摘要
TD-SCDMA结合了TDD模式和CDMA技术的特点,是第三代移动通信的三大主流标准之一。TD-SCDMA系统是干扰受限系统,系统主要干扰包括多径干扰、小区内多用户干扰和小区间干扰。这些干扰破坏了各信道的正交性,降低了系统的频率利用率。作为TD-SCDMA系统的关键技术之一的联合检测技术把所有干扰用户当作有用信号处理,充分利用了用户信号的扩频码、幅度、定时、延迟等信息,大幅度降低了多径与多址干扰。本文主要研究TD-SCDMA系统中基于信道估计的联合检测技术。首先介绍联合检测的原理,其次分析联合检测的系统模型及算法,最后通过Matlab软件仿真分析总结了联合检测技术的优点。
TD-SCDMA combines CDMA technology TDD patterns and characteristics of third generation mobile communications,one of the three main criteria.TD-SCDMA system is interference limited system,the system main interference include multi-path interference,residential district within the multi-user interference and intersymbol interference.These disrupt the orthogonality of each channel,reduced the frequency of utilization of the system.As TD-SCDMA system,one of the key technologies for the joint detection of all interference with the user as a useful signal processing,make full use of the user signal spreading code,amplitude,timing,delay and other information,a significant reduction in the multi-path and multi-MAI.This paper studies the TD-SCDMA system,channel estimation based on the joint detection techniques.This paper introduces the principle of joint detection,followed by analysis of the system model and the joint detection algorithm,in the final summary of the advantages of joint detection techniques.
出处
《信息通信技术》
2010年第6期40-44,共5页
Information and communications Technologies
