| 摘要 |
PROBLEM TO BE SOLVED: To provide a rake receiver in which the size is decreased and power consumption is decreased by improving multipath-fading-resistant characteristics. SOLUTION: A rake receiver based on a logarithmic likelihood ratio is provided with a plurality of rake finger circuits 20I for receiving a multi path receiving signal to conduct estimation of channel and fading distortion compensation, a plurality of circulating LLR calculator 251 to which a received signal is inputted immediately after a compensated receiving signal outputted from each circuit 20I to calculate an LLR being a logarithmic likelihood radio, a path selection section 30 to which an LLR from each calculator 251 is inputted to compare a threshold for each path to the LLR to select a path, an LLR synthesizing section 31 for synthesizing the value of each LLR selected by the section 30, and a data judging section 32 for judging the data based on the synthetic output from the section 31 and outputting it as information. Each calculator 251 inputs the LLR output from a former circulating LLR calculator into a latter one as an external LLR. |
