Performance Analysis of Fixed-Point Simulations on cdma2000-1x Downlink

cdma2000-1x下行链路定点仿真研究(英文)

Based on the physical layer standard of cdma2000, the performance analysis of fixed point simulations is presented in this paper on cdma2000 1x downlink. The effects of quantization and finite wordlength, which have typically been assumed negligible in floating point simulations, become significant for fixed point simulations. The complete fixed point simulation platform for cdma2000 1x downlink is developed by EDA tool - COSSAP. The structure and performance of the key component in cdma2000 systems, the RAKE receiver, are discussed in details. Comparisons of results between floating point and fixed point simulations lead to some important conclusions, which provide certain references for the implementation of practical systems.

本文依据cdma2 0 0 0物理层标准 ,以浮点仿真为基础 ,建立了cdma2 0 0 0 1x下行链路的定点仿真平台 ,重点研究了定点化处理对于RAKE接收机和Viterbi译码器性能的影响 ,并且将仿真结果进行了比较和分析 。