| 摘要 |
PROBLEM TO BE SOLVED: To constitute the reception circuit of a multiplex signal when plural diffusion codes are allocated to one user without increasing a circuit scale. SOLUTION: A first circuit 1 receives a CDMA(code division multiple access) multiplex signal which is directly diffused by the plural diffusion codes allocated to one user and executes a correlation detection processing. The correlation detection signals of corresponding inverse diffusion codes are processed so that they are weighted. Thus, the first circuit 1 outputs the correlation detection signals of the respective inverse diffusion codes in series and therefore only one second circuit 2 demodulating data from the correlation detection signal is required. The second circuit 2 executes a data demodulation processing on the respective correlation detection signals inputted from the first circuit 1 in series and outputs demodulation data with bit series to a third circuit 3. The third circuit 3 compares the respective values of the multiplex number of data bits on demodulation data inputted from the second circuit with bit series with a prescribed threshold so as to judge sizes. Then, data signals on the plural diffusion codes are separated/outputted. |
