802.11n单流基带系统研究  

The research of 802.11n 1-stream baseband system

作　　者：吴斌[1] 周玉梅[1] 姜鑫[2] 朱勇旭[1] 张振东[1] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]电子科技大学,四川成都610054

出　　处：《电子技术应用》2010年第4期94-98,102,共6页Application of Electronic Technique

基　　金：中国科学院知识创新工程领域前沿项目(5408SF032001);新一代宽带无线移动通信网重大专项:面向IMT-Advanced等宽带无线通信系统的数模混合集成电路研发(2009ZX03007-002)

摘　　要：提出了一种依据802.11n规范的单流基带收发器系统算法模型,系统收发模型包括内接收机和外接收机,内接收机基于短训练序列完成帧同步和频率同步的联合估计与频率补偿,基于长训练序列完成符号细同步,采用LS方法实现信道估计,频率/相位联合跟踪和补偿确保内接收机的接收信号质量。外接收机分别采用Viterbi和LDPC完成信道译码设计,选择最小和的置信度传递算法进行LDPC设计,对LPDC和Viterbi的译码性能进行比较,在IEEE WLAN TGN信道条件下,对系统模型的误码率和误帧率进行仿真测试,结果表明,该基带系统算法达到系统设计指标需求。The algorithm model for the 802.11n 1-stream baseband system is presented in this paper, the transceiver model of which is composed of the inner receiver and the outer receiver. In the inner receiver, the jointly estimation ＆ correction for the frame synchronization ＆ frequency synchronization is done according to the short training sequence, the fine synchronization is finished according to the long training sequence, The channel estimation is finished by the LS method, the residual frequency offset ＆ phase tracking ＆ correcting confirm the receiver signal＇s quality. The channel decoder is finished by the Viterbi ＆ LDPC individual, the LDPC decoding is designed by the algorithm of the min-summary belief propagation decoding algorithm,The paper compares the performance between the above decodeing methods, and the BER ＆ PER simulation in the IEEE TGN channel proves that the baseband system＇s performance satisfy the need of the WLAN system.

关 键 词：无线局域网 802.11n 单流模式 内接收机 外接收机 

分 类 号：TN929.5[电子电信—通信与信息系统]