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Finite Block-length Analysis of the Incremental Redundancy HARQ

Behrooz Makki (Institutionen för signaler och system, Kommunikationssystem) ; Tommy Svensson (Institutionen för signaler och system, Kommunikationssystem) ; Michele Zorzi
IEEE Wireless Communications Letters (2162-2337). Vol. 3 (2014), 5, p. 529-532.
[Artikel, refereegranskad vetenskaplig]

This letter studies the power-limited throughput of a communication system utilizing incremental redundancy (INR) hybrid automatic repeat request (HARQ). We use some recent results on the achievable rates of finite-length codes to analyze the system performance. With codewords of finite length, we derive closed-form expressions for the outage probabilities of INR HARQ and study the throughput in the cases with variable-length coding. Moreover, we evaluate the effect of feedback delay on the throughput and derive sufficient conditions for the usefulness of the HARQ protocols, in terms of power-limited throughput. The results show that, for a large range of HARQ feedback delays, the throughput is increased by finite-length coding INR HARQ, if the sub-codeword lengths are properly adapted.



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Denna post skapades 2014-09-11. Senast ändrad 2015-03-30.
CPL Pubid: 202607

 

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