In high frequency high data rate transmission (HF-HDRT) systems, the intersymbol interference and deep fading of ionosphere channel seriously hindered the improvement of data transmission rate. In order to solve these...
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ISBN:
(纸本)9781479966370
In high frequency high data rate transmission (HF-HDRT) systems, the intersymbol interference and deep fading of ionosphere channel seriously hindered the improvement of data transmission rate. In order to solve these problems, a novel frequency domain iterative combining-equalization (FD-ice) algorithm based on minimum mean square error (MMSE) criterion is proposed, which can realize diversity combining and equalization simultaneously, and iteratively exchange log-likelihood ratio values between soft-input soft-output (SISO) decoder and SISO combining-equalizer. Moreover, a simplified method fast frequency domain iterative combining-equalization (ffd-ice) with low performance loss is given. Simulation results show that the proposed FD-icealgorithm can provide a much better performance especially when more antennas are used and the low-complexity ffd-ice algorithm can achieve an excellent trade off between complexity and performance. Both of the FD-ice and the simplified ffd-icealgorithm converge faster than the conventional iterative equalization.
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