Direct-sequence-code division multiple access-ultra wideband (CDMA-UWB)-based cognitive radio system receiver

The invention discloses a direct-sequence-code division multiple access-ultra wideband (CDMA-UWB)-based cognitive radio system receiver, which consists of a Rake receiver module and an equalizer and judger module. Relationships between the Rake receiver module and the equalizer and judger module are that: the Rake receiver module receives signals from a plurality of paths; selection and weight summation processing are performed on the signals in the Rake receiver module, and the obtained signals enter the equalizer and judger module; the signals processed by the Rake receiver module are further processed by combining feedback judgment and equalization processing in the equalizer and judger module to more approach to actual signals; and the signals output by the equalizer and judger module are signals actually obtained by the receiver. The receiver receives the signals by adopting the Rake receiver module in an implicit diversity technology, equalizes the signals subjected to the diversity combination of the Rake receiver module by adopting a feedback judgment and equalization technology, and has vast application prospect in the technical field of cognitive radio.