| Summary: | 碩士 === 大同大學 === 資訊工程學系(所) === 103 === Satellite technology has gradually matured, one of the common use of satellite TV, via satellite to deliver digital television channels, let the more remote areas can enjoy TV entertainment. error correction code can be applied to a wireless communication network, which Low-density parity-check (LDPC) low-density parity check code is quite popular, in 1962, proposed by Rober.G.Gallager, its good quality of service approaches Shannon Limit, at that time, subject to the difficulty of hardware design, so we did not have attention, but with the era of progress, LDPC coding has gradually become one of the people seriously, and LDPC quite applicable in satellite systems, improve interference problems encountered during transmission capable of encoding and decoding of the way, let effectively reduce the bit error rate drop, in order to improve service quality, use hash function (hash function) and Advanced Encryption Standard (AES) to improve satellite common shortcomings.
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