Approximate minimum bit error rate (BER) power distribution method for hybrid carrier system
A technology of mixed carrier system and distribution method, applied in transmission system, distribution standard, digital transmission system, etc., can solve problems such as BER performance deterioration and system reachable rate reduction
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[0027] Specific implementation mode 1. Combination Figures 1 to 4 Describe this specific implementation mode, the approximate minimum bit error rate power allocation method of the mixed carrier system, and the specific implementation steps are as follows:
[0028] Step 1. Perform α-order weighted fractional Fourier transform on the data in each frequency band at the transmitting end to obtain data in the frequency domain;
[0029] Step 2. Perform power allocation operation on the data in the frequency domain. The matrix P is a diagonal matrix, and the elements on the diagonal are [P] i,i =p i , the power allocated to the i-th subcarrier is And the total power allocated is certain, satisfying Where N is the number of modulated subcarriers, and the power allocation matrix obeys the following formula,
[0030]
[0031] Among them: E[·] represents the mean value operation, λ i is the channel parameter;
[0032] Step 3, performing IFFT transformation on the obtained dat...
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