Scattered-pilot channel estimation for GFDM

Vilaipornsawai, Usa; Jia, Mingxing

doi:10.1109/wcnc.2014.6952274

Cited by 36 publications

(25 citation statements)

References 8 publications

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“…The signal is then transmitted through the frequency selective multipath fading channel ℎ( ). The signal received can be represented as [5] […”

Section: Mgfdm Signal Modelmentioning

confidence: 99%

“…Reference [5] introduces two scattered pilot based channel estimation methods for GFDM, Pilot Interference Cancellation (IC) and Transmitter IC. The article gives an insight into interference cancellation at either the transmitter or the receiver of the communication system.…”

Section: Introductionmentioning

confidence: 99%

“…There are very few papers available in the literature for GFDM signal channel estimation [5] and to the best of the authors knowledge there is no literature covering channel estimation using Least Squares (LS) and Minimum Mean Square Error (MMSE) and in combination with DFT to multitaper GFDM. These methods are well discussed in the past for various multicarrier signals.…”

Section: Introductionmentioning

confidence: 99%

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Training Based Channel Estimation for Multitaper GFDM System

Bandari¹,

Vakamulla²,

Drosopoulos³

2017

Mobile Information Systems

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Recent activities in the cellular network world clearly show the need to design new physical layer waveforms in order to meet future wireless requirements. Generalized Frequency Division Multiplexing (GFDM) is one of the leading candidates for 5G and one of its key features is the usage of circular pulse shaping of subcarriers to remove prototype filter transients. Due to the nonorthogonal nature of the conventional GFDM system, inherent interference will affect adversely channel estimation. With Discrete Prolate Spheroidal Sequences (DPSSs) or multitapers as prototype filters an improved orthogonal GFDM system can be developed. In this work, we investigate channel estimation methods for multitaper GFDM (MGFDM) systems with and without Discrete Fourier Transform (DFT). The simulation results are presented using Least Squares (LS) and Minimum Mean Square Error (MMSE) channel estimation (CE) methods. DFT based CE methods provide better estimates of the channel but with an additional computational cost.

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“…The signal is then transmitted through the frequency selective multipath fading channel ℎ( ). The signal received can be represented as [5] […”

Section: Mgfdm Signal Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Training Based Channel Estimation for Multitaper GFDM System

Bandari¹,

Vakamulla²,

Drosopoulos³

2017

Mobile Information Systems

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“…Additionally, accurate channel estimation is of a paramount importance in any practical communication system. To this end, Vilaipornsawai and Jia have proposed an estimation method that finds the channel impulse response (CIR) using a number of scattered pilots in a GFDM block through the least squares (LS) criterion. In a more recent work, Ehsanfar et al have proposed two channel estimation methods based on the LS and linear minimum mean square error (MSE) criteria that is applicable to multiple‐input–multiple‐output GFDM.…”

Section: Introductionmentioning

confidence: 99%

Maximum‐likelihood synchronization and channel estimation with multiuser detection in GFDMA

Shayanfar

Saeedi-Sourck

Farhang

et al. 2018

Trans Emerging Tel Tech

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Accurate estimation and correction of channel distortions and carrier frequency offset (CFO) are of a great importance in any multicarrier communication system. Hence, in this paper, we propose data‐aided CFO and channel estimation techniques for both multiuser uplink and downlink of the generalized frequency division multiple access (GFDMA). Our proposed solutions jointly estimate the CFO and channel responses based on the maximum‐likelihood criterion. To simplify the implementation of the proposed estimation algorithms, we suggest a preamble composed of two similar Zadoff‐Chu training sequences in a generalized frequency division multiplexing block. It is worth mentioning that our proposed technique can estimate both integer and fractional CFO values without any limitation on the acquisition range of CFO. In the uplink phase, each user aligns its carrier frequency with the base station using the estimated CFO in the downlink. However, the CFO estimates may get outdated for the uplink transmission. Thus, residual CFOs may still remain in the received signal at the base station. While being trivial in the downlink, CFO correction is a challenging task in the uplink. Thus, we also propose a joint CFO correction and channel equalization technique for the uplink of GFDMA systems. Finally, we evaluate our proposed estimation and correction algorithms in terms of estimation mean square error and bit error rate performance through simulations.

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“…It is important to stress that in both the GFDM and the FBMC approaches, both ICI and ISI will be experienced due to the lack of ortogonality which is introduced by the non-rectanguler filter. In [19] and [20] suitable techniques are presented which allow to cancel interference.…”

Section: Introductionmentioning

confidence: 99%

Frame design for 5G multicarrier modulations

Morosi

Biagini

Argenti

et al. 2015

2015 International Wireless Communications and Mobile Computing Conference (IWCMC)

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Abstract-Orthogonal Frequency Division Multiplexing (OFDM) transmission technique has been considered for the 4G LTE-Advanced system because of its high performance and low complexity. In the new 5G scenario this type of modulation is not properly suited because of the additional requirements for very high spectral efficiency, low latency and low out-of-band (OOB) emissions. Thus, new waveforms have been chosen to replace it and effectively deal with these problems. Particularly, recently proposed multicarrier techniques as the Generalized Frequency Division Multiplexing (GFDM) and the Filter Bank Multicarrier (FBMC) modulations are two of the main candidates techniques for the new 5G standard. As for classical OFDM technique, the channel estimation is a crucial functionality for the all multicarrier approaches. In this paper we generalize a recently proposed method for the computation of the MSE on the time-frequency domain for pilot based channel estimation techniques in multicarrier system. This method permits to determine the most suitable channel estimation algorithm for a given wireless channel as well as to define the suitable pilot density in order to afford a target MSE value for a given SNR level. Hence, in this paper a general design tool for multicarrier systems is proposed.

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Scattered-pilot channel estimation for GFDM

Cited by 36 publications

References 8 publications

Training Based Channel Estimation for Multitaper GFDM System

Training Based Channel Estimation for Multitaper GFDM System

Maximum‐likelihood synchronization and channel estimation with multiuser detection in GFDMA

Frame design for 5G multicarrier modulations

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