Analysis of receiver algorithms for lte LTE SC-FDMA based uplink MIMO systems

Lin, Zihuai; Xiao, Pei; Vucetic, Branka; Sellathurai, Mathini

doi:10.1109/twc.2010.01.090199

Cited by 63 publications

(33 citation statements)

References 12 publications

(6 reference statements)

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“…The division by 2 in (41) is because the final symbol decision is only done on the real estimate [18]. Since [14] does not specify well A 1 and A 2 , (41) clarifies the calculation of the SINR for a SC-FDE system using widely linear MMSE equalization in the SISO case.…”

Section: Sinr For the Wl-mmse Receivermentioning

confidence: 99%

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Widely linear MMSE precoding and equalization techniques for SC-FDE systems

Chang

Rocha

Ruyet

et al. 2014

EURASIP J. Adv. Signal Process.

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Single-carrier systems using frequency-domain equalization (SC-FDE) systems were proposed to overcome the low robustness to carrier frequency offset (CFO) and high peak-to-average-power ratio (PAPR) inherent to regular orthogonal frequency-division multiplexing (OFDM) systems. Usually, linear minimum mean square error (MMSE) equalization is used to compensate the channel effect, since maximum likelihood (ML) detection is computationally impractical. However, if the transmitted signal comes from an improper constellation, widely linear processing can be used to take advantage of all the available second-order statistics from this transmitted signal, obtaining this way a performance gain when compared to the strictly linear case. In this paper, a SC-FDE system employing widely linear MMSE equalization is proposed in its regular and decision-feedback (DFE) versions. A SC-FDE system employing widely linear MMSE Tomlinson-Harashima precoding (THP) and equalization is also proposed. With Tomlinson-Harashima precoding, the error propagation problem observed in systems using a decision-feedback equalizer vanishes, because the feedback processing is done at the transmitter. Simulation results show that together with the error performance gain, these systems have lower sensibility to the feedback filter length in systems using decision-feedback equalizers. In Tomlinson-Harashima precoded systems, the performance gain is observed even with channel estimation/channel state information errors.

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Section: Sinr For the Wl-mmse Receivermentioning

confidence: 99%

“…In multicarrier systems, the use of widely linear equalization to make these systems resistant to narrowband interference was proposed in [13]. A widely linear equalizer for SC-FDE systems was proposed in [14].…”

Section: Introductionmentioning

confidence: 99%

Widely linear MMSE precoding and equalization techniques for SC-FDE systems

Chang

Rocha

Ruyet

et al. 2014

EURASIP J. Adv. Signal Process.

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“…Then an N FFT will be applied to transform the signal sequences into frequency domain sequences. After subcarrier demapping, M symbols will be send to the MMSE Detector [8] donates the frequency domain received symbol on the mth subcarrier on the N R receive antennas.…”

Section: System Modelmentioning

confidence: 99%

A Novel User Pairing Algorithm for Lte Femtocell Uplink

Wang

Xu²

2013

Proceedings of the 2nd International Conference on Advances in Computer Science and Engineering

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“…In DFT-precoded-OFDM systems, the MMSE-DFE [18][19][20] equalizer can be implemented efficiently using a frequency domain FFF followed by a time domain DFE [21][22][23][24][25][26][27][28][29][30][31]. Computation of FFF and feedback filters (FBF) for DFT-precoded-OFDM differs from conventional singlecarrier methods.…”

Section: Introductionmentioning

confidence: 99%

Performance limits of conventional and widely linear DFT-precoded-OFDM receivers in wideband frequency-selective channels

Kuchi

2014

J Wireless Com Network

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This paper describes the limiting behavior of linear and decision feedback equalizers (DFEs) in single/multiple antenna systems employing real/complex-valued modulation alphabets. The wideband frequency-selective channel is modeled using a Rayleigh fading channel model with infinite number of time domain channel taps. Using this model, we show that the considered equalizers offer a fixed post detection signal-to-noise ratio (post-SNR) at the equalizer output that is close to the matched filter bound (MFB). General expressions for the post-SNR are obtained for zero-forcing (ZF)-based conventional receivers as well as for the case of receivers employing widely linear (WL) processing. Simulation is used to study the bit error rate (BER) performance of both minimum-mean-square-error (MMSE) and ZF-based receivers. Results show that the considered receivers advantageously exploit the rich frequency-selective channel to mitigate both fading and inter-symbol interference (ISI) while offering a performance comparable to the MFB.

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Analysis of receiver algorithms for lte LTE SC-FDMA based uplink MIMO systems

Cited by 63 publications

References 12 publications

Widely linear MMSE precoding and equalization techniques for SC-FDE systems

Widely linear MMSE precoding and equalization techniques for SC-FDE systems

A Novel User Pairing Algorithm for Lte Femtocell Uplink

Performance limits of conventional and widely linear DFT-precoded-OFDM receivers in wideband frequency-selective channels

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