Patent ID: 7349464

Claim:
A receiver which receives a direct-sequence spread spectrum signal, the receiver comprising: channel-matched-filter means, which is provided in the foremost stage and connected to an output of a converter converting the spread spectrum signal into a digital received signal, for performing Rake combining to the received signal to output a Rake combining result, the channel-matched-filter means including a memory having a capacity of a clock tracking amount for symbol synchronization; carrier recovery means which is connected to an output of the channel-matched-filter means and removes an offset of a carrier wave from the Rake combining result; correlation means which is connected to an output of the carrier recovery means and detects correlation of the spread spectrum communication for the Rake combining result from which the offset of carrier wave is removed; symbol detection means for extracting a symbol based on a correlation result detected by the correlation means; symbol determination means for regenerating data from the symbol extracted by the symbol detection means; frame discrimination means for discriminating a frame configuration from the data regenerated by the symbol determination means; and symbol timing recovery means for calculating a timing error amount for each of symbol timings to output a timing phase corresponding to the timing error amount to the channel-matched-filter means; wherein the channel-matched-filter means, in accordance with a first feedback from the symbol detection means, performs multi-phasing compensation for the received signal, and in accordance with the timing phase supplied by a second feedback from the symbol timing recovery means, performs symbol synchronization, code synchronization and clock synchronization to the received signal; and the carrier recovery means, in accordance with a third feedback from the symbol detection means, compensates a frequency offset of the carrier wave from the Rake combining result.