基于平方法的多用户空时分组编码系统

International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003 Pub Date : 1900-01-01 DOI:10.1109/ICNNSP.2003.1281147

Yinggang Du, K.T. Chan

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引用次数: 3

摘要

提出了一种基于平方法的瑞利平衰落信道多用户正交空时分组编码系统。将多用户解调器中的软干扰抑制与接收机中的迭代MAP解码算法相结合，并引入平方法，通过将软码矢量加倍来消除接收信号与路径增益的共轭，该方法适用于所有正交STBC设计。由于传输矩阵中约有一半的元素为0，计算复杂度保持不变。利用导频符号对信道失配进行了研究。仿真结果验证了该方法的有效性。与其他类似技术相比，在相同的迭代时间内获得了大约1dB的信噪比改进。在相同的误码率下，信道失配导致约1dB信噪比损失。

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A multiuser space-time block coding system with squaring method

A multiuser orthogonal space-time block coding (STBC) system in a Rayleigh flat-fading channel with a squaring method is proposed. Soft interference suppression in the multiuser demodulator is combined with the iterative MAP decoding algorithm in the receiver and a squaring method is introduced to eliminate the need to conjugate the received signals and the path gains by doubling the soft code vector, which is fit for all orthogonal STBC designs. The computation complexity keeps same because about half of the elements in the transmission matrix are 0. The channel mismatch has also been studied using pilot symbols. The simulation results confirm the validity of the proposed squaring method. About 1dB SNR improvement over otherwise similar techniques has been obtained with same iteration times. The channel mismatch leads to about 1dB SNR loss at the same BER performance.

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International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003

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