DC offsets in direct conversion multistandard wireless receivers: Modeling and cancellation

被引：8
|
作者：
Park, Seok-Bae [2 ]
Ismail, Mohammed
机构：
[1] Firstpass Technol, Dublin, OH 43017 USA
[2] Ohio State Univ, Dept Elect & Comp Engn, Analog VLSI Lab, Columbus, OH 43210 USA
来源：
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING | 2006年 / 49卷 / 02期
关键词：
direct conversion receivers; DC offset modeling; DC offset cancellation; adaptive filtering;
D O I：
10.1007/s10470-006-9642-z
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
To realize a high performance direct conversion receiver for multistandard wireless communications, the limiting factors in the direct conversion receiver should be identified and removed. In this paper, among many problems in direct conversion receivers, the DC offset problem is studied. The origins of the DC offset are summarized, and three self-mixing mechanisms generating the DC offset are modeled to better understand how the static (or time-invariant) and dynamic (or time-varying) DC offsets are produced from the mechanisms. A DC offset cancellation scheme consisting of a static DC offset canceller and a dynamic DC offset canceller is proposed and verified through simulations.
引用
收藏
页码：123 / 130
页数：8
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