Receiver with automatic frequency control

摘要

In a receiver, a frequency offset estimating circuit inputs a received signal and a decision value from a decision circuit, and estimates a frequency offset. A CIR estimating circuit inputs the estimated frequency offset, the received signal and the decision value, and estimates CIR. A complex conjugate circuit calculates a complex conjugate of the CIR. A multiplication circuit multiplies the complex conjugate and the received signal. Receiving the multiplied value, the decision circuit outputs a decision value.