Hamilton, DeSanctis & Cha (LSI)
AGC loop with weighted zero forcing and LMS error sources and methods for using such
Various embodiments of the present invention provide systems and methods for gain control. For example, some embodiments of the present invention provide variable gain control circuits. Such circuits include a zero forcing loop generating a zero forcing feedback and a least mean square loop generating a least mean square feedback. An error quantization circuit generates a hybrid feedback based upon a threshold condition using the zero forcing feedback and the least mean square feedback. A variable gain amplifier is at least in part controlled by a derivative of the hybrid feedback.
LSI Corporation
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George Jingfeng Hongwei Yuan Xing Jongseung
Mathew Liu Song Lee Park