This application relates to the field of communications technologies, and discloses a data transmission method. The method includes: generating a PPDU; and transmitting the PPDU to at least one receive end. The PPDU includes a channel estimation field CEF, and the CEF includes a plurality of sub-sequences. For each of the plurality of sub-sequences, a part or all of elements in the sub-sequence are basic elements, and the basic elements are arranged into a Golay sequence or a ZC sequence in the sub-sequence. This application is used for data transmission.

Disclosed are a method for a station for transmitting and receiving a signal in a wireless local area network (WLAN) system, and an apparatus for the method. More specifically, disclosed are a method for transmitting and receiving a signal and an apparatus for the method, the method, when a station transmits and receives a signal by means of a channel in which three channels have been bonded, generating an enhanced directional multi gigabit (EDMG) short training field (STF) for an orthogonal frequency division multiplexing (OFDM) packet, and transmitting and receiving a signal comprising the generated EDMG STF field.

An apparatus of a transmitter may include, for example, a Golay builder to build modulated Golay sequences for at least a non-EDMG Short Training Field (L-STF), and a non-EDMG Channel Estimation Field (L-CEF) of a PPDU; a scrambler to generate scrambled bits by scrambling bits of a non-EDMG header (L-header) and a data field of the PPDU; an encoder to encode the scrambled bits into encoded bits according to a low-density parity-check (LDDC) code; a constellation mapper to map the encoded bits into a stream of constellation points according to a constellation scheme; a spreader to spread the stream of constellation points according to a Golay sequence; and a transmit chain mapper to map a bit stream output from the Golay builder and the spreader to a plurality of transmit chains by applying a spatial expansion with relative cyclic shift over the plurality of transmit chains.

In this application, a manner of generating a modulated field STF is enriched, so that a manner of generating a PPDU is enriched, thereby improving data transmission flexibility. The method includes: After generating a PPDU, a transmit end sends the PPDU to at least one receive end, where the PPDU includes at least one modulated field STF, the modulated field STF includes a plurality of zero elements and a plurality of non-zero elements, m1 zero elements are included before a first non-zero element, m2 zero elements are included after a last non-zero element, m1+m2 zero elements are included between any two adjacent non-zero elements, m1 and m2 both are positive integers, and the modulated field STF is mapped to a plurality of consecutive subcarriers for transmission. This application is used for data transmission.

Apparatus and methods are disclosed for determining, at a radar device, range and Doppler velocity based on reduced Doppler-induced radar range sidelobes, including generating code sequence pairs such that a sum of autocorrelations of each code sequence pair has substantially no sidelobes, transmitting a plurality of pulses in an emitted burst, where each pulse of the emitted burst comprises a code sequence pair different from at least one other pulse of the burst such that the autocorrelation sum of the code sequence pairs of the two different pulses has sidelobes, receiving pulses in a reflected burst, each pulse a reflected copy of a corresponding pulse of the emitted burst, generating an autocorrelation sum for each reflected pulse with its corresponding emitted pulse, and determining range and Doppler velocity based on autocorrelation sums, where the sidelobes autocorrelation sums combine incoherently at reduced power.

A new layer tailored for Artificial Intelligence-based communication systems to limit the instantaneous peak power for the signals that relies on manipulation of complementary sequences through neural networks. Disclosed is a method for providing non-linear distortion in end-to-end learning communication systems, the communication system comprising a transmitter and a receiver. The method includes mapping transmitted information bits to an input of a first neural network; controlling, by an output of the neural network, parameters of a complementary sequence (CS) encoder, producing an encoded CS; transmitting the encoded CS through an orthogonal frequency division multiplexing (OFDM) signal; processing, by Discrete Fourier Transform (DFT), the encoded CS, to produce a received information signal in a frequency domain; and processing, by a second neural network, the received information signal.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention relates to a method and apparatus for channel estimation in a wireless communication system. A method for operating a transmitter comprises the operations of: transmitting a first reference signal through a first antenna; and transmitting a second reference signal through a second antenna, wherein the first reference signal includes a first Golay sequence, and the second reference signal includes a second Golay sequence.

This disclosure describes methods, apparatus, and systems to increase the transmission data rate in wireless networks, for example, by using one or more Multiple Input Multiple Output (MIMO) and/or channel bonding techniques. In one embodiment, the disclosure describes the use of Golay Sequence Sets (GSS) to define guard intervals (GIs) for single carrier (SC) single channel bonding and multiple input multiple output (MIMO) transmission. In various embodiments, the disclosure describes the design of guard interval sequence for 3 types of guard intervals having lengths that can be classified as short, medium, and long. In another embodiment, the disclosure defines the guard interval for single channel transmission channel bonding and for MIMO transmission.

The present disclosure relates to beam training sequence design methods and apparatus. One example method includes generating N.sub.T beam training sequences, where each beam training sequence includes a cyclic prefix and (2N) Golay sequences, each Golay sequence is with a length of L, and the N.sub.T beam training sequences are orthogonal to each other, and sending the N.sub.T beam training sequences using N.sub.T transmit antennas, where each transmit antenna of the N.sub.T transmit antennas sends one beam training sequence of the N.sub.T beam training sequences.

Some demonstrative embodiments include apparatus, system and method of communicating a transmission according to a symbol block structure and Guard Interval (GI) scheme. For example, an apparatus may include logic and circuitry configured to cause a wireless station to generate a plurality of Single Carrier (SC) blocks according to a SC block structure corresponding to a GI type of a plurality of GI types, a SC block of the plurality of SC blocks including a GI followed by a data block, the GI including a Golay sequence having a length based at least on the GI type, a length of the data block is based at least on the GI type; and to transmit a SC transmission over a millimeter Wave (mmWave) frequency band based on the plurality of SC blocks.