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| Content Provider | IET Digital Library |
|---|---|
| Author | Wu, Yue Yang, Hongwen |
| Abstract | The energy efficiency of the low-density parity check (LDPC) coded chase combining hybrid automatic repeat request (HARQ) system over the additive white Gaussian noise channel is analysed. The energy efficiency can be improved by increasing the maximum transmission number (K) and reducing the transmit power. The asymptotic energy efficiency corresponding to K = ∞ equals the reciprocal of the threshold signal-to-noise ratio of the forward error correction code, which does not depend on the falling speed of the word error ratio. When the retransmission number is relatively small, optimising equal transmit power and variable transmit power can improve the energy efficiency by up to 10 and 18% respectively, compared with minimum equal power transmission. |
| Starting Page | 490 |
| Ending Page | 492 |
| Page Count | 3 |
| ISSN | 00135194 |
| Volume Number | 51 |
| e-ISSN | 1350911X |
| Issue Number | Issue 6, Mar (2015) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/el/51/6 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/el.2014.4462 |
| Journal | Electronics Letters |
| Publisher Date | 2015-03-04 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Additive White Gaussian Noise Channel Automatic Repeat Request AWGN Channel Code Energy Efficiency Optimization Equal Transmit Power Optimisation FEC Forward Error Correction Forward Error Correction Code LDPC Coded Chase Combining HARQ System LDPC Coded Chase Combining Hybrid Automatic Repeat Request System Maximum Transmission Number Optimisation Optimisation Technique Parity Check Code Protocol Retransmission Number SNR Threshold Signal-to-noise Ratio Transmit Power Reduction Variable Transmit Power Optimisation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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