| Summary: | 碩士 === 國立交通大學 === 電信工程系所 === 93 === This thesis proposes a new encoding and decoding method which can be applied to Digital Video Broadcasting (DVB) Systems. There are many kinds of error correction codes. Low Density Parity Check (LDPC) Code gets a lot of attention recently because its coding gain is near the Shannon limit. Moreover, the decoder is easy to implement and the hardware cost is low. Conventional Digital Video Broadcasting System uses two concatenated codes, an outer code (Reed-Solomon code) and an inner code (Convolutional code), respectively. These two codes have different interleavers. In order to simplify the coding scheme of Digital Video Broadcasting Systems, here we use a single Low Density Parity Check code to substitute for the original Reed-Solomon code and the Convolutional code, together with their interleavers. We use computer simulation to compare the bit error rate performance of the Low Density Parity Check Code and the original concatenated codes in Digital Video Broadcasting Systems.
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