TDS-OFDMA系统的Simulink仿真  

Simulink Simulation of TDS-OFDMA System

作　　者：刘振玉[1] 杨昉[1] 邹强[1] 

机构地区：[1]清华信息科学与技术国家实验室微波与数字通信国家重点实验室清华大学微电子学研究所,北京100084

出　　处：《电视技术》2011年第4期13-16,共4页Video Engineering

基　　金：清华大学自主科研计划(20091081280)

摘　　要：搭建了TDS-OFDMA系统的Simulink仿真平台。仿真系统采用基于SNR门限的子带自适应编码调制算法(SBLA),根据各用户子带的信道估计结果自适应地选择编码速率和调制方式,进而在保证BER性能的情况下获得更高的传输吞吐率。仿真表明,该多址接入系统可以支持40个用户同时进行信息传输,最大净荷速率达到40.8 Mbit/s。在各种编码调制模式下,本系统的SNR门限性能与DTMB单用户系统相当,而且自适应编码调制的OFDM系统可获得更好的BER性能。In this paper, the platform of Simulink model for the TDS-OFDMA system with adaptive modulation coded is established. The simulated system adopts adaptive coded modulation techniques-simple block loading algorithm （SBLA）, where the channel state information from channel estimation is used to determine the transmission parameters, consequently the BER performance is guaranteed while higher throughput is achieved. The simulation results demonstrated that the multiple access system can support up to 40 simultaneous users with maximum payload rate up to 40.8 Mbit/s. Also, the SNR threshold of TDS-OFDMA system is the same as that of single-user DTMB system while the BER performance is improved by the technique of adaptive modulation and coding.

关 键 词：时域同步正交频分复用 TDMA 自适应编码调制 SIMULINK 

分 类 号：TN911.8[电子电信—通信与信息系统]