Transmission diversity method based on null-frequency encode
A space-frequency coding and transmit diversity technology, applied in multi-frequency code systems, through diversity reception to prevent/detect errors, etc., can solve the problems of increasing the bit error rate, punching, reducing the performance of space-frequency codes, etc., to improve reliability. performance, preventing data loss
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[0020] Suppose the data of a certain user to be transmitted is S=[s 1 ,s 2 ,s 3 ,s 4 ,...,s N ], the number of transmit antennas is 2M (M>1), and the transmit diversity method based on space-frequency coding is as follows figure 1 shown, including the following steps:
[0021] Step 110, the transmitter performs SFBC encoding of the Alamouti scheme on the data after channel encoding and constellation map mapping to obtain two data streams:
[0022] [ S 1 , S 2 , S 3 , S 4 , · · · S N - 1 , S N ] → ...
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