77results about "Multiplex code generation" patented technology

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.

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.

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.

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.

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.

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.

The present application provides a method and apparatus for transmitting a physical layer protocol data unit and a method and apparatus for receiving a physical layer protocol data unit. In this method, a sequence set having a zero correlation zone is constructed based on a Golay sequence pair having a zero correlation zone and a Golay sequence pair having low cross-correlation. The zero correlation zone sequences can sufficiently support sensing, measurement, and ranging. In addition, the sequences in the sequence set have low cross-correlation and can support multiple devices performing simultaneous transmission to reduce interference when multiple devices perform sensing or ranging simultaneously, thereby allowing sensing, measurement, and ranging to be performed more accurately.

The invention provides a joint degree distribution design and optimization method for fountain codes. The method comprises the steps of obtaining to-be-transmitted test data in a current scene; using to-be-transmitted test data to form an optimized joint degree distribution model by taking the minimum average decoding overhead as an optimization target under the joint degree distribution model; the joint degree distribution model is obtained by joint construction of probability distribution of modified Poisson distribution, probability distribution of ideal soliton distribution and probability distribution of sliding robust soliton distribution; based on the optimized joint degree distribution model, performing global optimal solution search processing on a to-be-optimized weight coefficient in the optimized joint degree distribution model by adopting a Monte Carlo simulation method and a double-layer nested search method to obtain a global optimal weight; and substituting the global optimal weight into the joint degree distribution model to obtain final fountain code joint degree distribution in the current scene. Therefore, the rationality of the degree distribution structure, the consistency of the optimization target and the system performance and the improvement of the global optimality of the design method are realized.

The invention provides an ISAC complementary sequence generation method and device, and relates to the technical field of communication perception integration, and the method comprises the steps: presetting a sequence length parameter which is a positive integer not less than 2; generating a constant modulus sequence with the length based on the length parameter; the permutation of the preset set is obtained, an initial complementary sequence is generated based on the constant modulus sequence and the permutation, and the initial complementary sequence A is composed of N subsequences {a0, a1,..., aN-1} with the length being N; presetting a sequence set size parameter which is a positive integer not less than 2, and selecting a P-order unitary matrix O; and expanding the initial complementary sequence based on the unitary matrix to generate a complementary sequence set. According to the method, the self-fuzzy function of the complementary sequence is in a drawing pin type, and zero cross-fuzzy function values exist among different complementary sequences.

According to an aspect of the present disclosure, provided is a method for transmitting and receiving a sensing signal in a new radio (NR) system, including: spreading a Zadoff-chu (ZC) code sequence into an orthogonal code in a transmitting device to generate a sensing code sequence; generating a sensing OFDM symbol by performing an OFDM (Orthogonal Frequency Division Multiplexing) transform on the sensing code sequence; and transmitting a communication symbol and the sensing OFDM symbol through a plurality of antennas. Embodiments of the present disclosure may generate and transmit a sensing signal for sensing an surrounding object and an environment, and efficiently reduce interference between sensing OFDM symbols when receiving the sensing signal.

A communication apparatus includes: storing means for storing information indicating a first base set including a first base sequence to an N-th base sequence; shifting means for generating a first shift sequence to an N-th shift sequence by determining a shift amount based on transmission data, and cyclic shifting an n-th base sequence (n being an integer from 1 to N) by the shift amount; holding means for holding timing information indicating transmission timings of sequences; and transmitting means for transmitting each shift sequence according to the timing information, wherein the first base sequence to the N-th base sequence satisfy a first condition of: a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is not 0 when a shift amount is 0, and a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is 0 when a shift amount is different from 0 used in data transmission.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

The disclosed techniques allow for transmitting a signal stream from a sender to a receiver in an environment including multiple senders and receivers. The technique for the sender decomposes a data stream from the sender into multiple substreams, encodes a substream by a codeword, further superimposes multiple codewords to form a signal stream in an asynchronous manner, and transmits the signal stream to the receiver. A codeword can span over multiple blocks. The receiver receives a first codeword stream from a first sender, receives a second codeword stream from a second sender, the two codeword streams may be received at the same time as one signal, and decodes the first codeword stream and second codeword stream over a sliding window of multiple blocks.

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives a signal in a certain channel, the signal being generated by carrying out processing for multiplexing a plurality of pieces of data before or after a specific physical layer processing; and a control unit that acquires a portion of the plurality of pieces of data by applying inverse processing of the processing to the signal. The one aspect of the present disclosure makes it possible to carry out a suitable multiple access scheme.

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 dynamic code loop phase discrimination method comprises: S1, obtaining a segment of received spread spectrum data required by a current epoch, and performing carrier frequency and phase compensation on the received spread spectrum data to obtain current epoch loop input data; S2, a control unit selects different code loop phase discrimination modes according to a scene or a loop state; S3, a local code generation unit generates multiple local spread spectrum codes; S4, a correlation unit completes multiple correlations of data and local spread spectrum codes, and a phase discrimination unit obtains a current epoch code loop phase discrimination value based on a correlation result; S5, a dynamic filtering unit dynamically adjusts filtering coefficients based on multiple correlation integrals of the correlation unit, dynamically filters the code loop phase discrimination value, and outputs a code phase; S6, a feedback unit converts the code phase into an offset sampling point and feeds back the offset sampling point to control selection of next epoch received spread spectrum data. The method can accurately perform code loop phase discrimination and accelerate code loop convergence in a multipath and non-multipath scene, improve reliability of signal tracking, and improve system reception performance.

This disclosure relates generally to wireless communications and, more particularly, to systems and methods for bit level processing to produce a scrambled data bit sequence that, after modulation, may produce a symbol sequence that matches a symbol sequence produced by symbol spreading. In one embodiment, a method performed by a communication device includes: encoding user data to produce a first data bit sequence; generating a result bit sequence based on a first scrambling bit sequence and the first data bit sequence; and transmitting a signal based on a scrambled data bit sequence scrambled with the result bit sequence.

The invention provides an ISAC sequence generation method and device, and relates to the technical field of communication perception integration, and the method comprises the steps: obtaining a sequence length N and a sequence set size M, N being an odd number, M being a positive integer, and M being less than or equal to N; according to the sequence length N and the sequence set size M, sequence generation processing is carried out, a sequence set is obtained, the sequence set comprises M sequences, the length of each sequence ui is N, and the value of a sequence element ui (n) is an exponential function of a unit root omega N of modulus N. The sequence set in the application has a similar thumbtack type fuzzy function. In communication, the designed sequence can be used as a pilot frequency sequence of multiple users to realize channel estimation or synchronization; in the radar, the designed sequence set can be used for target perception.

It is an object of the present invention to provide a communication device and a communication method that improve detection, channel estimation and interference suppression in a receiver, and to provide a corresponding computer program and a non-transitory computer-readable recording medium for implementing the communication method. [Solution] 11. A first communications device configured to transmit data to a second communications device, comprising: a circuit configured to generate a second number of mutually orthogonal sequences; generate one or more third number of spatial streams, each carrying payload data; divide each of a first number of training symbols, each spanning a plurality of tones, into a fourth number of tone sets; divide each orthogonal sequence into a fourth number of portions, generate a training field by mapping elements of corresponding portions of the orthogonal sequences to the tone sets of the training symbols; and place the training field before and / or between the payload data of the spatial streams to enable channel estimation by the second communications device.

A communication method may include a first apparatus that 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.

The ZC sequence packet multiplexing method comprises the following steps of: associating an AP (Access Point) and requesting STA packets for distributing ZC sequences, wherein the ZC sequences of each group of STAs are different, the ZC sequences of each group of STAs are the same, sending a PPDU (Protocol Data Unit) to the STAs, receiving ZC sequences which are sent by the STAs and are allowed to preempt a required STA in a TXOP packet, sending a TF (Trans Frequency) to the corresponding STAs according to the received ZC sequences, so that the corresponding STAs complete OFDMA (Orthogonal Frequency Division Multiple Access) according to an RU (Resource Unit) distributed by the AP, or the ZC sequences of each group of STAs are the same, and the ZC sequences of each group are different, and the PPDU is sent to the STAs. And receiving the ZC sequence sent by the STA with the demand, and sending the TF to the STA in the TXOP packet allowed to be preempted according to the received ZC sequence, so that the STA which is allowed to preempt the TXOP packet and has the low-delay data sending demand performs UORA, and the RU is preempted to complete OFDMA (Orthogonal Frequency Division Multiple Access). The problem that the number of ZC sequences does not meet the requirement of access equipment is solved, and the effect of meeting the requirement of multi-equipment access is achieved.

Techniques for transmitting pilot and traffic data are described. In one aspect, a terminal may scramble its pilot with a scrambling sequence generated based on a set of static and dynamic parameters. The static parameter(s) have fixed value for an entire communication session for the terminal. The dynamic parameter(s) have variable value during the communication session. The terminal may generate a scrambling sequence by hashing the set of parameters to obtain a seed and initializing a PN generator with the seed. The terminal may then generate the pilot based on the scrambling sequence. In another aspect, the terminal may use different scrambling sequences for pilot and traffic data. A first scrambling sequence may be generated based on a first set of parameters and used to generate the pilot. A second scrambling sequence may be generated based on a second set of parameters and used to scramble traffic data.

A method for generating spread spectrum spreading sequences in communicating devices. A first device receives a first sequence of one or more radio frequency (RF) signals from a second device, sends a second sequence of one or more RF signals to the second device, samples the first sequence of one or more RF signals, generates sampling results, and generates a spreading sequence based on the sampling results. The second device receives the second sequence and creates an identical spreading sequence using an identical process to create sampling results and generate the sequence. The spreading sequence may be used by the first and second devices for spread spectrum communications with each other. Gain for spread spectrum communications may be dynamically varied based on available bandwidth by varying the number of RF signals and sampling rate.