计算机工程 ›› 2010, Vol. 36 ›› Issue (9): 97-99,1.doi: 10.3969/j.issn.1000-3428.2010.09.033

• 网络与通信 • 上一篇    下一篇

超宽带系统非理想因素的联合估计算法

周 军,刘 亮,叶 凡,李 巍,李 宁,任俊彦   

  1. (复旦大学专用集成电路与系统国家重点实验室/微纳创新平台,上海 201203)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-05-05 发布日期:2010-05-05

Joint Estimation Algorithm of Non-ideal Effects in Ultra-wide Band System

ZHOU Jun, LIU Liang, YE Fan, LI Wei, LI Ning, REN Jun-yan   

  1. (State Key Lab of ASIC & Systems, Micro-/Nano-Electronics Innovation Platform, Fudan University, Shanghai 201203)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-05-05 Published:2010-05-05

摘要: 分析基于正交频分复用调制技术的超宽带无线通信系统中物理层受到的模拟前端非理想因素,提出一种联合估计算法。该联合估计算法能在存在频率相关性I/Q失配的情形下准确获得载波频率偏差和采样频率偏差的估计,并获得频率相关性I/Q失配和信道冲击响应的联合估计信息。系统仿真证明,该计算法能较好地适用于多载波正交频分复用超宽带系统。

关键词: 正交频分复用, 超宽带, 载波频率偏差, 采样频率偏差, I/Q失配

Abstract: This paper investigates the non-ideal analog front-end effects in Orthogonal Frequency Division Multiplexing(OFDM) based Ultra-wide Band(UWB) system and proposes a joint estimation algorithm for Multi-Band OFDM(MB-OFDM) based UWB system. The proposed algorithm can deal with Carrier Frequency Offset(CFO) and Sampling Frequency Offset(SFO) estimation with the presence of frequency dependent In-phase and Quadrature-phased(I/Q) imbalance. Then frequency dependent I/Q imbalance and channel response are jointly estimated. Simulation results show that the proposed joint estimation and compensation algorithm is competent in practical MB-OFDM based UWB system.

Key words: Orthogonal Frequency Division Multiplexing(OFDM), Ultra-wide Band(UWB), Carrier Frequency Offset(CFO), Sampling Frequency Offset(SFO), In-phase and Quadrature-phased(I/Q) imbalance

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