US 2019/0097862 A1 · BLIND CFO ESTIMATION METHOD IN WIRELESS COMMUNICATION SYSTEM USING QPSK METHOD

Abstract

Disclosed is a CFO estimation method, which generates a first function defined by a received signal of two sequential OFDM symbols for a specific subcarrier, generates a second function defined on the basis of signs and magnitudes of a real number part and an imaginary number part of the first function, repeats the steps of generating the first function and the second function for all of a subcarrier set, and determines, as a residual CFO, a phase of a third function obtained by adding up the results of the repetition.

Claims16

Dependent claims

A method for estimating a carrier frequency offset (CFO) by a reception module in a wireless communication system using a quadrature phase shift keying (QPSK), the method comprising:

generating a first function defined by a received signal in two consecutive orthogonal frequency division multiplexing (OFDM) symbols for a specific subcarrier;
generating a second function defined based on signs and magnitudes of real and imaginary parts of the first function;
repeatedly performing a process for generating the first and second functions for an entire set of subcarriers;
and
determining a phase of a third function generated by adding results of the repetition as a residual CFO.

2 more elements

A reception module for estimating a carrier frequency offset (CFO) in a wireless communication system using a quadrature phase shift keying (QPSK), the reception module comprising:

a transmitter;
a receiver;
and
a processor connected to the transmitter and the receiver and configured to perform operations,
wherein the processor is configured to:
generate a first function defined by a received signal in two consecutive orthogonal frequency division multiplexing (OFDM) symbols for a specific subcarrier;
generate a second function defined based on signs and magnitudes of real and imaginary parts of the first function;
repeatedly perform a process for generating the first and second functions for an entire set of subcarriers;
and
determine a phase of a third function generated by adding results of the repetition as a residual CFO.

7 more elements

Dependencies are inferred from the claim text.

Blind cfo estimation method in wireless communication system using qpsk method

Life of this patent

Blind cfo estimation method in wireless communication system using qpsk method

Life of this patent

Abstract

Claims16