Patent ID: 6347126
Filing Date: 2002-02-12
Classification: H03J,H04B,H04L

Abstract:
A receiver with a frequency offset correcting function comprising:a frequency offset correcting means for receiving a received signal as well as a frequency-offset estimated value, and correcting phase rotation due to frequency offset of said received signal according to said frequency-offset estimated value; a first channel impulse response estimating means for estimating channel impulse response value at a first position of said corrected received signal according to a known training sequence included in the received signal corrected by said frequency offset correcting means; a determining means for determining said received signal corrected by said frequency offset correcting means according to said channel impulse response estimated value at the first position thereof estimated by said first channel impulse response estimating means; a second channel impulse response estimating means for estimating channel impulse response value at a second position different from said first position of said corrected received signal according to said received signal corrected by said frequency offset correcting means, said channel impulse response estimated value at the first position thereof estimated by said first channel impulse response estimating means, and to the value determined by said determining means; and a frequency-offset estimated value computing means for computing a frequency-offset estimated value of said received signal according to said channel impulse response estimated value at the first position thereof estimated by said first channel impulse response estimating means as well as to said channel impulse response estimated value at the second position thereof estimated by said second channel impulse response estimating means, and outputting the computed value to said frequency offset correcting circuit.