【摘要】 我们提出了一种多符号网格码(MTCM)与差分空时分组码级连的传输方法,研究了在传输信道是慢时变平坦瑞利衰变的条件下,并采用理想交织时系统的性能。导出了这个级连系统的成对错误概率上限表达式,分析表明,系统的性能主要受到不同信号序列间的最小汉明矩离和信号星座间的平方欧几里德矩离的影响。仿真结果表明,在相同的频谱有效性和信号星座条件下,这种级连的系统比非级连差分空时编码系统有更好的性能。更多还原

【Abstract】 We present a transmission scheme of concatenating multiple symbols trellis code (MTCM) with differential space time block coding and study performance of the system under slowly time varing flat rayleigh fading with ideal interleaver. An upper bound is derived for the pairwise error probability of such concatenated system. It reveal that system performance is dominated by minimum Hanmming distance between different signal sequences and square Euclidean distance between signal constellation. Simulation results show that the concatenated system has better performance than unconcatenated differential space time coding under the same spectral efficiency and signal constellation.更多还原