Carrier frequency offset estimation for OFDM systems with time-varying DC Offset

被引：1
|
作者：
Liu, Tao [1 ]
Li, Hanzhang [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Beijing 100083, Peoples R China
[2] China Mobile Grp Shandong Co Ltd, Jinan 250100, Peoples R China
来源：
EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING | 2012年
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
ESTIMATION SCHEME; FRONT-END; IMBALANCE; TECHNOLOGY;
D O I：
10.1186/1687-6180-2012-156
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Orthogonal frequency division multiplexing (OFDM) systems with direct-conversion architecture suffer from both carrier frequency offset (CFO) and dc offset (DCO). In this paper, we study CFO estimation problem for OFDM systems with time-varying DCO (TV-DCO) caused by gain mode switch of low noise amplifier (LNA). Based on linear approximation of TV-DCO, a blind algorithm is proposed for CFO estimation by means of DCO compensation and power leakage minimization. Performance of the proposed algorithm is demonstrated by simulations.
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收藏
页数：6
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