| A New Arithmetic Coding System Combining Source Channel Coding and MAP Decoding |
| |
| 作者姓名： | 逄玉叶 孙军 王嘉 |
| |
| 作者单位： | Dept.of Electronic Eng. Shanghai Jiaotong Univ.，Dept.of Electronic Eng.，Shanghai Jiaotong Univ.，Dept.of Electronic Eng.，Shanghai Jiaotong Univ.，Shanghai 200240 China，Shanghai 200240 China，Shanghai 200240 China |
| |
| 摘 要： | A new arithmetic coding system combining source channel coding and maximum a posteriori decoding were proposed. It combines source coding and error correction tasks into one unified process by introducing an adaptive forbidden symbol. The proposed system achieves fixed length code words by adaptively adjusting the probability of the forbidden symbol and adding tail digits of variable length. The corresponding improved MAP decoding metric was derived. The proposed system can improve the performance. Simulations were performed on AWGN channels with various noise levels by using both hard and soft decision with BPSK modulation.The results show its performance is slightly better than that of our adaptive arithmetic error correcting coding system using a forbidden symbol.
|
A New Arithmetic Coding System Combining Source Channel Coding and MAP Decoding |
| |
| PANG Yu-ye,SUN Jun,WANG Jia.A New Arithmetic Coding System Combining Source Channel Coding and MAP Decoding[J].Journal of Shanghai Jiaotong university,2007,12(4):442-447. |
| |
| Authors: | PANG Yu-ye SUN Jun WANG Jia |
| |
| Abstract: | A new arithmetic coding system combining source channel coding and maximum a posteriori decoding were proposed. It combines source coding and error correction tasks into one unified process by introducing an adaptive forbidden symbol. The proposed system achieves fixed length code words by adaptively adjusting the probability of the forbidden symbol and adding tail digits of variable length. The corresponding improved MAP decoding metric was derived. The proposed system can improve the performance. Simulations were performed on AWGN channels with various noise levels by using both hard and soft decision with BPSK modulation.The results show its performance is slightly better than that of our adaptive arithmetic error correcting coding system using a forbidden symbol. |
| |
| Keywords: | arithmetic code (AC) forbidden symbol joint source channel coding (JSCC) maximum a posteriori (MAP) decoding |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
