| 摘要 |
A spread spectrum communication receiver includes a spread code generating section, a receiver, a searcher, a tracking section, a path capturing/holding section, a correlation demodulation path selection section, a rake section, and a decoder section. The searcher obtains search paths separated by one chip or more. The tracking section tracks tracking paths separated by one or more chip on the basis of the demodulated signal and the spread code, and obtains the correlation levels of the paths. The path capturing/holding section compares the search paths with the tracking paths to capture/hold paths, provides backward protection in detecting the coincidence between paths and forward protection in detecting the loss of a path, and classifies path captured/held states of tracking paths into a complete incoincident state, a forward protection state, a complete protection state, and a forward protection state, thereby obtaining a path state. The correlation demodulation path selection section selects paths to be subjected to correlation demodulation on the basis of the path state and the correlation levels. The rake section detects demodulated paths, and performs rake synthesis of the demodulated paths. The decoder section decodes the demodulated data and outputs the decoded data. <IMAGE> |
