160results about "Multiplex code generation" patented technology

The present disclosure relates to demodulation reference signal (DMRS) design with code division multiplexing (CDM) group expansion. A network device may be configured to generate a DMRS and send the DMRS to a wireless device. The DMRS may be coded with one of a plurality of expanded orthogonal cover codes (OCCs) belonging to an expanded CDM group. The expanded CDM group may be generated by expanding a legacy CDM group including a plurality of legacy OCCs. The number of frequency domain elements in each of the plurality of expanded OCCs may be expanded as twice the number of frequency domain elements in each of the plurality of legacy OCCs.

The subject of this disclosure is applying improved techniques to media signal communication as well as control and status exchange to implement a diversity of media interfaces, achieving suitable media communication results despite EM propagation challenges.

A transmitting end determines a transmitted waveform sequence set, where the transmitted waveform sequence set includes N sequences, the transmitted waveform sequence set includes a sequence having an aperiodic ZCZ, and a sequence length of the sequence is Q. The transmitting end sends Q pulse bursts to a receiving end based on the N sequences, where each pulse burst includes N pulses, a jth pulse in an ith pulse burst in the Q pulse bursts corresponds to an ith element in a jth sequence in the N sequences, 1≤i≤Q, and 1≤j≤N.

This application provides a signal transmission method and apparatus, to reduce time-frequency resource overheads for signal transmission, improve spectral efficiency, and therefore, improve system performance. The method includes: determining a permutation complementary sequence set, where the permutation complementary sequence set includes M member sequences, the member sequence includes N member symbols, both M and N are integers greater than 1, the member symbol is obtained by performing a permutation operation on a parameter of the permutation complementary sequence set, the permutation operation is a single mapping operation in a finite domain, and the permutation complementary sequence set satisfies an aperiodic correlation; and sending a signal based on the permutation complementary sequence set.

A method of operating a communications device for transmitting signals to and / or receiving signals from a wireless communications network via a wireless access interface is provided. The method comprises determining that the communications device has uplink data to transmit to the wireless communications network, constructing an uplink signal comprising the uplink data by initialising one or more characteristics of the uplink signal, wherein the one or more characteristics of the uplink signal are associated with a reference value known to each of the communications device and the wireless communications network, and transmitting the uplink signal to the wireless communications network.

The invention relates to the technical field of pseudo-random binary sequence design, in particular to a parallel PRBS generation method and system for testing a multi-protocol high-speed serial transceiver, and the method comprises the steps: setting demand parameters of a pseudo-random binary sequence for testing the multi-protocol high-speed serial transceiver, and enabling the demand parameters to comprise an order, a bit number and a feedback polynomial; constructing a generator matrix for describing state transition of the linear feedback shift register according to the feedback polynomial; according to the bit number of the pseudo-random binary sequence, generating a mapping matrix of the pseudo-random binary sequence through the exponentiation of the generated matrix; based on the mapping matrix and the current beat linear feedback shift register state, outputting a pseudo-random binary sequence meeting the requirement parameters for testing the multi-protocol high-speed serial transceiver. According to the method, parallel generation of any PRBS can be supported, the PRBS parallel implementation logic configuration is simple, the hardware implementation complexity is low, the PRBS output throughput rate is high, and the design requirements of multi-protocol high-speed SerDes can be met.

To provide a base station and a method for transmitting and receiving data and / or reference signals on resources.SOLUTION: In a communication system, a base station 260 transmits parameters defining a configuration for allocating each resource for carrying a reference signal to a port. Control information indicates cooperative scheduling information, and each resource includes two resource element configurations. The base station further transmits to a mobile terminal 210 an indicator indicating whether a first resource element configuration or a second resource element configuration is used.SELECTED DRAWING: Figure 2

A transmitter according to one aspect of the present invention generates a pulse code train by encoding transmission information according to assignment of each of one or more pulse code trains to a respective codeword, and transmits the generated pulse code train. Each of the one or more pulse code trains includes four or more pulses. Each of the one or more pulse code trains is designed so that any pair of the one or more pulse code trains has a maximum of two common pulses under all possible shifts of a discrete number of time slots. This makes it possible to provide a communication technique that can be expected to improve the data rate in data communication by a large number of devices.

An apparatus, method, and computer program product are provided for detecting at least one parent preamble sequence from a carrier wave (CW) signal. The at least one parent preamble sequence is based on a set of one or more parameters. The apparatus, method, and computer program product further provide for generating a child preamble sequence based on an identifier (ID) of an ambient internet of things (A-IoT) device and the set of one or more parameters. In another embodiment, an apparatus, method, and computer program product are provided for detecting a child preamble sequence. The child preamble sequence is based on an identifier (ID) of an ambient internet of things (A-IoT) device and a set of one or more parameters. The apparatus, method, and computer program product further provide for performing one or more actions based on the child preamble sequence.

This application provides a communication method, a communication device, a computer-readable storage medium, a chip, and a computer program product. The communication method includes: determining a first matrix based on a quantity of active terminal devices in a plurality of terminal devices or a quantity of the plurality of terminal devices. The communication method further includes: determining a first sequence based on the first matrix, a probability distribution of to-be-sent data of the plurality of terminal devices, and a predetermined length of the first sequence associated with the plurality of terminal devices. The communication method further includes: performing spreading on modulated data by using the first sequence. The communication method includes: sending spread modulated data to a network device. In the method, sparseness of the active terminal device is used, so that channel decoding complexity can be reduced in a scenario in which the quantity of potential terminal devices is large and the quantity of active terminal devices is small.

Provided is a transmission control method for a plurality of transmitting stations which are connected to a wireless communication partner receiving station by non-orthogonal multiple access, and each of which is capable of transmitting a same signal to the receiving station by repetition for a predetermined number of times at a predetermined cycle, wherein an information processing apparatus executes: acquiring information indicating a code word length for each of the plurality of transmitting stations to use for the repetition; and assigning, to each of the plurality of transmitting stations, transmitting power for ensuring a power difference which is required between transmitting stations, so that the shorter the code word length the higher the receiving power at the receiving station.

This application may be applied to an ultra-wideband UWB-based wireless local area network system, for example, a system supporting IEEE 802.15 series protocols, and may be further applied to a system supporting IEEE 802.11 series protocols. This application provides an ultra-widebandbased sensing method and an apparatus. The method includes: A transmitting end determines a transmitted waveform sequence set, where the transmitted waveform sequence set includes N sequences, the transmitted waveform sequence set includes a sequence having an aperiodic ZCZ, and a sequence length of the sequence is Q; and the transmitting end sends Q pulse bursts to a receiving end based on the N sequences, where each pulse burst includes N pulses, a jth pulse in an ith pulse burst in the Q pulse bursts corresponds to an ith element in a jth sequence in the N sequences, 1≤i≤Q, and 1≤j≤N. The foregoing transmitted waveform sequence set is used, so that no cyclic prefix or cyclic suffix is used, sensing performance of a transmitted waveform sequence can be ensured, and air interface time can be reduced.

Embodiments of this application provide a communication method, a communication apparatus, and a communication system. The method may include: A first apparatus obtains a cyclic shift sequence, where the cyclic shift sequence includes a delay domain cyclic shift and a Doppler cyclic shift; and outputs the cyclic shift sequence, where the cyclic shift sequence is used to generate a random access signal or a sensing signal. According to embodiments of this application, a capacity of available sequences can be increased by performing cyclic shifts in delay domain and Doppler domain.

Provided are a partial pseudo-randomization processing method, a corresponding apparatus, a device and a storage medium. The method includes performing pseudo-randomization processing on part of N bits b1,b2,...,bN to generate new N bits d1,d2,...,dN; and encoding the d1,d2,...,dN. On the premise of ensuring the interference randomization effect, the performance of scheduling-free transmission can be effectively improved, the complexity of encoding and decoding in the scheduling-free transmission can be effectively reduced, and the demodulation performance can be effectively improved.

The invention relates to an efficient frequency hopping sequence construction method based on a national cryptographic algorithm SM4, belongs to the technical field of information security, and solves the problems that in the prior art, frequency hopping sequence design is low in security and insufficient in anti-interference performance and cannot meet the domestic application requirement. Comprising the following steps: generating 32 rounds of round keys based on a user key Key; receiving system clock information TOD and the round key, and generating a pseudo-random sequence of frequency hopping communication through 32 rounds of iterative operation; and converting the pseudo-random sequence to obtain a frequency hopping sequence with an adjustable frequency slot number. The frequency hopping sequence with the adjustable frequency gap number is generated, the safety is high, the efficiency is high, the anti-interference capacity is high, and the domestic application requirement is met.

Wireless communications systems and methods related user multiplexing with discrete Fourier transform (DFT) precoded frequency interlaces are provided. A first wireless communication device identifies a first block-spreading code from a set of block-spreading codes associated with user multiplexing. The first wireless communication device communicates, with a second wireless communication device using a frequency interlace in a frequency spectrum, a first communication signal including a first block of information symbols spread across a set of resource blocks (RBs) within the frequency interlace based on the first block-spreading code. The first communication signal is generated by block-spreading the first block of information symbols based on the first block-spreading code to produce a first block of spread information symbols, performing a DFT on the first block of spread information symbols, and mapping the first block of spread information symbols to the set of RBs.

The invention discloses a physical random access channel false alarm avoidance method and a physical random access channel false alarm avoidance device, a reference signal symbol and a lead code sequence of a physical random access channel (PRACH) may have position overlap, and when the lead code sequence of the physical random access channel (PRACH) overlapped with the reference signal symbol is subjected to energy combination, the position of the lead code sequence of the physical random access channel (PRACH) is not overlapped with the position of the reference signal symbol. In order to solve the problem that a false alarm phenomenon is easily caused, the method comprises the following steps: in a detection process of a physical random access channel (PRACH), firstly, determining a lead code sequence of the physical random access channel (PRACH) which is not overlapped with a reference signal symbol; and then performing energy merging on the lead code sequence. Therefore, energy combination of the lead code sequence of the physical random access channel PRACH overlapped with the reference signal symbol is avoided, a false alarm avoidance scheme of the PRACH channel is realized, and the false alarm probability of the PRACH channel is reduced.

A user equipment, UE, comprising: means for initializing a scrambling sequence based on a virtual serving cell identifier that is distinct from a serving cell identifier of a serving base station; means for scrambling data using the scrambling sequence; and means for transmitting the scrambled data on a physical uplink shared channel, PUSCH as well as a corresponding method and a corresponding computer product.

The invention discloses a method and a system for constructing a collision-zone-free frequency hopping sequence set in a '1 + M' form, and mainly solves the problems that in the prior art, frequency point collision is generated when time delay deviation is large, and new collision is introduced in a secondary mapping or expansion process. The implementation scheme of the method comprises the following steps: generating two frequency hopping sequence set sums with different collision-free regions by adopting a collision-free region construction method; combining the two sequence sets to obtain 1 + M frequency hopping sequences; segmenting 1 + M frequency hopping sequences according to a set length to obtain sequence segments of the first sequence; setting random numbers which are uniformly distributed between 0 and 1, and constructing a zeroth dynamic frequency slot set and a first dynamic frequency slot set by utilizing the sum of the frequency slot sets, the size of the total frequency slot set and the sum of frequency slot elements in the total frequency slot set; and performing frequency slot mapping by using the sum sequence segment to obtain a collision-zone-free frequency hopping sequence set consisting of 1 + M frequency hopping sequences. According to the method, effective expansion of the collision-free area can be realized while the consistency of the sequence structure is kept, and the method can be used for orthogonal frequency hopping networking when the relative time delay difference between users is relatively large.

A receiving device is disclosed that receives a non-EHT PPDU that includes a service field and that is sent by a sending device, where the service field includes a first field whose bit quantity is m, and m≥1; and the receiving device determines, based on the first field, an initialization state of a scrambling code sequence corresponding to an extremely-high throughput physical layer protocol data unit EHT PPDU, where a bit quantity of the initialization state of the scrambling code sequence is greater than the bit quantity of the first field.

A PPDU-based communication method and an apparatus are applicable to a wireless local area network system that supports an 802.15 standard, for example, 802.15.4a, 802.15.4z, 802.15.4ab, a next-generation protocol of 802.15.4a, 802.15.4z, or 802.15.4ab, or 802.11 series protocols such as a next generation of 802.11 be like Wi-Fi 8, or may be applied to a UWB-based wireless personal area network system, a sensing sensing system, or the like. The method includes: A transmit end generates a PPDU based on a mapping relationship between a data symbol and a chip sequence, and sends the PPDU; and correspondingly, a receive end receives the PPDU, and then processes the PPDU based on the mapping relationship, where a minimum Hamming distance is greater than or equal to L / 2. The minimum Hamming distance is increased, so that a bit error rate is reduced effectively.

Various additional and alternative aspects are described herein. In some aspects, the present disclosure provides a method of communication by an apparatus. The method includes selecting one or more resources for transmitting data of a first data stream based on an acyclic graph. The selected resources conform to the acyclic graph comprising data streams at odd levels of the acyclic graph and resources at even levels of the acyclic graph. The acyclic graph includes edges between each level of the acyclic graph. The edges connect the resources allocated to each data stream. The method further includes transmitting the data of the first data stream on the selected one or more resources.

In distributor and assembly bank of a transmitter a predetermined quantity of an input payload from a source is repeatedly written according to a first distributor permutation to create as many input vectors as there are electromagnetic propagation pathways. Into a staging bank each input vector available from the assembly bank are repeatedly written according to a second distributor permutation. A presentation bank exists into which each input vector available from the staging bank are repeatedly written according to a third distributor permutation. One or more encoders repeatedly encode input vectors from the presentation bank; there being as many encoders as electromagnetic propagation pathways; each encoder makes available each encoded series of output levels for communication over the pathways. The banks and encoders are in up to four timing domains. A corresponding receiver, decoder, and reception, staging and disassembly banks and a sink are at the end of the pathways.

The present invention provides a method, device and electronic equipment for generating a scrambling code of a wideband code division multiple access system, and relates to the field of communication technology. The method comprises: determining a real part index value according to a maximum scrambling code number and a frame length of a downlink scrambling code, wherein the downlink scrambling code is a downlink scrambling code in a wideband code division multiple access (WCDMA) system; determining an imaginary part index value according to the maximum scrambling code number, the frame length and an M value of the downlink scrambling code, wherein the M value is a constant value in the WCDMA system protocol; generating a real part of the scrambling code according to the scrambling code number and the real part index value; generating an imaginary part of the scrambling code according to the scrambling code number and the imaginary part index value; and obtaining a target scrambling code according to the real part and the imaginary part of the scrambling code. The method achieves rapid generation of a downlink scrambling code sequence, reduces cyclic calculations and unnecessary storage, and saves storage resources.

This device is an Ambient Internet of Things (A-IoT) device, and is provided with: a control unit for determining a spread code, if multiplexing using a spread code is performed; and a communication unit for transmitting a spread signal obtained by spreading a signal using the spread code.

This application provides a communication method, a communication device, a computer-readable storage medium, a chip, and a computer program product. The communication method includes: determining a first matrix based on a quantity of active terminal devices in a plurality of terminal devices or a quantity of the plurality of terminal devices. The communication method further includes: determining a first sequence based on the first matrix, a probability distribution of to-be-sent data of the plurality of terminal devices, and a predetermined length of the first sequence associated with the plurality of terminal devices. The communication method further includes: performing spreading on modulated data by using the first sequence. The communication method includes: sending spread modulated data to a network device. In the method, sparseness of the active terminal device is used, so that channel decoding complexity can be reduced in a scenario in which the quantity of potential terminal devices is large and the quantity of active terminal devices is small.

A random access method based on binary subspace chirp codes and generalized approximate message passing on a fast fading channel is applicable to fast fading channel scenarios. The method comprises: firstly, setting the symmetric matrix and vector constituting the binary chirp part to 0 to obtain a new codeword construction formula; then, based on the principle that the subspace has no intersection except the zero vector, selecting matrices constituting the subspace; substituting the matrices constituting the subspace into the new codeword construction formula to obtain a new codebook; then, allocating the new codebook to users as a transmitted signal; then, transmitting the received signal through the fast fading channel; and executing a generalized approximate message passing algorithm to estimate active users; iterating at the receiving end; and finally, judging the termination of iteration based on the active user set and the number of iterations to obtain an estimated active user set. The present invention reduces computational complexity while also reducing the missed detection rate.

The application provides a method and device for information transmission, the method comprising: a terminal device sending a sequence belonging to a first sequence set to a network device, the sequences in the first sequence set being related to each other; and the network device performing sequence detection on a received signal according to the first sequence set to obtain at least one sequence sent by at least one terminal device. Meanwhile, the application also provides a sequence generation method for sequence modulation and an example of a first sequence set comprising sequences of different lengths, so that more sequences can be provided under the condition of a certain length, thereby supporting more users. The method and device of the application can realize access and information transmission of a large number of users under the premise of ensuring detection effect by simultaneously performing user detection and sequence detection by using non-orthogonal sequences with less correlation in the field of signal processing.