| 摘要 |
PURPOSE:To reduce the mutual interference quantity and thus to increase the intensity of the narrow-band signals by distributing the narrow-band signals at the frequency distant by the integer-fold amount of the clock frequency away from the central frequency of the diffusion signal and then transmitting these signals at one time. CONSTITUTION:The spectrum features curve 31 for the spectrum diffusion signal which received a high-speed PSK via the diffusion code featuring the clock frequency of fC, and the frequency component which is away by the integer-fold amount of clock frequency fC from central frequency fO becomes nearly zero. Accordingly, if the frequency distribution is set as fO+ or -KfC (K: optional integer) for narrow-band signals 32-35, the power density of the spectrum diffusion signal is nearly zero with these frequencies mentioned above. As a result, the interference given to the narrow-band signals can be minimized. |
