JP2011091581A5

JP2011091581A5 - Communication apparatus, relay method and program thereof

Info

Publication number: JP2011091581A5
Application number: JP2009242785A
Authority: JP
Filing date: 2009-10-21
Publication date: 2012-12-06
Anticipated expiration: 2029-10-21

Description

本発明は、通信装置、その中継方法及びプログラムに関する。
The present invention relates to a communication device , a relay method thereof, and a program.

上記課題を解決するため、本発明の一態様による通信装置は、受信信号の波形を記憶する波形記憶手段と、前記受信信号を復調する復調手段と、前記復調された信号を復号する復号手段と、前記復号された信号を符号化する符号化手段と、前記符号化手段により符号化された信号と前記復調手段により復調された信号との少なくともいずれかを変調する変調手段と、前記受信信号の受信状態に応じて、前記符号化手段により符号化された信号を変調した変調信号と前記復調手段により復調された信号を変調した変調信号とのいずれかを送信する送信手段とを有することを特徴とする。
In order to solve the above problems, a communication apparatus according to an aspect of the present invention includes a waveform storage unit that stores a waveform of a reception signal, a demodulation unit that demodulates the reception signal, and a decoding unit that decodes the demodulated signal. Encoding means for encoding the decoded signal; modulation means for modulating at least one of the signal encoded by the encoding means and the signal demodulated by the demodulation means; and the received signal depending on reception conditions, characterized in that a transmission means for transmitting one of the modulated signal obtained by modulating the signal demodulated by the modulation signal and said demodulation means modulates the encoded signal by the encoding means And

Claims

Waveform storage means for storing the waveform of the received signal;
Demodulation means for demodulating the received signal;
Decoding means for decoding the demodulated signal ;
Encoding means for encoding the decoded signal ;
Modulation means for modulating at least one of the signal encoded by the encoding means and the signal demodulated by the demodulation means;
Transmitting means for transmitting either a modulated signal obtained by modulating the signal encoded by the encoding means or a modulated signal obtained by modulating the signal demodulated by the demodulator according to the reception state of the received signal; A communication device comprising:

When the modulation means modulates the encoded signal, a communication control signal is newly added to the modulated signal, and when the modulation means modulates the demodulated signal, the demodulated signal Correct the included communication control signal,
The communication apparatus according to claim 1.

Error determination means for detecting an error in the decoded signal;
The modulation means modulates the signal demodulated by the demodulation means when the amount of error detected from the decoded signal exceeds a predetermined error threshold;
The communication apparatus according to claim 1 or 2 , characterized in that

Error determination means for detecting an error in the decoded signal;
The modulating means modulates the signal encoded by the encoding means if the amount of error detected from the decoded signal does not exceed a predetermined error threshold;
The communication apparatus according to claim 1 or 2 , wherein

  The decoding means decodes the demodulated signal using an error correction code,
  The modulation means modulates the demodulated signal when an error exceeding the correction capability of the error correction code is included in the reception signal, and an error exceeding the correction capability of the error correction code is included in the reception signal. If not, modulate the encoded signal;
  The communication apparatus according to claim 1 or 2, wherein

  A detector for detecting an error included in the decoded signal by verifying a checksum added to the decoded signal;
  The modulating means modulates the demodulated signal when the detecting means detects the error, and modulates the encoded signal when the detecting means does not detect the error;
  The communication apparatus according to claim 1 or 2, wherein

  Measuring means for measuring a noise ratio with respect to the received signal;
  The modulating means modulates the signal demodulated by the demodulating means when the noise ratio measured by the measuring means exceeds a predetermined threshold;
  The communication apparatus according to claim 1 or 2, wherein

The modulation means modulates the signal encoded by the encoding means when the noise ratio detected from the received signal is less than or equal to a predetermined threshold;
The communication device according to claim 7.

  A threshold used as a criterion for determining whether or not an error exceeding the correction capability of the error correction code is included in the received signal is compared with a result of estimating the signal-to-noise ratio of the received signal. And further has an estimation means for
  The modulating means modulates the demodulated signal when the estimated noise ratio exceeds the threshold, and modulates the encoded signal when the estimated noise ratio is less than or equal to the threshold. To
  The communication apparatus according to claim 1 or 2, wherein

A relay method in a communication device,
Storing the waveform of the received signal;
Demodulating the received signal;
Decoding the demodulated signal ;
A step of encoding the decoded signal,
Modulating at least one of the encoded signal and the demodulated signal ;
Transmitting either a modulated signal obtained by modulating the encoded signal or a modulated signal obtained by modulating the demodulated signal according to a reception state of the received signal ;
A relay method for a communication apparatus, comprising:

Computer
Waveform storage means for storing the waveform of the received signal;
Demodulating means for demodulating the received signal,
Decoding means for decoding the demodulated signal,
Encoding means for encoding said decoded signal,
Modulating means for modulating at least one of the signal demodulated by the encoded signal and said demodulation means by the encoding means,
A transmission means for transmitting either a modulation signal obtained by modulating the signal encoded by the encoding means and a modulation signal obtained by modulating the signal demodulated by the demodulation means according to the reception state of the reception signal ;
Program to function as.