Method for reducing peak-to-average power ratio of frequency domain forming OFDM (Orthogonal Frequency Division Multiplexing) without bandwidth expansion
A bandwidth expansion and peak-to-average ratio technology, applied in the field of communication, can solve the problems of reducing the spectrum utilization rate and power utilization rate of the communication system, occupying the signal bandwidth and transmission power of the communication system, and failing to meet the requirements of the peak-to-average ratio performance value, etc. Achieve the effect of improving power utilization, meeting the requirements of peak-to-average performance value, and low bit error rate
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[0028] Refer to attached figure 1 , further describe the implementation method of the present invention:
[0029] Step 1, serial-to-parallel conversion
[0030] The signal processor at the transmitting end performs serial-to-parallel conversion on the input signal to obtain a signal sequence transmitted in parallel. The signal sequence is in the form of an M-order matrix, and M is the length of the OFDM data symbol. In the embodiment of the present invention, the value of M is 1024.
[0031] Step 2, frequency domain precoding
[0032] 2a) Construct a precoding matrix. The signal processor multiplies two M-order diagonal matrix A and M-order square matrix Φ formed by different Chu sequences to obtain a precoding matrix, and A and Φ are respectively constructed according to the following formulas,
[0033]
[0034] Among them, A is the constructed diagonal matrix, e is the base of natural logarithm, j is the imaginary number unit, M is the length of OFDM data symbol, r is ...
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