Channel Estimation for SC-FDE Systems Using Frequency Domain Multiplexed Pilots

Lam, Chan‐Tong; Falconer, D.D.; Danilo-Lemoine, F.; Dinis, Rui

doi:10.1109/vtcf.2006.301

Cited by 50 publications

(32 citation statements)

References 19 publications

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“…We describe a low-pass OFDM signal in (8) where X k depicts the data symbols, N is the total number of subcarriers and the symbol length is represented by T υptq " There is a need to prevent intersymbol interference, so we insert a guard interval of length T g immediately before the OFDM block. A cyclic prefix is transmitted during the guard interval so that the signals in the intervals´T g ď t ă 0 and T´T g ď t ă T remain equal.…”

Section: System Characterizationmentioning

confidence: 99%

Efficient channel estimation using TCH codes

Lopes

Catarino

Cercas

et al. 2017

2017 9th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)

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Section: System Characterizationmentioning

confidence: 99%

Efficient channel estimation using TCH codes

Lopes

Catarino

Cercas

et al. 2017

2017 9th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)

Self Cite

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“…2. The pilot inserting method is known as the Frequency Expanding Technique [15]. Generally, a comb-pilot pattern is used, as shown in Fig.…”

Section: Formulation Of Channel Estimationmentioning

confidence: 99%

Sparse Channel Estimation of Single Carrier Frequency Division Multiple Access Based on Compressive Sensing

2015

J Inf Process Syst

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It is widely accepted that single carrier frequency division multiple access (SC-FDMA) is an excellent candidate for broadband wireless systems. Channel estimation is one of the key challenges in SC-FDMA, since accurate channel estimation can significantly improve equalization at the receiver and, consequently, enhance the communication performances. In this paper, we study the application of compressive sensing for sparse channel estimation in a SC-FDMA system. By skillfully designing pilots, their patterns, and taking advantages of the sparsity of the channel impulse response, the proposed system realizes channel estimation at a low cost. Simulation results show that it can achieve significantly improved performance in a frequency selective fading sparse channel with fewer pilots.

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“…Based on the authors best knowledge, the effects of increased PP or PAPR on the spectral regrowth have not been taken into account in the recent literature in the performance comparisons between DDST and TDMT systems. More traditional SI-based training was studied in [7], where the frequency bins were in some cases nulled for improved channel estimation performance. The PAPR problem was discussed without any solutions to decrease the PAPR created by the SI pilots.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of time-multiplexed and data-dependent superimposed training based transmission with practical power amplifier model

Levanen

Talvitie

Renfors

2012

J Wireless Com Network

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The increase in the peak-to-average power ratio (PAPR) is a well known but not sufficiently addressed problem with data-dependent superimposed training (DDST) based approaches for channel estimation and synchronization in digital communication links. In this article, we concentrate on the PAPR analysis with DDST and on the spectral regrowth with a nonlinear amplifier. In addition, a novel Gaussian distribution model based on the multinomial distribution for the cyclic mean component is presented. We propose the use of a symbol level amplitude limiter in the transmitter together with a modified channel estimator and iterative data bit estimator in the receiver. We show that this setup efficiently reduces the regrowth with the DDST. In the end, spectral efficiency comparison between time domain multiplexed training and DDST with or without symbol level limiter is provided. The results indicate improved performance for DDST based approaches with relaxed transmitter power amplifier requirements.

show abstract

Channel Estimation for SC-FDE Systems Using Frequency Domain Multiplexed Pilots

Cited by 50 publications

References 19 publications

Efficient channel estimation using TCH codes

Efficient channel estimation using TCH codes

Sparse Channel Estimation of Single Carrier Frequency Division Multiple Access Based on Compressive Sensing

Performance evaluation of time-multiplexed and data-dependent superimposed training based transmission with practical power amplifier model

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