5aaed784e6d884ddcce747b63557b1d2

说明：  Low-density parity-check (LDPC) codes combined with cascade combining are able to achieve excellent bit-error rate (BER)performance over multipath fadingchannels. Cascade combining, which involves two stages of diversity combining, is very useful for situations where site diversity exists and it can reduce the complexity of the combiner when the number of diversity branches increases.