| 摘要 |
PURPOSE:To reduce the noise emphasis effect accompanied by the increase of the number of communicator in an inverse correlation filter processing by performing an inverse spread for the reception signal from a communicator, decoding an error code, detecting the presence or absence of an error and subtracting the identification result of the communicator where the error is not detected by performing a correlation filter processing. CONSTITUTION:On the side of a transmission, an error detection encoding is performed for information data from an input terminal 11 in an encoder 12, a spread spectrum is performed for the encoding output in a diffuser 13 and the output is transmitted from an output terminal 14. In a receiver, an inverse spread is performed for each reception signal from N communicators inputted from the input terminal in a signal processing part 16. The inverse vector is decided and identified for each communicator in an identification circuit 21 via a storage device 17 and an inverse correlation filter 19. The identification result is outputted from an output terminal 22, the result is inputted into a decoder 23 and the presence or absence of an error is investigated for each communicator. For the communicator for which the error is not detected, a decision identification result is generated, and for the communicator for which the error is detected, a vector b'N where zeros are arranged is generated, they are inputted in a subtracter via a correlation filter 25. When the error of the communicator is not detected or the number of error detection becomes constant, the processing is disconnected. |
