Efficient Transmitter and Receiver Designs for SC-FDMA Based Heterogeneous Networks

Daniel Castanheira, Adao Silva, Rui Dinis, Atilio Gameiro

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

In this manuscript, we consider the uplink of a single carrier frequency division multiple access (SC-FDMA) based system, where a set of small-cells coexist with a macro-cell using the same spectrum. To deal with both the inter-carrier interference (ICI) and inter-system interference, we combine interference alignment (IA) precoding at the small-cell transmitters with iterative decision feedback equalization at the macro-receiver. The transmitter and receiver design is performed jointly by considering both full-coordination and limited inter-system information exchange between macro- and small-cells. At the small cells side, we assume that the access points are connected through a limited capacity backhaul network to a central unit, where the separation of a quantized version of the small-cell signals is performed. For this case, the iterative feedback equalizer is designed by explicitly taking into account the impact of signal quantization. Moreover, a semi-analytical approach for the performance of the proposed schemes is provided. The results show that the proposed schemes are robust to both inter-system and inter-carrier interferences and thus are able to efficiently separate the macro- and small-cells spatial streams under limited information exchange.

Original languageEnglish
Article number7109846
Pages (from-to)2500-2510
Number of pages11
JournalIEEE Transactions on Communications
Volume63
Issue number7
DOIs
Publication statusPublished - 1 Jul 2015

Keywords

  • Heterogeneous Networks
  • IB-DFE
  • Interference Alignment
  • Quantization
  • SC-FDMA

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