Improving SC-FDMA Performance by Turbo Equalization in UTRA LTE Uplink

Berardinelli, Gilberto; Priyanto, Basuki Endah; Sørensen, Troels B.; Mogensen, Preben

doi:10.1109/vetecs.2008.562

Cited by 56 publications

(41 citation statements)

References 14 publications

(18 reference statements)

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“…In recent years, several schemes were proposed to perform interference cancellation in LTE downlink [3] and uplink [4][5][6][7][8][9][10]. However, few papers exist on low complexity implementation for software defined radio (SDR).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, this scheme has many disadvantages for real time implementation. In papers [6][7][8][9][10], the log-likelihood ratios (LLR) from the channel decoder are sent back to the frequency domain to achieve interference cancellation. These schemes are similar to [5], but with an even longer feedback loop, which is from the channel decoder to the FDE.…”

Section: Introductionmentioning

confidence: 99%

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LTE uplink MIMO receiver with low complexity interference cancellation

Yin

Cavallaro

2012

Analog Integr Circ Sig Process

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In LTE/LTE-A uplink receiver, frequency domain equalizers (FDE) are adopted to achieve good performance. However, in multi-tap channels, the residual inter-symbol and inter-antenna interference still exist after FDE and degrade the performance. Conventional interference cancellation schemes can minimize this interference by using frequency domain interference cancellation. However, those schemes have high complexity and large feedback latency, especially when adopting a large number of iterations. These result in low throughput and require a large amount of resource in software defined radio implementation. In this paper, we propose a novel low complexity interference cancellation scheme to minimize the residual interference in LTE/LTE-A uplink. Our proposed scheme can bring about 2 dB gains in different channels, but only adds up to 7.2 % complexity to the receiver. The scheme is further implemented on Xilinx FPGA. Compared to other conventional interference cancellation schemes, our scheme has less complexity, less data to store, and shorter feedback latency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

LTE uplink MIMO receiver with low complexity interference cancellation

Yin

Cavallaro

2012

Analog Integr Circ Sig Process

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“…In [6], [7], various turbo FD-LE schemes conceived for diverse single-carrier multiple-input multiple-output (MIMO) systems were investigated. Rather than using a LE in the FD, the DFE principle relying on interference cancellation (IC), either successive IC (SIC) 1 The work reported in this paper has formed part of the Core 5 Research Programme of the Virtual Center of Excellence in Mobile and Personal Communications, Mobile VCE, www.mobilevce.com, whose funding support, including that of EPSRC, is gratefully acknowledged.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Domain Turbo Equalisation in Coded SC-FDMA Systems: EXIT Chart Analysis and Performance

Zhang

Yang

Hanzo

2012

2012 IEEE Vehicular Technology Conference (VTC Fall)

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“…SC-FDMA can be used with a range of single carrier Frequency Domain Equalization (FDE) techniques to combat the frequency selective nature of the transmission channel. These include frequency-domain Linear Equalization (LE), Decision Feedback Equalization (DFE) and the more recent Turbo Equalization [5]. Frequency-domain LE is analogous to time-domain LE.…”

Section: Introductionmentioning

confidence: 99%