| 摘要 |
PURPOSE: A continuous orthogonal band diffusion code hopping multiplexing method at a non-interference wireless communication CDMA system is provided to increase dramatically the number of downlink channels of CDMA non-interference wireless mobile communications system based on a continuous orthogonal band diffusion code having a small family size. CONSTITUTION: A transmitter (210) transmits a signal to a receiver (230) through a multipath (220). A free-rake transmitter connected to a ZCD (Zero Correlation Duration) code comprises a spreader (211), a ZCD code generator (212), a code hopping multiplexer (213), and a free-rake coupler (214). A receiver outputs an input signal passing a multipath channel through a matched filter (231) and a decision unit (232) after adding a noise signal to an input signal. [Reference numerals] (210) Transmitter (BS); (211) Spreader; (212) ZCD code generator; (213) Code hopping multiplexer; (214) Free-rake coupler; (220,AA) Multipath channel; (230) Receiver (MS); (231) Matched filter; (232) Decision unit; (BB) Noise n (t); (CC) Single path receiver
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