| 摘要 |
PURPOSE:To enhance the multiplicity without deteriorating occupied band width of a spread spectrum signal and an error rate at the time of end of reverse diffusion. CONSTITUTION:In order to prevent the deterioration of multiplicity caused by an interference of other station, spread required for an error correction encoding and pseudo random signal spread is separated. Since the spread by a pseudo random signal is utilized, randomness in spread spectrum data increases, compared with conventional and information of other station can be eliminated more satisfactorily then conventional, and also, even if the information of other station remains behind, an error can be corrected by an error correction decoder, and as a result, an error rate at the time when reverse spread spectrum is finished becomes smaller than conventional and the multiplicity can be enhanced. |
