TD—SCDMA系统随机接入性能分析

随机接入过程的性能好坏是衡量一个系统性能好坏的标准之一，首先给出3GPP上所规定的随定接入的完整过程并进行解释，然后通过仿真给出了3GPP文档上所描述的随机接入过程中的性能，同时，作者发现该随机接入过程中有些可以改进的地方，提出了2个改进意见，并且按照改进意见对改进后的随机接入过程进行了仿真，通过将采用改进意见的随机接入规程的性能的仿真结果与3GPP所描述的随机接入规程性能的仿真结果进行比较，所提出的改进意见对系统性能的改善是比较大的，有助于形成对TD－SCDMA系统随机接入规程的建议。

RACH Performance Analysis in TD-SCDMA

Whether RACH(Random access channel)performance is good or not is one of the main criteria to judge whether a system is good or not. So this article analyzes by simulation the performance of RACH process for TD SCDMA system, illustrates the RACH process according to 3GPP document. Then the authors give system performance simulation results of RACH process subscribed by 3GPP document and find out that there are some places for this RACH process to improve,therfore authors offer tow pieces of advice and simulate these improved RACH process. By comparison of simulation results of the improved RACH process with RACH process according to 3GPP document, the authors point out that the advice for system improvement will result in better system performance. The advice for improvements will help to implement the RACH process for TD SCDMA system.