|Title of host publication||IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2007), Athens|
|Publisher or commissioning body||Institute of Electrical and Electronics Engineers (IEEE)|
|Publication date||Sep 2007|
|Pages||1 - 5|
|Number of pages||5|
|Conference||18th International Symposium on Personal, Indoor and Mobile Radio Communications (2007)|
|Period||1/09/07 → …|
Expectations and requirements for future wireless communication systems continue to grow and evolve. Thus, recently, the Third Generation Partnership Project (3GPP) has considered the Long Term Evolution (LTE) of 3G - also known as Super 3G - to ensure its competitiveness in the future. It is generally assumed that the downlink of the new air interface would be OFDMA based and that some form of Hybrid ARQ (HARQ) might be employed. This paper aims to evaluate the performance of various HARQ schemes over the OFDMA downlink of the currently proposed 3GPP LTE specification. Schemes are compared in terms of throughput and PER in the context their differing memory requirements for implementation. Simulation results show that Type II Incremental Redundancy offers the best throughput performance but at the cost of higher memory requirement. However, when the schemes are enhanced with subcarrier and constellation rearrangement techniques, the performance gap between the different HARQ types is reduced significantly.
Rose publication type: Conference contribution
Additional information: With accompanying conference presentation
Sponsorship: This project is funded as part of the Core 4 Research Programme of the Virtual Centre of Excellence in Mobile & Personal Communications, Mobile VCE, (www.mobilevce.com), whose funding support, including that of EPSRC is gratefully acknowledged.
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- 3GPP LTE, OFDMA, hybrid ARQ, chase Combining, incremental redundancy
18th International Symposium on Personal, Indoor and Mobile Radio Communications (2007)
|Duration||1 Sep 2007 → …|