US 6,643,339 B1 · Receiver and receiving method

Abstract

K sub-carrier components from an FFT circuit 101 are output to a sub-carrier demodulating circuit 102. The sub-carrier demodulating circuit 102 demodulates the k sub-carrier components and outputs a transmitted information bit to an output terminal 104. Further, the sub-carrier demodulating circuit 102 outputs distortion correction coefficients C(1)-C(k) that are used during demodulation of each sub-carrier, each of sub-carrier components S(1)-S(k) in which distortion is corrected, and determination signal points R(1)-R(k) for each sub-carrier to a phase estimating circuit 103. The phase estimating circuit 103 receives C(1)-C(k), R(1)-R(k) and S(1)-S(k), and outputs a phase error signal to an output terminal 105. The phase error signal output to the output terminal 105 is integrated by a loop filter and so forth, and is fed back to a local oscillator, and thereby, phase tracking is conducted.

Claims17

Dependent claims

A receiver for receiving a modulated wave for carrying data in which N sub-carriers are multiplexed, said receiver comprising:

a sub-carrier demodulating circuit for receiving a plurality of (k, 1≦k≦N) sub-carrier components which are multiplexed and de-multiplexed, and outputting a result of demodulating each of said sub-carrier components as a demodulation result of each of said plurality of sub-carrier components, and for conducting determination based on said demodulation result and outputting a determination result, and outputting a distortion correction coefficient for each of said plurality of sub-carrier components, and a value which is generated by correcting each of said plurality of sub-carrier components based on said distortion correction coefficient;
and
a phase estimating circuit for receiving the determination result of each of said plurality of sub-carrier components, the distortion correction coefficient for each of said plurality of sub-carrier components, and the value which is generated by correcting each of said plurality of sub-carrier components based on said distortion correction coefficient, and for outputting a phase error.

A receiver for receiving a modulated wave for transmitting data in which N sub-carriers are multiplexed, said receiver comprising:

a sub-carrier demodulating circuit for receiving a plurality of (k, 1≦k≦N) sub-carrier components which are multiplexed and de-multiplexed, and outputting a result of demodulating each of said sub-carrier components as a demodulation result of each of said plurality of sub-carrier components, and for conducting determination based on said demodulation result and outputting a determination result, and outputting a value which is obtained by correcting distortion generated in each of said plurality of sub-carrier components;
and
a phase estimating circuit for receiving the demodulation result of each of said plurality of sub-carrier components, the value which is obtained by correcting distortion generated in each of said plurality of sub-carrier components, and said plurality of sub-carrier components which are multiplexed and de-multiplexed, and for outputting a phase error.

A receiving method of receiving a modulated wave for carrying a data in which N sub-carriers are multiplexed, said receiving method comprising:

receiving a plurality of (k, 1≦k≦N) sub-carrier components which are multiplexed and de-multiplexed, and outputting a result of demodulating each of said sub-carrier components as a demodulation result of each of said plurality of sub-carrier components,
conducting determination based on said demodulation result and outputting a determination result, and outputting a distortion correction coefficient for each of said plurality of sub-carrier components, and a value which is generated by correcting each of said plurality of sub-carrier components based on said distortion correction coefficient;
and
estimating a phase error based on said determination result of each of said plurality of sub-carrier components, said distortion correction coefficient for each of said plurality of sub-carrier components and said value which is generated by correcting each of said plurality of sub-carrier components based on said distortion correction coefficient.

1 more element

A receiving method of receiving a modulated wave for transmitting a data in which N sub-carriers are multiplexed, said receiving method comprising:

receiving a plurality of (k, 1≦k≦N) sub-carrier components which are multiplexed and de-multiplexed, and outputting a result of demodulating each of said sub-carrier components as a demodulation result of each of said plurality of sub-carrier components,
conducting determination based on said demodulation result and outputting a determination result, and outputting a value which is obtained by correcting distortion generated in each of said plurality of sub-carrier components;
and
estimating a phase error based on said demodulation result of each of said plurality of sub-carrier components, said value which is obtained by correcting distortion generated in each of said plurality of sub-carrier components and said plurality of sub-carrier components which are multiplexed and de-multiplexed.

1 more element

Dependencies are inferred from the claim text.

Receiver and receiving method

Life of this patent

Receiver and receiving method

Life of this patent

Abstract

Claims17