634results about "Code division multiplex" patented technology

An internet of things (IoT) non-terrestrial network (NTN) device user equipment (UE) is described. The UE includes receiving circuitry configured to receive narrowband physical random access channel (NPRACH) configurations including NPRACH resource configuration, repetition parameters, orthogonal cover code (OCC) multiplexing methods and OCC multiplexing factors. The UE also includes transmitting circuitry configured to select an NPRACH resource and randomly select an OCC index for an OCC multiplexing. The transmitting circuitry is further configured to transmit NPRACH preambles with a configured OCC multiplexing method and a multiplexing factor.

A terminal according to one aspect of the present disclosure includes a receiving section that receives a configuration indicating more than four sounding reference signal (SRS) ports and a configuration of a comb index, and a control section that applies different values to the comb index of some SRS ports and the comb index of other SRS ports out of the more than four SRS ports, based on the configuration of the comb index. According to one aspect of the present disclosure, transmission of an SRS using more than four SRS ports can be appropriately performed.

The embodiment of the invention discloses equipment, a method and a device for beam reporting. A first terminal device receives a plurality of sidelink (SL) positioning reference signal (PRS) configurations from a plurality of terminal devices. The first terminal device determines, based on the plurality of SL PRS configurations, whether the plurality of terminal devices select overlapping resources for the plurality of SL PRS transmissions. Based on determining that the plurality of terminal devices have selected overlapping resources for the plurality of SL PRS transmissions, the first terminal device sends, to a second terminal device among the plurality of terminal devices, a request to update the SL PRS transmissions by the second terminal device.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system includes receiving, from a base station, configuration information on an orthogonal cover code (OCC), identifying a transport block (TB) and multiple slots for a TB processing, based on the configuration information, applying a different OCC sequence to each repetition of the TB, and transmitting, to the base station, a physical uplink shared channel (PUSCH).

This application discloses a resource configuration method, a resource determining method and apparatus, a communication device, and a storage medium, and belongs to the field of communication technologies. The resource configuration method in embodiments of this application includes: configuring, by a signal sending node, a first resource based on a predetermined first array, where the first array includes at least one Costas array or at least one Costas array set, and each Costas array set includes at least one Costas array; and sending, by the signal sending node, a first signal by using the first resource.

A wireless transmit / receive unit (WTRU) may be configured to receive a primary synchronization signal (PSS) scrambled with a first sequence and to determine a PSS sequence index (uk) associated with the PSS and a first sequence index (wi) associated with the first sequence. The WTRU may be configured to determine a first parameter set based on the PSS sequence index (uk) and the first sequence index (wi) and to send information using at least one parameter from the determined first parameter set. The first parameter set may be associated with a waveform. The first parameter set may comprise at least one of: an indication of a waveform type and an indication of a multiplexing scheme. The information may be a physical random access channel (PRACH) transmission. The WTRU may be configured to determine a first offset based on the PSS sequence index (uk) and the first sequence index (wi).

A user equipment (UE) that includes one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining the transport block size for a Physical Uplink Shared Channel (PUSCH) transmission and at least one processor coupled to the one or more non-transitory computer-readable media is provided. The processor is configured to execute the one or more computer-executable instructions to cause the UE to determine whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission; determine a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission; and determine the transport block size using a scaling factor in a case that the OCC is applied to the PUSCH transmission, the scaling factor being determined based on the spreading factor.

The invention discloses an unmanned aerial vehicle image transmission signal frequency and bandwidth estimation method and device, and the method comprises the steps: carrying out the segmentation interception of a received signal, and obtaining a signal segmentation sequence; performing preliminary screening on the signal segments by using the frequency spectrum conjugate symmetry of the ZC sequence; carrying out delay correlation processing on the primarily screened signal segments to obtain a delay correlation result sequence, taking an index value corresponding to the maximum modulus value of the delay correlation result sequence as an initial index, and obtaining a signal segment containing a ZC sequence; zC sequences under different bandwidths stored locally are obtained, conjugate multiplication is carried out on the ZC sequences and signal fragments containing the ZC sequences, whether the signals are image transmission signals of the unmanned aerial vehicle or not is determined according to frequency spectrum module value peaks of conjugate multiplication results, and meanwhile the center frequency and the bandwidth of the image transmission signals are obtained. According to the invention, the signals are intercepted in a segmented manner, and the peak-to-average ratio is used for rapid preliminary screening, so that the real-time performance is significantly improved; robustness and accuracy are greatly enhanced through a double-confirmation mechanism, calculation is efficient, and the method has good application prospects.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention relates to a method and an apparatus for estimating an uplink channel of a base station in a wireless communication system, comprising the steps of: estimating a position of a wireless channel tap on the basis of a sounding reference signal (SRS) received from a terminal; determining an average power value of the wireless channel tap for each link between a transmitting antenna and a receiving antenna from and to which the SRS is transmitted; and estimating an effective channel frequency response (effective CFR) of a physical uplink shared channel (PUSCH) on the basis of the position of the wireless channel tap and the average power value of the wireless channel tap.

The embodiment of the invention provides a communication method and device, relates to the field of communication, and can enable more users to perform uplink communication. The communication method comprises the following steps: generating a first signal, and sending the first signal. Wherein the first signal is determined according to a first base sequence, the first base sequence is one base sequence in a first base sequence group in N base sequence groups, and the first base sequence group comprises K base sequences; wherein under the condition that N is an integer greater than 30, K is a positive integer; under the condition that N is equal to 30, K is an integer greater than 2.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for interference reduction techniques between passive wireless devices. In some aspects, a source device, a reader device, or a passive wireless device may support one or more interference avoidance mechanisms according to which the reader device may experience less interference from other devices within a system or may more accurately decode messaging that is meant for the reader device from the radio frequency signaling received at an antenna of the reader device, or both. In some implementations, multiple passive wireless devices may each add or apply a respective communications signature to a reflected or backscattered signal from that passive wireless device. The respective communications signatures may uniquely identify backscattered signaling from a specific passive wireless device such that a reader device may parse through received signaling and extract and decode a relevant message.

Some aspects of the present disclosure provide methods and devices that enable a framework for selection or configuration, or both, of a waveform for use in integrated sensing and communications (ISAC). Use of the framework provides a new waveform, based in part on various criteria, which provides a trade-off among different ISAC requirements. Therefore, when different criteria are important for a particular implementation, a waveform that best meets the requirement of those criteria may be used. The various criteria may include factors such as hardware constraints at the UE, radio frequency (RF) chirp generation or detections capability at the UE, spectral emission or leakage such as OOBE, sensing performance, and sensing complexity. In some embodiments, a cyclic prefix (CP) is provided to use the chirp-based sensing waveforms as a demodulated reference signal (DMRS). In some embodiments, the CP enables alignment with a communication signal frame.

Various aspects of the present disclosure relate to transmitting a first random access configuration comprising code domain information and receiving a first set of random access transmissions from a set of internet-of-things (IoT) devices, each random access transmission of the first set of random access transmissions multiplexed according to the code domain information. Aspects of the present disclosure may relate to transmitting a second random access configuration to a subset of IoT devices of the set of IoT devices based at least in part on a collision between a subset of random access transmissions of the first set of random access transmissions, where the subset of random access transmissions is associated with the subset of IoT devices, and receiving a second set of random access transmissions based on the second random access configuration.

A sequence transmission method and an apparatus are provided, which may be applied to a downlink synchronization scenario, a random access scenario, a sensing scenario, a radar scenario, an integrated sensing and communication scenario, or the like, to increase sequence design diversity, and improve sequence design flexibility and target detection accuracy. The method includes: A transmit end apparatus determines N first sequences, and sends the N first sequences. An nth first sequence in the N first sequences is determined based on an nth second sequence in N second sequences, formula (I), am is a prime number, M is a positive integer greater than 1, and n=0,1, . . . , N−1. Each second sequence is a sequence in a Golay complementary pair GCP. The N second sequences include formula (II) first sub-sequence sets, each first sub-sequence set includes am second sub-sequence sets, each second sub-sequence set includes formula (III) second sequences, m=0,1, . . . , M−1, and a−1=1.

The invention discloses a pilot frequency transmission method and device. The method comprises the following steps: determining a first length; determining a first sequence pair according to the first length; wherein the first sequence pair comprises at least two sequences, and the length of each sequence in the at least two sequences is a first length; generating at least two pilot symbols based on the first sequence pair; and outputting the at least two pilot symbols. According to the scheme, when the pilot symbol is generated, the length of the sequence used for generating the pilot symbol is considered, the pilot symbol can be generated based on the sequence with the proper length (namely the first length), and the technical effect of considering the overhead and effectiveness of channel estimation is achieved.

Aspects relate to enhancing communication between network entities and ambient IoT devices using a cyclic prefix (CP) transparent on-off keying (OOK) waveform. An ambient IoT device may be configured to receive an OOK orthogonal frequency-division multiplexing (OFDM) waveform that includes a CP. The ambient IoT device may be configured to sample symbols of the received OOK OFDM waveform at a pre-defined sampling rate. The pre-defined sampling rate may be based upon a pre-defined duration of the symbols of the received OOK OFDM waveform. In particular, the pre-defined duration of each of the symbols of the received OOK OFDM waveform may be defined such that a last OOK OFDM symbol duration is set to be the same as a first OOK OFDM symbol duration, in which, the first OOK OFDM symbol includes the CP.

A method for managing wireless device communications includes establishing active, persistent, and repetitive communications with a wireless device operating in a coverage area of a local wireless network. In an example, the local wireless network is an overlay to a portion of a macro wireless network. The repetitive communications include placing a call to the wireless device, completing a call connection to the wireless device, sending a message to the wireless device, receiving and processing a response to the message from the wireless device, and persistently repeating a call function of the placing a call, completing a connection, sending a response, and receiving and processing the response until a specified termination event. In an example, the termination event is a power off of the wireless device.

An integrated circuit for a pen includes reception circuitry configured to receive an uplink signal generated according to a first protocol and transmission circuitry configured to transmit, according to the first protocol, a downlink signal based on a reception timing of the uplink signal and a command included in the uplink signal. In a case where the reception circuitry receives the uplink signal that is in a normal state (uplink signal NUS) in a first period, the transmission circuitry transmits the downlink signal including data according to the command included in the uplink signal NUS. In a case where the reception circuitry receives the uplink signal that is in a special state (uplink signal SUS) in a second period subsequent to the first period, the transmission circuitry transmits the downlink signal including data according to the command included in the uplink signal NUS received in the first period.

A user equipment (UE) is configured to receive a sounding reference signal (SRS) configuration for SRS resources including time domain orthogonal cover code (TD-OCC) parameters for applying TD-OCC to the SRS resources, the TD-OCC parameters including a TD-OCC pattern and a TD-OCC length for the TD-OCC pattern, apply the TD-OCC to the SRS resources in accordance with the configured parameters and perform uplink (UL) transmissions based on a power control scheme for SRS TD-OCC and a collision handling scheme for SRS TD-OCC.

The invention discloses a time synchronization method in a multi-rate OFDM (Orthogonal Frequency Division Multiplexing) communication system. The time synchronization method comprises the following steps: S1, forming a training symbol based on a ZC sequence; s2, quantifying the matching degree of a received signal and a synchronous signal in the multi-rate OFDM communication system; s3, performing sliding window energy normalization on the received signal to generate a dynamic detection threshold value; and S4, when the matching degree of the received signal and the synchronization signal is greater than a dynamic detection threshold, detecting the peak position of the synchronization signal, and outputting a timing estimation position to realize time synchronization. According to the method, a ZC sequence synchronization mechanism is expanded to a dynamic bandwidth scene for the first time, the synchronization problem under a complex channel in unmanned aerial vehicle communication is solved through unique characteristics of the ZC sequence, the technical blank of high-maneuverability unmanned aerial vehicle communication is filled, and efficient and high-precision time synchronization is achieved.

The present disclosure provides a method and a system to estimate LO leakage and quadrature error parameters for a transmitter RF front end, such as a direct up-conversion transmitter RF front end, in a joint fashion. The proposed method utilizes a PN sequence inserted at the transmitter baseband. At the observation receiver side, an RX accumulator is implemented to sum receiver signals to take advantage of a despreading gain using the same PN sequence from transmitter side. Through the despreading process, the receiver-transmitter channel may be estimated and used to extract the quadrature error parameters. The estimated channel may also be used to eliminate user data interference presented within the RX accumulator output, which may further be used to compute the LO leakage.

Disclosed are methods, systems, and computer-readable medium to perform operations including: generating a mapping pattern that comprises a length-4 frequency division orthogonal cover code (FD-OCC4), the mapping pattern for mapping demodulation reference signals (DMRS) in frequency to a plurality of resource elements in at least one orthogonal frequency-division multiplexing (OFDM) symbol, wherein the DMRS are associated with a plurality of DMRS ports; mapping, using the FD-OCC4, the DMRS to the plurality of resource elements in the at least one OFDM symbol; and transmitting a transmission comprising the at least one OFDM symbol.

An internet of things (IoT) non-terrestrial network (NTN) device user equipment (UE) is described. The UE includes receiving circuitry configured to receive configurations on orthogonal cover code (OCC) multiplexing support and OCC multiplexing factor for narrowband internet of things (NB-IoT) narrowband physical uplink shared channel (NPUSCH) in a higher layer signaling. The receiving circuitry is also configured to receive a separately configured orthogonal cover code radio network temporary identifier (OCC-RNTI) and / or a number of repetitions table for a repetition number field in downlink control information (DCI) format 0 and to receive a DCI format N0 for a NPUSCH transmission with an OCC index indication. The UE also includes transmitting circuitry configured to transmit an NPUSCH with OCC multiplexing with the provided OCC multiplexing factor and the indicated OCC index on a schedule resource.

The invention discloses a chaos communication and perception integrated signal processing method and device and a communication system, and the method comprises the steps: segmenting an information bit sequence into a modulation bit sequence, an index bit sequence and a PPM bit sequence, and carrying out the processing of an initial signal vector through the combination of a pulse position modulation technology, according to the scheme, the frequency spectrum utilization rate is optimized through dual control of modulation bits and index bits, initial modulation signals are segmented according to PPM orders, signal vectors are generated, time domain offset is carried out on the signal vectors in combination with a shift matrix, the good self-correlation characteristic and the low cross-correlation characteristic of LFM signals are utilized, on the basis of an original DCSK-LFM modulation mode, the frequency spectrum utilization rate is improved, and the frequency spectrum utilization rate is improved. And in combination with pulse position modulation and index modulation, the same carrier can bear more information, so that the transmission rate when the method is applied to a JRC system and the overall performance of a communication system are improved.

A user equipment (UE) configured to: establish a connection with a 5th Generation (5G) new radio (NR) network, where the connection is configured to utilize a cyclic prefix (CP)-Orthogonal Frequency Division Multiplexing (OFDM) waveform and a Demodulation Reference Signal (DMRS) Type 1; receiving a DMRS port indication, the DMRS port indication configured to indicate one or more DMRS ports assigned to the UE, where a single symbol DMRS type 1 is configured to support up to 8 DMRS ports, and a dual symbol DMRS type 1 is configured to support up to 16 DMRS ports; and performing a transmission operation or a reception operation using the one or more DMRS ports assigned to the UE.

A communication method and system, the method including receiving, by a terminal device or a chip in the terminal device, a synchronization parameter related to a synchronization signal, receiving a low power wake-up signal, the low power wake-up signal includes the synchronization signal, the low power wake-up signal includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain, carrying a plurality of on-off keying (OOK) symbols, each OOK symbol corresponds to one time domain sequence associated with frequency domain amplitude randomization, and the synchronization signal is indicated by at least one of OOK symbols, determining, based on the synchronization parameter, time domain sequences corresponding to OOK symbols carried on the plurality of OFDM symbols, and performing auxiliary synchronization on the terminal device based on the time domain sequences corresponding to the OOK symbols carried on the plurality of OFDM symbols.

This application discloses a phase tracking reference signal transmission method and apparatus, a terminal, and a network-side device. The phase tracking reference signal transmission method of the embodiments of this application includes: determining, by a terminal, a transmission parameter for a PTRS; and sending, by the terminal, the PTRS based on the transmission parameter, or receiving, by the terminal, the PTRS based on the transmission parameter.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system includes receiving, from a base station, configuration information on an orthogonal cover code (OCC), identifying a transport block (TB) and multiple slots for a TB processing, based on the configuration information, applying a different OCC sequence to each repetition of the TB, and transmitting, to the base station, a physical uplink shared channel (PUSCH).

This application relates to a UWB-based PPDU transmission method and an apparatus. The method includes: Two communication parties exchange a PPDU. The PPDU includes a first sequence. The first sequence is a ternary perfect sequence, and a periodic cross-correlation function of the first sequence and a second sequence belonging to a same sequence pair has a maximum of three different values. According to embodiments of this application, interference between devices can be reduced. This application is applied to a UWB-based WPAN system, a sensing system, or the like, including 802.15 series protocols, for example, the 802.15.4ab standard or a next-generation standard of 802.15.4ab. This application may be further applied to a WLAN system supporting 802.11 series protocols such as a next-generation Wi-Fi protocol of 802.11ax like 802.11be, Wi-Fi 7, or EHT, a next-generation protocol of 802.11be like Wi-Fi 8 or UHR, or Wi-Fi AI.