| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent deterioration of the quality of a transmission system caused by burst error and caused by the increase of puncturing. SOLUTION: The parallel transmission system in CDMA, where transmission and reception of data are performed by the diffusion and reverse diffusion with diffusion codes, is equipped with transmitter-receiver 20 and 40 which synthesize the same several data obtained by diffusing and transmitting the same data to be distributed into plural pieces with different diffusion codes and reversely diffusing the input signals with diffusion codes, and number-of- diffusion-codes controllers 28 and 50 which close-loop-control the number of diffusion codes for performing the diffusion or reverse diffusion of the same several data distributed into plural pieces, according to the quality of circuits at the time of having received the same several data with a transmitting- receiving section.</p> |
