7 results about "Golay sequence" patented technology

The embodiment of the invention provides a communication method and device, which are used for reducing the detection complexity while ensuring the detection performance of a PSS (Power System Stabilizer). According to the embodiment of the invention, the synchronization signal is generated based on the generalized Golay sequence, or the sequence used by the synchronization signal in the embodiment of the invention can be the generalized Golay sequence. A generalized Golay sequence element value set is {1,-1} and has a nested structure, and multiplication complexity required by related detection can be converted into addition complexity during detection, so that the detection complexity can be reduced. Moreover, the anti-frequency offset capability is generally evaluated by a fuzzy function sidelobe value, and the larger the fuzzy function sidelobe value is, the weaker the sequence anti-frequency offset capability is. In order to ensure the anti-frequency offset capability of the synchronization signal, the sidelobe value of the self-ambiguity function of the sequence used by the synchronization signal in the embodiment of the invention is relatively small, so that the anti-frequency offset capability of the synchronization signal is relatively strong, and the detection performance of the synchronization signal can be ensured.

Various aspects of the present disclosure relate to an enhanced synchronization signal block (SSB) structure or design for 6G radio access technologies and other access technologies. For example, the present disclosure introduces SSBs that carry secondary synchronization signals SSSs constructed using complementary Golay pairs. A transmitter may generate multiple Golay sequences and map the sequences to the SSS symbols of the SSBs. For adjacent SSSs, the Golay sequences may be complementary Golay pairs, where there is a base Golay sequence and a complementary Golay sequence that results in a periodic or an aperiodic autocorrelation sum being zero (or close to zero), among other criteria.

The invention discloses a signal generation and array calibration method and system, and the method comprises the steps: generating a two-dimensional signal frame structure main body and an active subcarrier position of each OFDM symbol in the main body, and enabling the active subcarrier positions of the OFDM symbols on different channel indexes under the same time index to be mutually staggered; the active subcarrier positions of the OFDM symbols on all the time indexes under any channel index cover a group of preset working frequency points; generating all OFDM symbols in the main body based on a Golay sequence of which the length is equal to the number of active subcarriers of the OFDM symbols; time slots are distributed for the OFDM symbols, a two-dimensional signal frame is generated, and the OFDM symbols with different channel indexes in the same time slot have the same time index. According to the invention, the number of frequency points working at the same time can be flexibly set, and the peak-to-average power ratio characteristic of the generated OFDM signal is close to a sine wave. When array calibration is carried out based on the two-dimensional signal frame, parallel measurement of multiple frequency points and multiple channels can be realized, the calibration efficiency of a broadband large-scale array is effectively improved, and the precision of long-distance calibration is guaranteed.

This application provides a communication method and a related apparatus, to reduce a quantity of bit storage units needed when correlation detection is performed on a preamble, a postamble, or a mid-amble. The method includes: A first device determines a first signal based on a first sequence and sends the first signal, where the first sequence and a first generalized Golay sequence meet a preset relationship, an n-level register is configured to generate the first generalized Golay sequence, a storage depth of a kth-level register in the n-level register is (I), a value of Pk is an integer from 0 to n-1, and a value of Pn is n-1; when i≄j, Pi≠Pj, where values of i and j are integers from 0 to n-1; and a value of k is any integer from 1 to n, n is a positive integer, a length of the first sequence is N, and N=2n. The first device receives the first signal, detects the first signal by using 1st-level to (n-1)th-level registers in the n-level register, and determines a start location and / or an end location of the first sequence in the first signal.

An information indication method and apparatus, and a communication device are provided. The method includes: a first STA sends to one or more second STAs at least one of first information, second information and third information. The first information is used for indicating a space-time stream sequence number of a Golay sequence used by a sensing PPDU, the second information is used for indicating a type of the sensing PPDU, and the third information is used for indicating a sensing field type used by the sensing PPDU.

A wireless communication method and related apparatus are provided in embodiments of the present disclosure. A first node obtains a first / 2 BPSK Golay sequence based on a first Golay sequence. The first / 2 BPSK Golay sequence is a sequence of a first / 2 BPSK Golay complementary pair (GCP), the first Golay sequence is a sequence of a first GCP, and the first / 2 BPSK GCP is a GCP or a quasi GCP. The first node transmits a reference signal based on the first / 2 BPSK Golay sequence. The first / 2 BPSK Golay sequence combines the / 2 BPSK technique and the Golay sequence, hence good auto-correlation property of the first / 2 BPSK Golay sequence is guaranteed, making it possible for the first node to transmit the reference signal with low peak to average power ration (PAPR).

Provided in embodiments of the present application are a signal transmission method and apparatus, for use in reducing the detection complexity while ensuring the PSS detection performance. In the embodiments of the present application, a synchronization signal is generated on the basis of a generalized Golay sequence, or a sequence used by the synchronization signal may be the generalized Golay sequence. The elements of the generalized Golay sequence take values from the set {1, -1} and the generalized Golay sequence has a nested structure, and multiplication complexity required for related detection can be converted into addition complexity during detection, thereby reducing the detection complexity. In addition, an anti-frequency offset capability is generally evaluated on the basis of an ambiguity function sidelobe level, wherein the higher the ambiguity function sidelobe level, the lower the anti-frequency offset capability of a sequence. To ensure the anti-frequency offset capability of the synchronization signal, in the embodiments of the present application, an auto-ambiguity function sidelobe level of a sequence used by the synchronization signal is low, so that the synchronization signal has a strong anti-frequency offset capability, thereby ensuring the synchronization signal detection performance.