Spread spectrum communication method and spread spectrum communication device based on two-dimensional baseband direct sequence spread spectrum

The invention provides a spread spectrum communication method and a spread spectrum communication device based on two-dimensional baseband direct sequence spread spectrum. A baseband transmission part contains two first and second parallel direct sequence spread spectrum transmission branches, wherein a spread spectrum code sequence adopted by second branch spread spectrum modulation is Hilbert transform of the spread spectrum code sequence adopted by first branch spread spectrum modulation, or a forming function used for forming a second branch baseband is the Hilbert transform of the forming function used for forming a first branch baseband, and first and second branch spread spectrum modulation signals are output after being superposed; and a receiving end adopts a matched filtering method to carry out non-interference demodulation on the received signals. The communication method and the communication device provided by the invention can be used for spreading the spatial dimension of a baseband signal of a traditional direct sequence spread spectrum communication system from 1 to 2, so that the communication capacity and the communication rate are doubled, and the potential application fields comprise military satellite communication, confidential radio communication, Beidou satellite navigation communication systems, etc.