Combined discrete automatic gain control (agc) and dc...

Details Combined discrete automatic gain control (agc) and dc... Combined discrete automatic gain control (agc) and dc...

H - Electricity

03

G

H03G 3/20 (2006.01) H03G 3/00 (2006.01) H04B 1/30 (2006.01) H04B 7/005 (2006.01) H04L 25/06 (2006.01) H04L 27/38 (2006.01)

Patent

CA 2360266

An automatic gain control (AGC) and DC estimation and correction technique for wireless communication devices is disclosed. An AGC signal, which controls a gain applied to a received signal by a gain stage to generate a scaled signal, is assigned one of a relatively small number of values in accordance with the amplitude of the scaled signal. An estimate of a DC offset in the scaled signal corresponding to each value of the AGC signal is stored in a memory. A DC estimation arrangement then reads the stored estimate associated with the particular value of the AGC signal from the memory and generates a current DC estimate based thereon. The current estimate is then used to correct the scaled signal for DC offset and to update the stored estimate.

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