Space Shift Keying Modulation and Demodulation Method for Binary Digital Signals in Multiple-Input and Multiple-Output Systems
A digital signal and space-shift keying technology, applied in transmission systems, digital transmission systems, phase-modulated carrier systems, etc., can solve problems such as the gap in spectral efficiency, the inability to arbitrarily adjust the number of transmit antennas and the number of streams transmitted at the same time, etc. Achieve the effect of low bit error rate performance, flexible modulation method and wide application range
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[0059] Here, the number of transmitting antennas is 7, and the number of receiving antennas is 4, that is, N t =7,N r =4 MIMO system as an example to illustrate:
[0060] Assume that the system transmits K=4 channels of data in total, and each channel of data contains b=2 bits, that is, the system sends data in groups of Kb=8 bits. Here it is assumed that the 8bit data sent is 11010110. First calculate the original antenna mapping number corresponding to the 4 channels of data. The calculation rule is to convert binary to decimal and add 1 to get n 1 = 4, n 2 = 2, n 3 = 2, n 4 =3. For the system of K=4, the modulation symbols adopt 4QAM symbols, that is, the modulation symbols of 4 antennas are
[0061] The first data stream modulation, first sort the 7 antennas Antenna number set A is {T 1 , T 2 , T 3 , T 4 , T 5 , T 6 , T 7},T 1 , T 2 , T 3 , T 4 , T 5 , T 6 , T 7 are the numbers of each antenna respectively. The set B of available antenna numbers i...
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