| 摘要 |
PROBLEM TO BE SOLVED: To simplify constitution which connects a radio process part and baseband process parts as to the CDMA radio base station which receives a radio signal of the CDMA system using carriers of different frequencies and different spread codes, amplifies the receive signal for each carrier at the radio process part, and reversely spreads the signals for each carrier at base band process parts. SOLUTION: In a radio process part, a distributor 7 distributes the receive signal, and frequency filters F1 to Fn extract signals for each carrier from the distributed signal, and amplifiers A1 to An amplify the extracted signals to a specific level and a composition unit 8 put together the signals of each of the carriers outputted from the amplifiers. Extracting means Q1 to Qm extracts the signals of the carriers to be sprayed reversely from the composite signal outputted by the composition unit 8 and reverse spreading means D1 to Dm reversely spread the extracted signals with spread codes. |
