Apparatus and method of wideband automatic gain control algorithm supporting multiple carriers with possibly different air interface technologies

摘要

One or more aspects of the disclosure provide an improved receiver automatic gain control (RxAGC) algorithm operable at a wireless receiver that is capable of receiving transmissions at two or more carrier frequencies utilizing a shared radio frequency (RF) front end architecture, whether in the same radio technology or in different radio technologies. The RxAGC algorithm is utilized to control the gain of amplifiers within the receive chain. Other aspects, embodiments, and features are also claimed and described.

主权项

1. A receiver for wireless communication, comprising:
a wideband chain configured to receive a wideband signal and apply an analog gain to the wideband signal; a plurality of narrowband chains, in a multi-carrier single band mode (SB mode), configured to receive a plurality of narrowband signals, respectively, of the wideband signal, wherein each of the narrowband chains is configured to apply a digital gain to a corresponding one of the narrowband signals; and an automatic gain controller (AGC) configured to dynamically adjust the analog gain and the digital gains in accordance with a wideband energy estimate and a plurality of narrowband energy estimates, wherein the wideband energy estimate corresponds to the energy of the received signals, and the plurality of narrowband energy estimates correspond to the energy of the narrowband signals, wherein the AGC is further configured to:
in the SB mode,
determine an in-band difference between the wideband energy estimate and a minimum value of the narrowband energy estimates;if a minimum value of the narrowband energy estimates is less than a floor, increase the analog gain;if any of the narrowband energy estimates is greater than an upper threshold, decrease the analog gain; andif the in-band difference is greater than an in-band jammer threshold, exit the SB mode and utilize the wideband chain and one of the narrowband chains to receive a corresponding one of the narrowband signals.