Carrier Frequency Offset and I/Q Imbalance Compensation for MB-OFDM Based UWB System

被引：4
|
作者：
Liu, Liang [1 ]
Ren, Junyan [1 ]
Zhou, Jun [1 ]
Ye, Fan [1 ]
机构：
[1] Micro Nanoelect Innovat Platform Fudan Univ, State Key Lab ASIC & Syst, Shanghai 201203, Peoples R China
来源：
WIRELESS PERSONAL COMMUNICATIONS | 2013年 / 71卷 / 02期
关键词：
MB-OFDM; UWB; CFO; I/Q imbalance; CFO;
D O I：
10.1007/s11277-012-0863-4
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Two types of wireless communication system imperfections, namely carrier frequency offset (CFO) and in-phase/quadrature-phase (I/Q) imbalance, are addressed in this paper. We propose an efficient time domain CFO and I/Q imbalance estimation and compensation scheme for multi-band orthogonal frequency division multiplexing based ultra-wideband system. In this scheme, a data-aided CFO estimation algorithm, which is robust to a large I/Q imbalance, is presented. Also, a time domain I/Q imbalance estimation algorithm based on partially CFO compensated preambles is introduced. Finally a two-step joint CFO and I/Q imbalance compensation scheme is developed. Taking full advantage of the ECMA-368 preamble symbols, the proposed scheme is competent for large I/Q imbalance (2-dB gain error and 20-deg Phase error) and carrier frequency offset (50 ppm), and the results are confirmed by simulations.
引用
收藏
页码：1095 / 1107
页数：13
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