Attenuation and frequency offset estimation

摘要

The transmission system has a transmitter and a receiver, and is susceptible to the introduction of frequency shift and attenuation. The transmitter includes a mechanism for emitting a sinusoidal signal for known frequency. The receiver has a reception mechanism for the sinusoidal signal and a unit for estimating the frequency shift of the sinusoid. The frequency offset estimator measures the frequency shift between the transmission and reception of a sinusoidal frequency. A phase shifter (30) shifts the incoming signal in 90 degree steps and the remaining frequency separation between the two sample frequencies is compared in a processor (32-38). Independent claim are included for a receiver and a method of estimating the frequency shift.