| 摘要 |
PROBLEM TO BE SOLVED: To surely extract a signal for each user in a radio receiving system by a PDMA system. SOLUTION: The system is provided with an interference canceller of plural stages. Reception signals are separated and demodulated for the respective users in adaptive arrays AA, parameter estimation parts PE and detectors DE in the interference cancellers of the respective stages and they are finally outputted from a processing circuit 200. The signals demodulated without demodulation errors are deducted from the reception signals, interference by the user signal is removed and they are sent to the interference canceller of the next stage. The users allocated to the same time slot are allocated so that the reception power differences of the user signals become large. Thus, any signals can be demodulated without errors in the respective stages and they can be removed from the reception signals.
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