发明名称 |
METHOD AND APPARATUS FOR REMOVING DC OFFSET ERROR IN A DIRECT CONVERSION RECEIVER |
摘要 |
<p>A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.</p> |
申请公布号 |
EP2374213(A2) |
申请公布日期 |
2011.10.12 |
申请号 |
EP20090830838 |
申请日期 |
2009.11.17 |
申请人 |
MOTOROLA SOLUTIONS, INC. |
发明人 |
STOGNER, DARRELL, J.;RAO, YADUNANDANA, N.;RUELKE, CHARLES, R.;LAMPERT, CHET, A. |
分类号 |
H04B17/40;H04L25/06;H04B1/30 |
主分类号 |
H04B17/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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