The invention discloses an improved orthogonal multi-user differential
chaotic communication
system, and belongs to the field of communication systems. Reference signals and information signals are separated by replacing traditional
time division multiple access with I / Q modulation, so that the
transmission rate is increased, and the problem of
radio frequency delay is solved; in order to furtherimprove the
transmission rate, Hilbert transform and Walsh codes are combined to transmit 2N
user information. The receiving end multiplies the received information
signal by the corresponding sine and cosine carriers by adopting a non-correlation
demodulation mode, and then respectively sends the obtained signals to a
matched filter so as to respectively demodulate an information
estimation signal and a reference
estimation signal. After I / Q
demodulation, correlation operation is performed on the reference
estimation signal, the information estimation signal and the corresponding Walsh code to demodulate the first N
user information; and meanwhile, the same operation is executed on the reference estimation signal and the information estimation signal after the Hilbert transform to demodulate the N
user information. Compared with a traditional multi-user
chaotic communication
system, the scheme has more excellent performance, so that the scheme has a good application prospect in the field of
wireless communication.