- Title
- Performance analysis and optimization of LT codes with unequal recovery time and intermediate feedback
- Creator
- Abbas, Rana; Shirvanimoghaddam, Mahyar; Li, Yonghui; Vucetic, Branka
- Relation
- 2016 IEEE International Conference on Communications. Proceedings of the 2016 IEEE International Conference on Communications (Kuala Lumpur, Malaysia 23-27 May, 2016)
- Publisher Link
- http://dx.doi.org/10.1109/ICC.2016.7511554
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- conference paper
- Date
- 2016
- Description
- In this paper, we analyze Luby Transform (LT) codes with unequal recovery time (URT-LT) and intermediate feedback. Different sets of information symbols within a message block are allocated different priorities, where the higher prioritized sets are to be recovered in a shorter time. We divide the encoding process into stages where in each stage different sets are allocated different selection probabilities. A stage ends when one of the sets' recovery times expires. We incorporate an intermediate feedback that notifies the transmitter of the recovered information symbols at the end of each stage. These recovered symbols are then excluded from future encoding. We use the AND-OR tree analysis to find the optimal selection probabilities that guarantee the sets are recovered within the required time, with a relatively small error probability. We compare the scheme to the case where the sets are encoded and transmitted separately.
- Subject
- error probability; performance analysis; information symbol; AND-OR tree analysis; optimal selection probability; optimization; LT code; unequal recovery time; intermediate feedback; Luby transform code; URT-LT; message block; encoding process
- Identifier
- http://hdl.handle.net/1959.13/1344355
- Identifier
- uon:29410
- Identifier
- ISBN:9781479966646
- Language
- eng
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