Fast predictive automatic gain control for dynamic range reduction in wireless communication receiver

A channel estimation and gain prediction system for a receiver for fast predictive automatic gain control, comprising:

• a channel gain estimator which estimates channel gain applied to a received signal and which determines an estimated channel gain;
• a channel gain predictor which predicts channel gain at a subsequent time by applying temporal autocorrelation statistics to said estimated channel gain to provide a predicted channel gain, and wherein said channel gain predictor determines a predicted error variance;
• a predictive gain controller which uses said predicted channel gain and said predicted error variance to determine a predicted receiver gain to reduce variance between said predicted channel gain and a target power level;
• and
• a gain circuit which applies said predicted receiver gain to said received signal.

A channel estimation and gain prediction system for a receiver for fast predictive automatic gain control, comprising:

• a channel gain estimator which estimates channel gain applied to a received signal and which determines an estimated channel gain;
• a channel gain predictor which predicts channel gain at a subsequent time by applying temporal autocorrelation statistics to said estimated channel gain to provide a predicted channel gain;
• a predictive gain controller which uses said predicted channel gain to determine a predicted receiver gain to reduce variance between said predicted channel gain and a target power level;
• a gain circuit which applies said predicted receiver gain to said received signal;
• a channel statistics estimator having an input receiving said estimated channel gain and an output providing temporal correlation values;
• and
• wherein said channel gain predictor has a first input receiving said estimated channel gain, a second input receiving said temporal correlation values, and a first output providing predicted channel gain values based on said estimated channel gain and said temporal correlation values.

A receiver, comprising:

• a radio which receives and converts a transmitted signal into a received signal and which amplifies said received signal by a predictive gain signal to provide a gain-controlled received signal;
• an analog to digital converter (ADC) having an input receiving said gain-controlled received signal and an output providing received signal samples;
• a channel estimation and gain prediction circuit, comprising:
• a channel predictor having a first input receiving said received signal samples, a second input receiving current gain values, a first output providing predictive channel gain values and a second output providing predictive error variance values, wherein said predictive channel gain values and said predictive error variance values are determined using a temporal correlation function;
• a predictive gain controller having a first input receiving said predictive channel gain values, a second input receiving said predictive error variance values, and an output providing predictive gain values;
• and
• a memory device having an input receiving said predictive gain values and an output providing said current gain values;
• and
• a digital to analog converter (DAC) having an input receiving said current gain values and an output providing said predictive gain signal.