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Soft Decision Decoder, Apparatus of Generalized Log Likelihood Ratio considered Channel Estimation Errors for Soft Decision Decoding at QAM Signals and method thereof
Soft Decision Decoder, Apparatus of Generalized Log Likelihood Ratio considered Channel Estimation Errors for Soft Decision Decoding at QAM Signals and method thereof
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机译：软判决解码器，考虑对数估计误差的信道估计误差的广义对数似然比装置及其方法
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摘要
The present invention is quadrature amplitude modulation (QAM) soft decision decoder for implementing a generalized logarithm likelihood ratio algorithm considering a soft decision decoding upon a channel estimation error to improve the performance of the signal, and a soft decision decoding during the logarithmic likelihood ratio calculation unit and that It relates to a method.; First and second squared to the present invention embodiment, each square of the reference signal and a subtractor, the subtractor output signal and a reference signal for channel estimation signal for subtracting the received signal of the output signal and a reception terminal of a multiplier, the multiplier which multiplies in accordance with the To this and a divider, a comparator for comparing an output signal of the divider that divides the output signal of the group, the first and second squarer.; Accordingly, the present invention reflects the channel estimation error by using the algebraic generalized likelihood ratio is the soft decision signal decoding made and the received signal decoding performance improved over the best signal reconstruction, and also provides a difference in the signal-to-noise ratio can be improved .
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