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http://dx.doi.org/10.7840/kics.2013.38A.5.443

User Pairing and Resource Allocation for DFTS-OFDMA Uplink Systems Using Virtual MIMO  

Shin, Dong Ryul (경희대학교 전자전파공학과)
Wang, Jinsoo (경희대학교 전자전파공학과)
Kim, Yun Hee (경희대학교 전자전파공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38A, no.5, 2013 , pp. 443-450 More about this Journal
Abstract
We consider user pairing and resource allocation for the uplink of cellular systems employing virtual multiple input multiple output (MIMO). As a multiple access scheme, discrete Fourier transform spread orthogonal frequency division multiple access (DFTS-OFDMA) is adopted for more flexible resource allocation than single carrier (SC)-OFDMA adopted in the Long Term Evolution (LTE) system. We formulate the optimization problems of user pairing and resource allocation to maximize the throughput of the DFTS-OFDMA system under different constraints. The DFTS-OFDMA allowing non-contiguous subcarrier allocation and redundant user assignment provides a better throughput than the SC-FDMA at lower complexity in finding the optimal solution but at the cost of the increased control information indicating the allocated resources.
Keywords
Virtual MIMO; DFTS-OFDMA; User pairing; Resource allocation; Throughput;
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