发明名称 |
AUTOMATIC GAIN CONTROL CIRCUIT FOR MIMO OFDM RECEIVER |
摘要 |
An automatic gain control (AGC) circuit and method for performing AGC for an orthogonal frequency-division multiplexing (OFDM) receiver measures signal power of input digital signals that are derived from incoming data frames with preambles to produce gain change signals when the signal power differs from a reference target power level. The gain of an amplifier of the OFDM receiver is changed in response to the gain change signals until a preamble of the data frames is detected for the first time. The gain of the amplifier of the OFDM receiver is further changed in response to the gain change signals, after the preamble is detected, only during periods when the preambles of the data frames are being processed by the OFDM receiver such that the gain of the amplifier is not changed during periods when other portions of the data frames are being processed by the OFDM receiver.
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申请公布号 |
US2008273636(A1) |
申请公布日期 |
2008.11.06 |
申请号 |
US20080114929 |
申请日期 |
2008.05.05 |
申请人 |
ZHU MINGRUI;GHO GWANG-HYUN;CHOI WON-JOON |
发明人 |
ZHU MINGRUI;GHO GWANG-HYUN;CHOI WON-JOON |
分类号 |
H04L27/08 |
主分类号 |
H04L27/08 |
代理机构 |
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