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根据TD-SCDMA码资源特点,在深入分析复合码循环相关特性的基础上,提出了归一化码字相关值的概念,作为衡量扰码互相干扰的相关特性值,以此为依据可以构建扰码对的互相关值评价矩阵。并在3GPP TS25.102协议给出的1.28 Mc/s TDD的三种多径衰落信道环境下,进行扰码规划算法的仿真测试。研究表明,TD-SCDMA系统的扰码间相关值越小系统性能越好。
Based on the characteristics of TD-SCDMA code resources, this paper proposes the concept of normalized correlation values of code words based on the analysis of the cyclic correlation characteristics of TD-SCDMA codes. As a measure of the correlation values of the mutual interference of scrambling codes, Cross-correlation evaluation of code pairs. And the simulation test of the scrambling code planning algorithm is carried out under the three multipath fading channel environments of 1.28 Mc / s TDD given in the 3GPP TS25.102 protocol. The research shows that the smaller the correlation value between TD-SCDMA systems is, the better the system performance is.