An achievable Pre-log Region for the Non-coherent Block Fading MIMO Multiple Access Channel
Conference: ISWCS 2013 - The Tenth International Symposium on Wireless Communication Systems
08/27/2013 - 08/30/2013 at Ilmenau, Deutschland
Proceedings: ISWCS 2013
Pages: 5Language: englishTyp: PDF
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Authors:
Utkovski, Zoran (Faculty of Computer Science, University Goce Delcev Štip, R. Macedonia )
Ilik, Danko; Kocarev, Ljupco (Laboratory for Complex Systems and Networks, Macedonian Academy of Sciences and Arts)
Abstract:
We study the two-user MIMO block fading MAC in the non-coherent setting, where the terminals have neither transmit nor receive knowledge of the channel realizations. We propose a joint transmission scheme and derive the prelog region achievable by the proposed scheme, by applying a geometric approach. The geometric approach is based on the understanding of the geometric structures which arise as relevant to the problem of communicating non-coherently over the multiple access channel. We show that the proposed scheme achieves the pre-log upper bound for the sum-rate. Comparison with TDMA (both coherent and non-coherent) indicates that in most of the scenarios of practical relevance, the proposed transmission scheme outperforms TDMA.