Patent ID: 9673917
Date: 2017-06-06
CPC Classifications: H04B

Claim:
1. A method for calibrating a receiver, the method comprising: receiving, at the receiver, an input signal comprising an input noise and a received signal, the input signal being received wirelessly via a radio frequency (RF) antenna configured for use in radio frequency communications; generating, at the receiver, an output signal from the input signal; estimating an input noise power to the receiver across a range of frequencies, the input noise power comprising a power of the input noise in the input signal; measuring an output noise power across the range of frequencies based on the output signal generated at the receiver from the input signal received via the RF antenna, the output noise power comprising a power of an output noise in the output signal; determining a gain in a specified frequency band based on the estimated input noise power and the measured output noise power, the specified frequency band being less than an operating receive frequency band of the receiver; and calibrating a relative gain of the receiver based upon the determined gain in the specified frequency band, wherein the input noise is not internally generated in the receiver, and wherein the received signal is a signal whose strength is below a noise floor.