首页>
外国专利>
Digital broadcasting systems using parallel concatenated coding of bit-complementary bitstreams
Digital broadcasting systems using parallel concatenated coding of bit-complementary bitstreams
展开▼
机译:使用比特互补比特流的并行级联编码的数字广播系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
A digital television (DTV) system uses parallel concatenated coding (PCC), together with QAM constellations for modulating OFDM carriers. A first encoder responds to ONEs' complemented bits of randomized data to generate a first component of PCC. A second encoder responds to delayed bits of the randomized data to generate a second component of PCC. A constellation mapper generates QAM symbols responsive to successive time-slices of the first component of the PCC interleaved with successive time-slices of the second component of the PCC. An OFDM modulator generates a COFDM modulating signal responsive to the QAM symbols. In a receiver for the DTV system, the second component of the PCC and delayed first component of the PCC are iteratively decoded. Soft bits from the second component and delayed first component of the parallel concatenated coding are code-combined to supply soft randomized data used in that iterative decoding.
展开▼