Data transmission processing method and apparatus, communication device, and storage medium

A data transmission processing method, comprising:

• receiving, by a receive end, a target data signal;
• performing, by the receive end, preprocessing on the target data signal, to obtain a target time domain signal;
• performing, by the receive end, discrete Fourier transform on the target time domain signal to obtain a data matrix;
• and
• performing, by the receive end by using an orthogonal sequence, inverse spectrum spreading processing on the data matrix to obtain a received signal in a case that the target data signal is a first data signal, wherein
• the data matrix is an orthogonal data matrix in a case that the target data signal is the first data signal;
• wherein after the performing, by the receive end by using an orthogonal sequence, inverse spectrum spreading processing on the data matrix to obtain a received signal, the method further comprises:
• performing, by the receive end, direction of arrival (DoA) detection on the received signal, to obtain a target DoA;
• performing, by the receive end according to the target DoA, receiving beamforming processing, to obtain a received matrix signal;
• and
• calculate, by the receive end by using an OFDM radar algorithm, the received matrix signal, to obtain a range and a Doppler frequency shift.

A communication device, comprising:

• a memory, a processor, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, causes the communication device to perform:
• performing spectrum spreading on to-be-transmitted data through K orthogonal sequences, to obtain K orthogonal data matrices, wherein K is an integer greater than 1;
• mapping the K orthogonal data matrices onto different frequency division multiplexing (OFDM) subcarriers, to obtain K first OFDM signals, wherein the first OFDM signals are spectrum spreading data matrix OFDM signals;
• performing inverse fast Fourier transform (IFFT) processing on a kth first OFDM signal among the K first OFDM signals, to obtain a kth first OFDM time domain signal, wherein k is a positive integer less than or equal to K;
• and
• mapping the kth first OFDM time domain signal onto a kth transmit antenna, and transmitting a first data signal through the kth transmit antenna;
• wherein the performing, by a transmit end, spectrum spreading on to-be-transmitted data through K orthogonal sequences, to obtain K orthogonal data matrices comprises:
• performing, by the transmit end, time-frequency domain spectrum spreading on the to-be-transmitted data through the K orthogonal sequences, to obtain the K orthogonal data matrices, wherein
• a rule of the time-frequency domain spectrum spreading meets any of the following:
• after time domain spectrum spreading is first performed on Kt OFDM symbols, frequency domain spectrum spreading is performed on Kf subcarriers, both Kt and Kf are positive integers, and a sum of Kt and Kf is greater than 2;
• and
• after frequency domain spectrum spreading is first performed on the Kf subcarriers, time domain spectrum spreading is performed on the Kt OFDM symbols, both Kt and Kf are positive integers, and the sum of Kt and Kf is greater than 2;
• wherein a length K′ of the orthogonal sequence meets:
• K′=KtKf, and K′≥K.