may also include a device for transmitting a non-coherent transmission signal to a receiving device. The equipment may have a device for receiving a non-coherent signal having at least one segment from a transmitting device. The equipment may include a device for receiving a complex symbol sequence corresponding to the information bit and the parity bit, and a device for jointly detecting these sequences. The aforementioned device may be one or more of the aforementioned components in the device 310 / 350 configured to perform the functions described by the aforementioned device.

[0125] Fig.13 1 is a flow chart of a wireless communication method 1300. The method may be performed by a transmitting device (e.g., transmitting device 904; equipment 1402 / 1402'; processing system 1514). The method may be performed by a receiving device (e.g., transmitting device 904; equipment 1402 / 1402'; processing system 1514). In some aspects, the transmitting device may include a UE or a component of a UE so that the method may be performed by a UE or a component of a UE (e.g., UE 104, 350; equipment 1102 / 1102'; processing system 1214, which may include memory 360, and may be the entire UE 350 or a component of the UE 350, such as TX processor 368, RX processor 356 and / or controller / processor 359). In some aspects, the transmitting device may include a base station or a component of a base station, so that the method may be performed by a base station or a component of a base station (e.g., base station 102, 180, 310; equipment 1402 / 1402'; processing system 1214, which may include memory 376 and may be the entire base station 310 or a component of the base station 310, such as TX processor 316, RX processor 370 and / or controller / processor 375). According to various aspects, one or more of the illustrated operations of method 1300 may be omitted, transposed, and / or performed concurrently. Optional aspects are illustrated with dashed lines. The method may allow a transmitting device (e.g., a base station or UE) to operate in a non-coherent communication scheme and transmit a transmission signal without transmitting any pilot signal or DMRS.

[0126] In block 1302, a transmitting device may generate a non-coherent transmission signal. For example, 1302 may be performed by a generating component 1406 of an apparatus 1402. The transmitting device may include mapping a subset of bits into a sequence of complex symbols in the non-coherent transmission signal. In some aspects, the subset of bits may include a subset of decoded bits. The decoded bits may be generated from an LDPC code or a polar code.

[0127] In some aspects, for example, in block 1304, in order to generate a non-coherent transmission signal, the transmitting device may map one or more bit subsets to one or more corresponding complex signal sequences. For example, 1304 may be performed by a mapping component 1408 of equipment 1402. In some aspects, each sequence in one or more sequences includes n complex symbols. In some aspects, each group may be mapped to a corresponding sequence of length n in a plurality of sequences. In some aspects, one or more sequences may be cascaded to form a non-coherent transmission signal. In some aspects, mapping a bit subset to a complex symbol sequence may determine whether two k-bit groups are different in fewer bits, so that the two k-bit groups may be mapped to two sequences with greater mutual correlation. In other aspects, mapping a bit subset to a complex symbol sequence may determine whether two k-bit groups are different in more bits, so that the two k-bit groups may be mapped to two sequences with less mutual correlation.

[0128] In some aspects, in order to generate a non-coherent transmission signal, the transmitting device may divide one or more bit subsets into M bit groups to form M bit strings. The transmitting device may map each of the M bit strings to a corresponding sequence based on a corresponding sequence set of length n. The transmitting device may superimpose each sequence of the corresponding sequences of length n to generate a superimposed sequence of length n.

[0129] In some aspects, for example, at block 1306, to generate a non-coherent transmission signal, the transmitting device may add identification information to each of the M bit groups to form M bit strings. For example, 1306 may be performed by an identification component 1410 of the equipment 1402. In some aspects, the bit subsets may be divided into groups. The identification information may indicate the identity of each of the M groups involved in the superposition.

[0130] In some aspects, to add the identification information, the transmitting device may reserve one or more of the k bits to include the identification information, such as at block 1308. For example, 1308 may be performed by a reserving component 1412 of the apparatus 1402.

[0131] In some aspects, for example, at block 1310 , to add identification information, the transmitting device may add a prefix or suffix including identification information to each of the M bit groups to form M bit strings. For example, block 1310 may be performed by the adding component 1414 of the apparatus 1402 .

[0132] In some aspects, for example, at block 1312 , to generate a non-coherent transmission signal, the transmitting device may map each of the M bit strings into a corresponding sequence of length n. For example, 1312 may be performed by a sequence component 1416 of the apparatus 1402 .

[0133] In some aspects, for example, at block 1314 , to generate a non-coherent transmission signal, the transmitting device may superimpose each of the respective sequences of length n to generate a superimposed sequence of length n. For example, 1314 may be performed by a superposition component 1418 of the apparatus 1402 .

[0134] At block 1316 , the transmitting device may transmit a non-coherent transmission signal to the receiving device. For example, 1316 may be performed by the non-coherent component 1420 of the apparatus 1402 .

[0135] Fig.14 1400 is a conceptual data flow diagram illustrating data flow between different devices / components in an example apparatus 1402. The apparatus may be a transmitting device. In some aspects, the apparatus may include a UE or a component of a UE. In some aspects, the apparatus may include a base station or a component of a base station. The apparatus includes a receiving component 1404, which may be configured to receive various types of signals / messages and / or other information from other devices (including, for example, a receiving device 1450). The apparatus includes a generating component 1406, which may generate a non-coherent transmission signal, for example, as combined with Fig.13 The apparatus includes a mapping component 1408, which can map one or more bit subsets to corresponding one or more sequences, for example, as combined with Fig.13 The apparatus includes an identification component 1410, which can add identification information to each of the M bit groups to form M bit strings, for example, as combined with Fig.13 The apparatus includes a reservation component 1412 that can reserve one or more of the k bits to include identification information, for example, as combined with Fig.13 The apparatus includes an adding component 1414, which can add a prefix or suffix including identification information to each of the M bit groups to form M bit strings, for example, as combined Fig.13 The apparatus includes a sequence component 1416 that can map each of the M bit strings to a corresponding sequence of length n, for example, as combined with Fig.13 The apparatus includes a superposition component 1418 that can superimpose each of the corresponding sequences of length n to generate a superimposed sequence of length n, for example, as combined with Fig.13The apparatus includes a non-coherent component 1420, which can transmit a non-coherent transmission signal to a receiving device, for example, as combined with Fig.13 1316. The apparatus includes a transmission component 1422, which can be configured to transmit various types of signals / messages and / or other information to other devices (including, for example, a recipient device 1450).

[0136] The equipment may include performing Fig.13 The additional components of each box of the algorithm in the preceding flowchart. Thus, Fig.13 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0137] Fig.15 1500 is a diagram illustrating an example of a hardware implementation of an apparatus 1402' employing a processing system 1514. The processing system 1514 may be implemented with a bus architecture generally represented by a bus 1524. Depending on the specific application of the processing system 1514 and the overall design constraints, the bus 1524 may include any number of interconnecting buses and bridges. The bus 1524 links together various circuits, including one or more processors and / or hardware components (represented by the processor 1504, components 1404, 1406, 1408, 1410, 1412, 1414, 1416, 1418, 1420, 1422, and computer readable medium / memory 1506). The bus 1524 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0138] The processing system 1514 may be coupled to the transceiver 1510. The transceiver 1510 is coupled to one or more antennas 1520. The transceiver 1510 provides a means for communicating with various other equipment via a transmission medium. The transceiver 1510 receives signals from the one or more antennas 1520, extracts information from the received signals, and provides the extracted information to the processing system 1514 (specifically, the receiving component 1404). In addition, the transceiver 1510 receives information from the processing system 1514 (specifically, the transmission component 1422) and generates signals to be applied to the one or more antennas 1520 based on the received information. The processing system 1514 includes a processor 1505 coupled to a computer-readable medium / memory 1506. The processor 1504 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1506. The software, when executed by the processor 1504, causes the processing system 1514 to perform the various functions described above for any particular equipment. The computer-readable medium / memory 1506 may also be used to store data manipulated by the processor 1504 when executing software. The processing system 1514 further includes at least one of the components 1404, 1406, 1408, 1410, 1412, 1414, 1416, 1418, 1420, 1422. These components may be software components running in the processor 1504, software components resident / stored in the computer-readable medium / memory 1506, one or more hardware components coupled to the processor 1504, or some combination thereof. The processing system 1514 may be a component of the base station 310 and may include the memory 376 and / or at least one of the following: the TX processor 316, the RX processor 370, and the controller / processor 375. Alternatively, the processing system 1514 may be the entire base station (e.g., see Figure 3 310). The processing system 1514 may be a component of the UE 350 and may include the memory 360 and / or at least one of the following: the TX processor 368, the RX processor 356, and the controller / processor 359. Alternatively, the processing system 1514 may be the entire UE (e.g., see Figure 3 of 350).

[0139] When groups of information bits are segmented and mapped to separate sequences, the reliability of the overall payload may depend on the reliability of each segment. Thus, if any segment is not successfully decoded, the receiver may not be able to decode the entire payload, resulting in a higher probability of communication errors. Channel decoding components (such as LDPC / polar codes or Reed-Muller codes) can reduce the probability of communication errors by jointly protecting the segments of the information payload, as described in detail in relation to Figure 6However, in order to fully realize the channel decoding gain using conventional channel decoding schemes, the receiver may be too complex to implement.

[0140] According to aspects of the present disclosure, parity bits are inserted instead of performing the more complex channel decoding described previously. Together with the list decoder (explained later), the proposed scheme will have a better trade-off between communication reliability and receiver complexity. Now refer to Figure 16-20 to describe such improvements.

[0141] Fig.16 is a diagram illustrating another example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure. Fig.16 The transmitter 1600 shown in FIG. 1 is similar to Fig. 7A . However, Fig.16 The transmitter 1600 inserts parity bits into the information bit group at block 1610 before dividing the bits and adding the group identifier at block 704. By inserting the parity bits, the performance of the transmitter 1600 does not degrade as the payload size increases. Fig.16 The sequence is shown superimposed at element 1690, where y l =∑ i∈(0,…,L-1) xi (i) ,l=0,…,n-1, but cascades are also possible, where [y0,…,y nL-1 ]=[x0 (0) ,…x n -1 (0) ,…,x0 (1) ,…,x n-1 (1) ,…,x0 (L -1) ,…,x n-1 (L-1) ], where L is the number of sequences.

[0142] Fig.17 According to certain aspects of the present disclosure Fig.16 Figure 2 is a diagram of an example of inserting parity bits in a transmitter architecture of FIG. Fig.17 , box 1710 is from Fig.16 An example of block 1610 of FIG. Fig.17 In block 1710, a number of parity check bits A are inserted. In this example, the inserted bits are CRC bits. A number (k) of information bits a are included in the information payload. That is, the information bit set a includes information bits a0, ..., a k-1 After processing at block 1710, the output set b includes bits [b o ,…bk-1 , b k , …, b k+A-1 , where

[0143] In this case, the parameter f j represents the j-th CRC bit, where j = i - k + 1. For example, when 11 < k < 19 bits, 7 to 9 CRC bits can be used. In this example, the transmitter generates CRC bits from a primitive polynomial in the binary field GF(2 A )(in other words, a finite field of 2 A elements). For example, when A = 9, either of the following two polynomials can be used: g crc,9 (D) = D 9 + D 8 + D 6 + D 5 + 1 or g crc,9 (D) = D 9 + D 5 + 1, where the polynomial function g(D) represents the CRC function. The encoding by CRC can be calculated by dividing the polynomial formed by the data payload by the CRC polynomial g(D).

[0144] As Fig.16 shown, the transmitter 1600 can add parity bits to the information bit set (block 1610) before non-coherent transmission. Fig.17 Illustrates an option of inserting CRC bits as parity bits. In another option, the transmitter 1600 inserts CRC bits together with additional parity bits. In this option, the CRC bits can be generated as defined by the current New Radio (NR) specification. Additional details of this option are provided later in this specification.

[0145] Fig.18 is a flowchart of a wireless communication method for a transmitting device, for example, according to various aspects of the present disclosure. Fig.18 Shows method 1800, which may include adding parity bits to the information bit set before non-coherent transmission (block 1820). The UE 350 or the base station 310 (using, for example, the controller / processor 375, 359 and the memories 376, 360) inserts the parity bits into the information payload before bit partitioning and sequence mapping.

[0146] In some aspects, method 1800 may include generating a non-coherent transmission signal by mapping a set of parity bits and information bits to a sequence of complex symbols (block 1840). For example, UE 350 or base station 310 (using, for example, controller / processor 375, 359 and memory 376, 360) maps the bits to the sequence. Optionally, the UE may superimpose the sequences into a signal of length n, or concatenate L sequences into a signal of length n*L. If concatenation occurs, the group identifier may be omitted.

[0147] In some aspects, method 1800 may include transmitting a non-coherent transmission signal to a receiving device (block 1860). For example, UE 350 or base station 310 (using antennas 352, 320, modulators 354, 318, transmit processors 368, 316, controllers / processors 359, 375, and memory 360, 376) transmits the signal.

[0148] The information bits may be an uplink control information (UCI) payload transmitted on a physical uplink control channel (PUCCH). In this case, this technique enhances cell coverage for cell edge UEs. In this PUCCH example, the transmitter is a UE and the receiver is a base station. Both the transmitter and the receiver determine the number of segments and also determine the number of parity bits based on the payload size. If the parity bits are cyclic redundancy check (CRC) bits and if the payload is an uplink control information (UCI) payload of 11 bits or less, no parity bits are added and no segmentation occurs. If the payload is between 12 and 19 bits, two segments are used and 7 to 9 CRC bits are inserted. If the number of UCI bits is greater than or equal to 20, more than two segments are used and 16 CRC bits are inserted.

[0149] If the parity bits are CRC bits plus additional parity bits, the additional parity bits are based on a binary function of the information bits and / or the CRC bits.The parity function should incorporate information bits / CRC bits from at least two different groups.

[0150] According to various aspects of the present disclosure, both the transmitter and the receiver determine the number of segments based on the UCI payload size and also determine the number of parity bits. If the UCI payload is between 12 and 19 bits, two segments are created and six CRC bits and one to three additional parity bits are provided. The number of additional parity bits may depend on whether there are an even or odd number of bits in the UCI payload. If there is an odd number, one or three additional bits are inserted. Otherwise, two additional parity bits are provided. Thus, in both cases, an even number of information bits plus parity bits are generated, allowing equal division into two subsets / segments. If the number of UCI bits is 20 or more, 11 CRC bits and 4 additional bits are inserted. Similar to the two-segment case (k=2) discussed above, if there are more than two segments (k>2), the number of additional parity bits can be determined so that the total number of information bits plus parity bits (including CRC bits) is a multiple of the number of segments k, thereby allowing equal division into k subsets / segments.

[0151] For example, in 5G NR or another radio access technology (RAT), in addition to UCI transmitted in PUCCH, the payload may also be sidelink control information (SCI) or feedback transmission, or a discovery signal transmitted on a sidelink (such as an NR sidelink). The payload may also be a random access channel (RACH) signal in 5G NR or another RAT. In yet another example, the payload may be downlink control information (DCI) or a wake-up signal.

[0152] Fig.19A is a diagram illustrating an example of a transmitter architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure. Fig.19B is a diagram illustrating an example of a receiver architecture for a non-coherent communication system in accordance with certain aspects of the present disclosure. Fig.19A The transmitter 1900 is similar to Fig.16 The transmitter 1600. In the example Fig.19A In the example, transmitter 1900 outputs two sequences x (0) and x (1) , which are either superimposed (not shown) into a signal of length n or cascaded (not shown) into a signal y0, ... y of length n × L N-1 For transmission to the receiver 1950, where L represents the number of sequences. The receiver 1950 includes a device for processing the received signal to generate a first sequence x (0) The first candidate list 1904 and the second sequence x (1)The receiver 1950 finds the candidate that satisfies the parity check in each list at block 1908 and outputs the first sequence x detected jointly. (0) and the second sequence x (1) Although two lists and sequences (eg, segments) are described, the disclosure is not limited to two.

[0153] Fig. 20 1 is a flow chart of a wireless communication method, for example, for a receiving device, according to various aspects of the present disclosure. Fig. 20 As shown in , in some aspects, method 2000 may perform non-coherent reception. Method 2000 may include receiving a non-coherent signal having multiple segments from a transmitting device. Each segment includes a complex codeword sequence corresponding to an information bit and a parity bit (block 2020). For example, receiver devices 310, 350 may receive a non-coherent signal (via antennas 320, 352, demodulators 318, 354, receiving processors 370, 356, controllers / processors 375, 359 and memories 376, 360). The non-coherent signal includes multiple segments. For example, if the transmitter divides the information bit plus the parity bit into two segments, the two sequences form a non-coherent signal.

[0154] The goal of the receiver is to determine both sequences. Thus, once the signal is received, in some aspects the receiver can jointly detect the sequence from each segment of the received signal by using the parity bits (block 2040). For example, the receiving device 310, 350 can use the controller / processor 375, 359 and the memory 376, 360 to process the data.

[0155] Rather than detecting the two candidate sequences separately from the received signal, the receiver may generate two candidate lists for the two sequences, respectively (e.g., Fig.19B , a first list for a first sequence and a second list for a second sequence). The receiver may find the first detected sequence in the first list and the second detected sequence in the second list so that they satisfy the parity check (e.g., the information bits plus the parity bits corresponding to the two sequences satisfy the parity check condition). That is, each candidate in the first list and the second list may correspond to a set of bits. The receiver may extract a first arbitrary candidate from the first set and a second arbitrary candidate from the second set, determine their corresponding bits, and check whether the two sets of bits jointly satisfy the parity check. If satisfied, it is assumed that the sequence pair is a sequence pair transmitted by the transmitter. If not satisfied, the receiver may move to another sequence pair (e.g., one sequence from each list) until the receiver finds a sequence pair with corresponding bits that satisfy the parity check. In other words, the receiver uses the parity check bits to determine the final candidate from each list.

[0156] According to various aspects of the present disclosure, the product of the sizes of the first list and the second list should be less than a threshold. For example, the product of the sizes of the first list and the second list may be less than a threshold based on the total parity check length (A) and a predetermined false alarm rate P. FA To determine the threshold. In one example, T0×T1…×T L-1 ≤P FA ×2 A , where Tj represents the list size Tj of the jth list, P FA represents the determined false alarm rate, and A is the total parity check length.

[0157] The present disclosure relates to a non-coherent communication system, wherein a receiving device may be configured to determine or decode information received from a transmitting device without performing any channel estimation. In addition, the transmitting device may be configured not to transmit any pilot / DMRS, which may provide additional resources to transmit information to the receiving device. At least one advantage of the present disclosure is that a non-coherent scheme may be utilized in the uplink for coverage enhancement (e.g., PUCCH and / or PUSCH channels). At least another advantage of the present disclosure is that a non-coherent scheme may be used for preamble-free random access in a 2-step RACH procedure. For example, instead of transmitting a preamble and data (e.g., message A), the transmitting device may use non-coherent communication to directly transmit data without transmitting DMRS and preamble. Another advantage is that a non-coherent scheme may be used on the PDCCH for the purpose of complexity reduction, which may reduce the complexity of blind decoding. In addition, a non-coherent scheme may be used on a discovery channel in a sidelink communication (e.g., UE-to-UE communication).

[0158] Implementation examples are described in the following numbered clauses:

[0159] 1. A method for wireless communication at a transmitting device, comprising:

[0160] adding parity bits to the set of information bits;

[0161] generating a non-coherent transmission signal by mapping a set of parity bits and information bits into a sequence of complex symbols; and

[0162] A non-coherent transmission signal is transmitted to a receiving device.

[0163] 2. The method of clause 1, wherein the parity bits include cyclic redundancy check (CRC) bits.

[0164] 3. A method as in clause 1 or 2, wherein the parity bits further include additional parity bits based on the information bit set and / or the CRC bits.

[0165] 4. The method of any of the preceding clauses, wherein generating the incoherent transmission signal comprises:

[0166] segmenting the set of information bits and parity bits into a plurality of segments including subsets of the information bits plus the parity bits; and

[0167] Each subset is mapped to a corresponding sequence of a plurality of sequences for a non-coherent transmission signal, each sequence comprising n complex symbols.

[0168] 5. The method of clause 4, wherein the parity bits include cyclic redundancy check (CRC) bits and additional parity bits based on the set of information bits plus at least two different subsets of parity bits and / or at least two different subsets of the CRC bits.

[0169] 6. A method as described in clause 4 or 5, wherein a plurality of sequences are concatenated to form a complex codeword sequence for the non-coherent transmission signal.

[0170] 7. A method as in clause 4 or 5, wherein a plurality of sequences are superimposed to form a complex symbol sequence for a non-coherent transmission signal.

[0171] 8. The method of clause 4, 5, 6 or 7, further comprising: in response to the set of information bits including a payload, determining the number of the plurality of segments based on the number of bits of the payload.

[0172] 9. A method as recited in clause 4, 5, 6, 7 or 8, wherein the information bits comprise an uplink control information (UCI) payload transmitted on a physical uplink control channel (PUCCH).

[0173] 10. A method as in any of the preceding clauses, wherein when the payload corresponding to the information bit set is less than a threshold, the parity bits include a first number of cyclic redundancy check (CRC) bits, and when the payload corresponding to the information bit set is greater than the threshold, the parity bits include a second number of bits.

[0174] 11. A method as in any of the preceding clauses, wherein when the payload corresponding to the information bit set is less than a threshold, the parity bits include a first number of cyclic redundancy check (CRC) bits and a second number of additional parity bits, and when the payload corresponding to the information bit set is greater than the threshold, the parity bits include a third number of CRC bits and a fourth number of additional parity bits.

[0175] 12. The method of any of the preceding clauses, further comprising determining the number of parity bits based on the number of segments into which the set of information bits is divided.

[0176] 13. A method for wireless communication at a receiving device, comprising:

[0177] receiving, from a transmitting device, a non-coherent signal having at least one segment, each segment including a sequence of complex symbols corresponding to information bits and parity bits; and

[0178] The sequence is jointly detected from each segment of the received non-coherent signal by using the parity bits.

[0179] 14. The method of clause 13, wherein jointly detecting comprises:

[0180] generating a candidate list for each sequence; and

[0181] The sequence is looked up in each candidate list based on the parity bits.

[0182] 15. The method of clause 14, wherein finding the sequence further comprises: finding a sequence such that corresponding information bits and parity bits of the sequence in each candidate list satisfy a parity condition represented by the parity bits.

[0183] 16. The method of clause 15, wherein the product of each list size is less than a threshold based on a predetermined false alarm rate and a number of parity bits.

[0184] 17. The method of clause 13, 14, 15 or 16, further comprising: in response to the information bits comprising a payload, determining the number of parity bits based on the number of bits of the payload.

[0185] 18. The method of any of clauses 13-17, further comprising: in response to the information bits comprising a payload, determining a number of at least one segment based on a number of bits of the payload.

[0186] 19. The method of any of clauses 13-18, further comprising: determining the information bits based on jointly detecting the sequences.

[0187] 20. A transmitting device for wireless communication, comprising:

[0188] Memory, and

[0189] one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to:

[0190] adding parity bits to the set of information bits;

[0191] generating a non-coherent transmission signal by mapping a set of parity bits and information bits into a sequence of complex symbols; and

[0192] A non-coherent transmission signal is transmitted to a receiving device.

[0193] 21. The transmitting device of clause 20, wherein the parity check bits include cyclic redundancy check (CRC) bits.

[0194] 22. The transmitting device of clause 21, wherein the parity bits further include additional parity bits based on the information bit set and / or the CRC bits.

[0195] 23. The transmitting device of any of clauses 20-22, wherein the one or more processors are further configured to:

[0196] segmenting the set of information bits and parity bits into a plurality of segments including subsets of the information bits plus the parity bits; and

[0197] Each subset is mapped to a corresponding sequence of a plurality of sequences for a non-coherent transmission signal, each sequence comprising n complex symbols.

[0198] 24. The transmitting device of clause 23, wherein the parity bits include cyclic redundancy check (CRC) bits and additional parity bits based on the set of information bits plus at least two different subsets of parity bits and / or at least two different subsets of said CRC bits.

[0199] 25. The transmitting device of clause 23 or 24, wherein a plurality of sequences are concatenated to form a sequence of complex symbols to form a non-coherent transmission signal.

[0200] 26. The transmitting device of clause 23 or 24, wherein a plurality of sequences are superimposed to form a complex symbol sequence to form a non-coherent transmission signal.

[0201] 27. A transmitting device as described in any of clauses 20-26, wherein when the payload corresponding to the information bit set is less than a threshold, the parity bits include a first number of cyclic redundancy check (CRC) bits, and when the payload corresponding to the information bit set is greater than the threshold, the parity bits include a second number of bits.

[0202] 28. A transmitting device as in any one of clauses 20-27, wherein when the payload corresponding to the information bit set is less than a threshold value, the parity bits include a first number of cyclic redundancy check (CRC) bits and a second number of additional parity bits, and when the payload corresponding to the information bit set is greater than the threshold value, the parity bits include a third number of CRC bits and a fourth number of additional parity bits.

[0203] 29. The transmitting device of any of clauses 20-28, wherein the one or more processors are further configured to determine the number of parity bits based on the number of segments into which the set of information bits is divided.

[0204] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0205] It will be apparent that the described systems and / or methods can be implemented in various forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the aspects. Thus, the operation and behavior of these systems and / or methods are described without reference to specific software code - it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0206] The previous description is provided to enable any person skilled in the art to practice the various aspects described. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described as "exemplary" herein need not be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" refers to one or more. Combinations such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C", and "A, B, C or any combination thereof" include any combination of A, B and / or C, and may include multiple A, multiple B or multiple C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are currently or hereafter known to those of ordinary skill in the art are expressly incorporated by reference and are intended to be covered by the claims. In addition, nothing disclosed is intended to be contributed to the public, regardless of whether such disclosure is explicitly recited in the claims. The terms "module," "mechanism," "element," "device," and the like may not be a substitute for the term "means." Thus, no claim element should be interpreted as a means-plus-function unless the element is explicitly recited using the phrase "means for..."

Claims

1. A method for wireless communication at a transmitting device, comprising: adding parity bits to the set of information bits; segmenting the set of information bits and the parity bits into a plurality of segments including subsets of the information bits plus the parity bits, the segmenting occurring after the adding; generating a non-coherent transmission signal by mapping the information bits plus a subset of parity bits into a plurality of sequences of complex symbols; as well as The non-coherent transmission signal is transmitted to a receiving device.

2. The method of claim 1, wherein the parity bits comprise cyclic redundancy check (CRC) bits.

3. The method of claim 2, wherein the parity bits further include additional parity bits based on the information bit set and / or the CRC bits.

4. The method of claim 1 , wherein generating the incoherent transmission signal comprises: Each subset is mapped to a corresponding sequence among the plurality of sequences for the non-coherent transmission signal, each sequence including n complex symbols.

5. The method of claim 4, wherein the parity bits include cyclic redundancy check (CRC) bits and additional parity bits based on the set of information bits plus at least two different subsets of parity bits and / or at least two different subsets of the CRC bits.

6. The method of claim 4, wherein the plurality of sequences are concatenated to form the complex symbol sequence for the non-coherent transmission signal.

7. The method of claim 4, wherein the plurality of sequences are superimposed to form the complex symbol sequence for the non-coherent transmission signal.

8. The method of claim 4, further comprising: In response to the set of information bits including a payload, the number of the plurality of segments is determined based on the number of bits of the payload.

9. The method of claim 1, wherein the information bits comprise an uplink control information (UCI) payload transmitted on a physical uplink control channel (PUCCH).

10. The method of claim 1 , wherein when the payload corresponding to the information bit set is less than a threshold, the parity bits include a first number of cyclic redundancy check (CRC) bits, and when the payload corresponding to the information bit set is greater than the threshold, the parity bits include a second number of bits.

11. The method of claim 1 , wherein when the payload corresponding to the information bit set is less than a threshold value, the parity bits include a first number of cyclic redundancy check (CRC) bits and a second number of additional parity bits, and when the payload corresponding to the information bit set is greater than the threshold value, the parity bits include a third number of CRC bits and a fourth number of additional parity bits.

12. The method of claim 1, further comprising: The number of parity bits is determined based on the number of segments into which the set of information bits is divided.

13. A method for wireless communication at a receiving device, comprising: receiving, from a transmitting device, a non-coherent signal having a plurality of segments, each segment comprising a sequence of complex symbols corresponding to a subset of information bits plus parity bits; as well as The sequence is jointly detected from each segment of the received non-coherent signal by using the parity bits.

14. The method of claim 13, wherein jointly detecting comprises: Generate a candidate list for each sequence; as well as The sequence is searched in each candidate list based on the parity bits.

15. The method of claim 14, wherein finding the sequence further comprises: A sequence is found that makes the corresponding information bits and parity bits of the sequence in each candidate list satisfy the parity condition represented by the parity bits.

16. The method of claim 15, wherein the product of each list size is less than a threshold based on a predetermined false alarm rate and the number of parity bits.

17. The method of claim 13, further comprising: In response to the information bits including a payload, a number of parity bits is determined based on a number of bits of the payload.

18. The method of claim 13, further comprising: In response to the information bits including a payload, the number of the plurality of segments is determined based on the number of bits of the payload.

19. The method of claim 13, further comprising: The information bits are determined based on jointly detecting the sequence from each segment.

20. A transmitting device for wireless communication, comprising: Memory, and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: adding parity bits to the set of information bits; segmenting the set of information bits and the parity bits into a plurality of segments including subsets of the information bits plus the parity bits, the segmenting occurring after the adding; generating a non-coherent transmission signal by mapping the information bits plus a subset of parity bits into a plurality of sequences of complex symbols; as well as The non-coherent transmission signal is transmitted to a receiving device.

21. The transmitting device of claim 20, wherein the parity check bits include cyclic redundancy check (CRC) bits.

22. The transmitting device of claim 21, wherein the parity bits further include additional parity bits based on the information bit set and / or the CRC bits.

23. The transmitting device of claim 20, wherein the one or more processors are further configured to: Each subset is mapped to a corresponding sequence among the plurality of sequences for the non-coherent transmission signal, each sequence including n complex symbols.

24. The transmitting device of claim 23, wherein the parity bits include cyclic redundancy check (CRC) bits and additional parity bits based on the information bit set plus at least two different subsets of parity bits and / or at least two different subsets of the CRC bits.

25. The transmitting device of claim 23, wherein the plurality of sequences are concatenated to form the complex symbol sequence to form the non-coherent transmission signal.

26. The transmitting device of claim 23, wherein the plurality of sequences are superimposed to form the complex symbol sequence to form the non-coherent transmission signal.

27. The transmitting device of claim 20, wherein when the payload corresponding to the information bit set is less than a threshold value, the parity bits include a first number of cyclic redundancy check (CRC) bits, and when the payload corresponding to the information bit set is greater than the threshold value, the parity bits include a second number of bits.

28. The transmitting device of claim 20, wherein when the payload corresponding to the information bit set is less than a threshold value, the parity bits include a first number of cyclic redundancy check (CRC) bits and a second number of additional parity bits, and when the payload corresponding to the information bit set is greater than the threshold value, the parity bits include a third number of CRC bits and a fourth number of additional parity bits.

29. The transmitting device of claim 20, wherein the one or more processors are further configured to determine the number of parity bits based on the number of segments into which the set of information bits is divided.

30. A receiving device for wireless communication, comprising: Memory, and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receiving, from a transmitting device, a non-coherent signal having a plurality of segments, each segment comprising a sequence of complex symbols corresponding to a subset of information bits plus parity bits; and These sequences are jointly detected from each segment of the received incoherent signal by using the parity bits.

31. A transmitting device for wireless communication, comprising: means for adding parity bits to the set of information bits; means for segmenting said set of information bits and said parity bits into a plurality of segments comprising subsets of information bits plus parity bits, said segmenting occurring after said adding; means for generating a non-coherent transmission signal by mapping said information bits plus a subset of parity bits into a plurality of sequences of complex symbols; as well as Means for transmitting the non-coherent transmission signal to a receiving device.

32. A receiving device for wireless communication, comprising: means for receiving from a transmitting device a non-coherent signal having a plurality of segments, each segment comprising a sequence of complex symbols corresponding to a subset of information bits plus parity bits; as well as Means for jointly detecting these sequences from each segment of the received non-coherent signal by using said parity bits.

33. A computer-readable medium storage storing instructions that, when executed by a processor of a transmitting device, cause the processor to: adding parity bits to the set of information bits; segmenting the set of information bits and the parity bits into a plurality of segments including subsets of the information bits plus the parity bits, the segmenting occurring after the adding; generating a non-coherent transmission signal by mapping the information bits plus a subset of parity bits into a plurality of sequences of complex symbols; and The non-coherent transmission signal is transmitted to a receiving device.

34. A computer-readable medium storage storing instructions that, when executed by a processor of a recipient device, cause the processor to: receiving, from a transmitting device, a non-coherent signal having a plurality of segments, each segment comprising a sequence of complex symbols corresponding to a subset of information bits plus parity bits; and These sequences are jointly detected from each segment of the received incoherent signal by using the parity bits.

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