US 9,813,038 B2
Method and apparatus for automatic gain control
Jichang Liao, Beijing (CN); and Ning Sun, Beijing (CN)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 15/29,977
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 17, 2013, PCT No. PCT/CN2013/085372
§ 371(c)(1), (2) Date Apr. 15, 2016,
PCT Pub. No. WO2015/054860, PCT Pub. Date Apr. 23, 2015.
Prior Publication US 2016/0301374 A1, Oct. 13, 2016
Int. Cl. H04B 7/00 (2006.01); H03G 3/30 (2006.01); H04W 24/04 (2009.01); H04W 24/06 (2009.01); H04W 28/02 (2009.01); H04W 56/00 (2009.01); H04W 88/08 (2009.01)
CPC H03G 3/3052 (2013.01) [H03G 3/3036 (2013.01); H04W 24/04 (2013.01); H04W 24/06 (2013.01); H04W 28/0236 (2013.01); H04W 56/005 (2013.01); H04W 88/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An automatic gain control apparatus comprising:
a first gain controlled element and a second gain controlled element, each of which has a signal input, a gain control input and a signal output, wherein the first gain controlled element and the second gain controlled element are coupled in series, with one or more power elements coupled therebetween, and wherein the signal input of the first gain controlled element constitutes an input of the automatic gain control apparatus;
a first gain control device, having a pre-detection input which is coupled to the signal input of the first gain controlled element and an output which drives the gain control input of the first gain controlled element;
a second gain control device, having a pre-detection input and having an output which drives the gain control input of the second gain controlled element; and
a first simulator, coupled between the signal input of the first gain controlled element and the pre-detection input of the second gain control device, the first simulator being configured to make a signal received by the pre-detection input of the second gain control device be matched with a signal received by the signal input of the second gain controlled element.