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| Content Provider | IET Digital Library |
|---|---|
| Author | Zhang, Lei Su, Li |
| Abstract | Goal-oriented Luby transform (LT) codes are required in different scenarios. Based on the random walk model, analysis of ripple size evolution provides an effective method to design LT codes. However, the ripple addition in each step depends on both the number of symbols released in the current step and the ripple size in the last step, leading to distortion. Therefore, the authors propose a random walk algorithm with barrier (RWA-B) to model the ripple addition directly. To evaluate the performance of ripple size evolution, they utilise generalised degree distribution algorithm to generate corresponding degree distribution. Through analysing the relationship between the performance of generated ripple size evolution and the parameters of RWA-B, they design an iterator greedy algorithm to search the optimal ripple size evolution for desired goals. As a result, they compare three goal-oriented degree distributions with others through numerical simulations. In binary erasure channel, both the memory usage oriented and block error rate (BER) oriented degree distributions outperform others with lowest average overhead, and the overhead oriented degree distribution outperforms others in terms of average overhead and average degree. In additive white Gaussian noise channel, the BER-oriented degree distribution outperforms others in terms of BER and average overhead. |
| Starting Page | 2658 |
| Ending Page | 2665 |
| Page Count | 8 |
| ISSN | 17518628 |
| Volume Number | 14 |
| e-ISSN | 17518636 |
| Issue Number | Issue 16, Oct (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/14/16 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0233 |
| Journal | IET Communications |
| Publisher Date | 2020-06-15 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Additive White Gaussian Noise Channel AWGN Channel BER-oriented Degree Distribution Binary Erasure Channel Code Curve Fitting Error Correction Code Error Statistics Generalised Degree Distribution Algorithm Generated Ripple Size Evolution Goal-oriented Degree Distribution Goal-oriented Luby Transform Code Greedy Algorithm Interpolation And Function Approximation Iterative Method Iterator Greedy Algorithm LT Code Numerical Analysis Numerical Simulation Optimal Degree Distribution Optimal Ripple Size Evolution Optimisation Technique Overhead Oriented Degree Distribution Random Processes Random Walk Algorithm-barrier RWA-B Statistics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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