Phase shift keying signal blind detection method based on plural discrete full-feedback neural network
A neural network and phase shift keying technology, which is applied to the shaping network, phase modulation carrier system, baseband system components and other directions in the transmitter/receiver to achieve good results.
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[0019] Before going into details, some nouns, symbols and formulas used in the system are first defined:
[0020] P: channel order
[0021] L: equalizer order
[0022] N: the data length required by the algorithm of this scheme
[0023] q: oversampling factor
[0024] M: phase number of phase shift keying signal
[0025] (·) H : Hermitian transpose
[0026] (·) T :Matrix transpose
[0027] The idea of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0028] Definition 1 When the noise is neglected, the receiving equation of the discrete-time channel is defined as follows
[0029] x N =SΓ H (1)
[0030] Among them, the sending signal array S=[s L+P (k),...,s L+P (k+N-1)] T =[s N (k),...,s N (k-P-L)] N×(L+P+1) ,s L+P (k)=[s(k),...,s(k-L-P)] T ; Γ is determined by h jj , jj=0, 1,..., the block Toeplitz matrix composed of P, [h 0 ,...,h P ] q×(P+1) is the channel im...
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