| 摘要 |
A CDMA receiving apparatus which can perform coherent detection in multi-code transmission with high accuracy by using a pilot signal, and can be easily produced. The apparatus demodulates data multi-code-transmitted through a plurality of channels, wherein in each of the systems for demodulating reception signals of the respective channels, there are provided spread code generating units for generating spread codes allocated to the channels, spread code generating units for generating spread codes in which a pilot signal is spread, and despreading units for despreading the reception signal on the basis of the spread codes generated by those spread code generating means, so that the transmission condition of the line is estimated on the basis of the pilot signal extracted by despreading and coherent detection of the reception signals of the respective channels is corrected on the basis of the result of the estimation. Because the transmission condition of the line can be estimated by the respective systems, information of the transmission condition need not be distributed to the respective systems.
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