【摘要】 将纠错技术与扩频相结合，是进一步提高扩频多址通信系统性能的重要手段之一。本文研究了在正交码扩频通信系统中，应用ＴＣＭ（网格编码调制）的原理，通过对信号集的扩展和分割，使发送信号序列间的最小欧氏距离得以增加．性能分析和计算机模拟表明，在存在加性高斯白噪声和多址干扰的信道环境中，扩频通信系统的性能得到了显著的提高更多还原

【Abstract】 One of the important means to improve the performance of spread spectrum communication system is to combine error-correcting with spread-spectrum.In this paper,we discuss the advantages of applying TCM to the orthogonal code spread spectrum systems,which increase the minimum free Euclidean distance between the transmitted sequences by expanding and partitioning of the signal sets.Analysis and computer simulation show that the performance of the system in the channel with additive white Gaussian noise and multiple-access interference is markedly improved.更多还原