Patent ID: 10110253

Abstract:
Provided is a BICM-ID technique which suppresses deterioration of decoding characteristics and reduces a calculation amount. A receiver includes a demodulator, deinterleaver, decoder, and interleaver. The demodulator outputs first extrinsic information by using a received signal encoded and interleaved and a priori information. The deinterleaver processes the first extrinsic information and outputs second extrinsic information. The decoder outputs third extrinsic information by using the second extrinsic information. The interleaver processes the third extrinsic information and outputs fourth extrinsic information. In the receiver that performs iterative decoding processing using the fourth extrinsic information as the a priori information, the demodulator includes a generator, a received signal point candidate narrowing-down unit, and a likelihood calculation unit. The generator generates a plurality of received signal point candidates. The likelihood calculation unit creates the first extrinsic information based on the narrowed-down received signal point candidates, the a priori information, and the received signal.