| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit configuration, having a small hardware amount and a simple configuration in a receiver for a multi-carrier CDMA signal. SOLUTION: A multi-carrier signal received by an antenna 1 is converted into a signal at an IF band by an RX 2, and an orthogonal detector 3 converts the signal into I, Q signals. The I, Q signals that are multi-carrier signals are converted as is into digital signals by A/D converters 4-1, 4-2 and given to complex filters 6-1 to 6-k. The complex filters 6-1 to 6-k extract a complex signal of a desired carrier. Then a plurality of multiplier sections 7-1 to 7-k shift a center frequency of the extracted complex signal to 0 Hz. The baseband signal obtained as above is given to fingers 8-1 to 8-k, where the signal is inversely spread and demodulated. A synthesis section 9 applies RAKE synthesis to the inversely spread and demodulated signal, and the result is fed to a signal discrimination section. |
