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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ali, U. Kieffer, M. Duhamel, P. |
| Copyright Year | 2009 |
| Description | Author affiliation: L2S, CNRS - SUPELEC - Univ Paris-Sud - 91192 Gif-sur-Yvette, FRANCE (Ali, U.; Kieffer, M.; Duhamel, P.) |
| Abstract | In many communication protocols, small packets are aggregated into larger packets (bursts) at some layer of the protocol stack before being forwarded to to the lower layer. Upon reception, the beginning of the burst has to be detected, and it has to be segmented to recover the small packets. Usually, this task is performed by hard decision on the received data. Obviously, if the burst is affected by transmission errors, many packets are likely to be erroneously segmented. Error detection and retransmission are usually employed to solve this problem, reducing the throughput. This paper proposes a robust aggregated packet header recovery mechanism able to significantly reduce the segmentation error. This technique is applied to the IEEE 802.16 PHY layer, where MAC bursts are segmented into MAC packets. The aggregation of MAC packets is modeled as a Markov process. The possible successions of MAC packets forming a burst are described by a trellis. A BCJR-like algorithm then provides a posteriori probabilities of packet boundaries. Simulation results show that the proposed method outperforms the conventional hard decision decoder by more than 8 dB in SNR. |
| Starting Page | 672 |
| Ending Page | 676 |
| File Size | 288204 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781424436958 |
| DOI | 10.1109/SPAWC.2009.5161870 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-06-21 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Decoding Robustness WiMAX Media Access Protocol Redundancy Physical layer Throughput Propagation losses Multimedia communication Broadcasting |
| Content Type | Text |
| Resource Type | Article |
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