US 2010/0136900 A1Published application

Radio Relay Device and Method

AssigneeFujitsu Limited

InventorHiroyuki SEKI

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Abstract

A radio relay method for relaying and transmitting a received radio signal, including receiving the radio signal as a first received signal through a first antenna, outputting a first gain controlled signal which controls gain of the first received signal, transmitting a first relay signal which amplifies the first gain controlled signal, receiving the radio signal as a second received signal through a second antenna, outputting a second gain controlled signal which controls gain of the second received signal, transmitting a second relay signal which amplifies the second gain controlled signal. Father including generating a first wait which is used to remove self interference from the first received signal, based on the first and second gain controlled signals and the first input signal used to control the gain, and removing the self interference from the first received signal based on the first wait.

Claims12

Dependent claims

A radio relay device which relays and transmits a received radio signal, comprising:

a first receiving part which receives the radio signal through a first antenna;
a first gain control part which controls gain of a first received signal which is received by the first receiving part;
a first transmitting part which transmits a first relay signal which is obtained by amplifying an output signal of the first gain control part;
a second receiving part which receives the radio signal through a second antenna;
a second gain control part which controls gain of a second received signal which is received by the second receiving part,
a second transmitting part which transmits a second relay signal which is obtained by amplifying an output signal of the second gain control part;
a first generating part which generates, based on the output signals of the first and second gain control parts and on the signal which is input to the first gain control part;
a first wait which is used to remove a self interference from the first received signal;
a first self interference removing part which removes the self interference from the first received signal based on the first wait;
a second generating part which generates, based on the output signals of the first and second gain control parts and on the signal which is input to the second gain control part;
a second wait which is used to remove the self interference from the second received signal;
and
a second self interference removing part which removes the self interference from the second received signal based on the second wait.

10 more elements

A radio relay device which relays and transmits a received radio signal, comprising:

a first receiving part which receives the radio signal through a first antenna;
a first band selection part which selects both a band of a first communication method and the band of a second communication method as a band of a first received signal received by the first receiving part;
a first transmitting part which transmits a first relay signal which is obtained by amplifying an output signal of the band selected by the first band selection part;
a second receiving part which receives the radio signal through a second antenna;
a second band selection part which selects the band of the first communication method as a band of a second received signal received by the second receiving part;
a second transmitting part which transmits an output signal of the band of the second communication method among the bands selected by the first band selection part and a second relay signal obtained by amplifying the output signal;
a first generating part which generates a first wait used to remove a self interference from the first received signal which includes the first relay signal and the second relay signal as a sneak wave based on the output signal of the first band selection part and the second band selection part and a signal to be input to the first band selection part;
a first self interference removing part which removes the self interference from the first received signal based on the first wait;
a second generating part which generates a second wait used to subtract the sneak wave from the second received signal which includes the sneak wave based on the output signal of the first band selection part and the second band selection part and a signal to be input to the second band selection part;
and
a second self interference removing part which removes the self interference removing from the second received signal based on the second wait.

8 more elements

A radio relay method for relaying and transmitting a received radio signal, comprising:

receiving the radio signal as a first received signal through a first antenna;
outputting a first gain controlled signal which controls gain of the first received signal;
transmitting a first relay signal which is obtained by amplifying the first gain controlled signal;
receiving the radio signal as a second received signal through a second antenna;
outputting a second gain controlled signal which controls gain of the second received signal;
transmitting a second relay signal which is obtained by amplifying the second gain controlled signal;
generating a first wait which is used to remove the self interference from the first received signal based on the first and second gain controlled signals and the first input signal used to control the gain;
removing the self interference from the first received signal based on the first wait;
generating a second wait which is used to remove the self interference from the second received signal based on the first and second gain controlled signals and the second input signal used to control the gain;
and
removing the self interference from the second received signal based on the second wait.

8 more elements

Dependencies are inferred from the claim text.