Throughput Analysis of Hybrid-ARQ -A Matrix Exponential Distribution Approach
2016 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 64, no 1, 416-428 p.Article in journal (Refereed) PublishedText
We propose a novel performance analysis framework for lossless- and truncated-hybrid automatic repeat request (HARQ) that enables neat, general, closed-form throughput expressions in a matrix exponential (ME) distribution form. This approach is applicable to all HARQ schemes for which the probability density function of the effective channel can be characterized by a rational Laplace transform, or equivalently, an ME-distribution. This includes, for example, repetition redundancy HARQ in ME distributed channels. Throughput expressions are also given for the K-truncated-HARQ N-fold diversity, ARQ N-fold diversity, and lossless-HARQ 2-fold diversity cases in the ME distributed channel. Schemes with effective channels of non-rational Laplace transforms, such as IR-HARQ, are explored using truncated continued fractions. A novel integration trick is developed for the integration of ME distributions with singular matrices and yields the simple throughput expression of lossless-HARQ. We also give general analytical expressions for the optimal throughput and optimal rate point that benefit from the compact ME-distribution form proposed.
Place, publisher, year, edition, pages
IEEE Press, 2016. Vol. 64, no 1, 416-428 p.
Hybrid-ARQ (HARQ), lossless-HARQ, truncated-HARQ, retransmission, repetition redundancy, chase combining, incremental redundancy, ARQ, throughput, matrix exponential distribution, rational Laplace transform, performance optimization
IdentifiersURN: urn:nbn:se:kth:diva-182166DOI: 10.1109/TCOMM.2015.2501294ISI: 000368353700036ScopusID: 2-s2.0-84958149474OAI: oai:DiVA.org:kth-182166DiVA: diva2:904102
QC 201602182016-02-182016-02-162016-02-18Bibliographically approved