Iterative algorithm on single-channel blind separation and decoding of co-frequency modulated signals
An algorithm was proposed to exploit the codes in iterative single-channel blind separation and decoding of two co-frequency modulated signals with long-constraint channel codes.The output log-likelihood ratio（LLR） values of the decoder were used as a prior LLR fed back to the separator to improve t...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2011-01-01
|
| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74419544/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | An algorithm was proposed to exploit the codes in iterative single-channel blind separation and decoding of two co-frequency modulated signals with long-constraint channel codes.The output log-likelihood ratio（LLR） values of the decoder were used as a prior LLR fed back to the separator to improve the separation performance.Special emphases were laid on soft input soft output blind separation,maximum a posteriori（MAP） decoding and LLR interaction between separator and decoder.Simulation results show that the proposed algorithm can make a significant improvement in per-formance over the algorithms without iterations.For BPSK signals with（2,1,6） convolutional codes and random inter-leaving,a gain of about 2dB in signal-noise ratio can be obtained after two iterations. |
|---|---|
| ISSN: | 1000-436X |