Block Channel Equalization in the Frequency Domain

Pancaldi, Fabrizio; Vitetta, G.M.

doi:10.1109/tcomm.2005.843412

Cited by 46 publications

(26 citation statements)

References 21 publications

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“…According to the introduction of the above equalizations, we take the channel model introduced in [3]. Each path has independent Rayleigh fading and its time delay power spectrum decayed as exponent distribution.…”

Section: Simulation Resultsmentioning

confidence: 99%

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A Low-Complexity Decision-Feedback Equalization Based on Noise-Prediction

Li¹,

Xu²

2017

2017 2nd International Conference on Mechatronics and Information Technology (ICMIT 2017)

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Abstract:It is necessary to equalize the received signals to weaken serious multipath effects in troposcatter communication systems. According to the multipath channel model in scatter communication systems mentioned in related papers, a low-complexity decision-feedback equalization based on noise-prediction is proposed by partial coefficients of curve fitting prediction in nonlinear decision feedback equalizer when time delay power spectrum is under the condition of exponential decay. Simulation results showed that the method proposed in this paper has a lower complexity as well as good BER performance.

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Section: Simulation Resultsmentioning

confidence: 99%

“…At present, it has been discussed and researched extensively using linear frequency-domain equalizations based on zero-forcing (ZF) and minimum mean square error (MMSE) method [2][3][4]. Furthermore, a nonlinear decision-feedback equalization fully using the output of decoder in both time and frequency domain is proposed [5].…”

Section: Introductionmentioning

confidence: 99%

A Low-Complexity Decision-Feedback Equalization Based on Noise-Prediction

Li¹,

Xu²

2017

2017 2nd International Conference on Mechatronics and Information Technology (ICMIT 2017)

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“…Various SC-FDE-DFE structures can be roughly divided into two categories. The first category of SC-FDE-DFE has a hybrid equalization structure, whereas SC-FDE, which acts as feedforward equalizer, is augmented with a TD transversal filter for feedback equalization [8]- [14]. Calculating the tap vector of the TD feedback filter requires a matrix inversion operation, which is computationally expensive, particularly for long TD feedback filters.…”

Section: Introductionmentioning

confidence: 99%

Single-Carrier Frequency-Domain Equalization With Hybrid Decision Feedback Equalizer for Hammerstein Channels Containing Nonlinear Transmit Amplifier

Chen

Hong

Khalaf

et al. 2017

IEEE Trans. Wireless Commun.

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Abstract-We propose a nonlinear hybrid decision feedback equalizer (NHDFE) for single-carrier (SC) block transmission systems with nonlinear transmit high power amplifier (HPA), which significantly outperforms our previous nonlinear SC frequency-domain equalization (NFDE) design. To obtain the coefficients of the channel impulse response (CIR) as well as to estimate the nonlinear mapping and the inverse nonlinear mapping of the HPA, we adopt a complex-valued (CV) B-spline neural network approach. Specifically, we use a CV B-spline neural network to model the nonlinear HPA, and we develop an efficient alternating least squares scheme for estimating the parameters of the Hammerstein channel, including both the CIR coefficients and the parameters of the CV B-spline model. We also adopt another CV B-spline neural network to model the inversion of the nonlinear HPA, and the parameters of this inverting B-spline model can be estimated using the least squares algorithm based on the pseudo training data obtained as a natural byproduct of the Hammerstein channel identification. The effectiveness of our NHDFE design is demonstrated in a simulation study, which shows that the NHDFE achieves a signalto-noise ratio gain of 4 dB over the NFDE at the bit error rate level of 10 −4 .Index Terms-Single-carrier block transmission, decision feedback equalizer, nonlinear high power amplifier, Hammerstein channel, complex-valued B-spline neural network

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“…Frequency-domain equalization (FDE) is commonly used for OFDMA. This includes frequency domain linear equalization (FD-LE) [4], decision feedback equalization (DFE) [5,6], and the more recent turbo equalization (TE) [7,8]. FD-LE is analogous to time-domain LE.…”

Section: Introductionmentioning

confidence: 99%

Frequency-domain equalization for OFDMA-based multiuser MIMO systems with improper modulation schemes

Xiao

Lin

Fagan

et al. 2011

EURASIP J. Adv. Signal Process.

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In this paper, we propose a novel transceiver structure for orthogonal frequency division multiple access-based uplink multiuser multiple-input multiple-output systems. The numerical results show that the proposed frequencydomain equalization schemes significantly outperform conventional linear minimum mean square error-based equalizers in terms of bit error rate performance with moderate increase in computational complexity.

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Block Channel Equalization in the Frequency Domain

Cited by 46 publications

References 21 publications

A Low-Complexity Decision-Feedback Equalization Based on Noise-Prediction

A Low-Complexity Decision-Feedback Equalization Based on Noise-Prediction

Single-Carrier Frequency-Domain Equalization With Hybrid Decision Feedback Equalizer for Hammerstein Channels Containing Nonlinear Transmit Amplifier

Frequency-domain equalization for OFDMA-based multiuser MIMO systems with improper modulation schemes

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