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A Frequency-Domain Band-MMSE Equalizer for Continuous Phase Modulation over Frequency-Selective Time-Varying Channels

R. Chayot, N. Thomas, C. Poulliat, M.-L. Boucheret, G. Lesthievent, N. Van Wambeke
2018 2018 26th European Signal Processing Conference (EUSIPCO)  
Abstract-In this paper, we consider single carrier continuous phase modulations (CPM) over frequency selective time-varying channels.  ...  In this context, we propose a new low-complexity frequency-domain equalizer based on the minimum mean square error (MMSE) criterion exploiting efficiently the band structure of the associated channel matrix  ...  In this paper, we present a new Frequency-Domain Equalizer for CPM over time-varying and frequency selective channels.  ... 
doi:10.23919/eusipco.2018.8553241 dblp:conf/eusipco/ChayotTLWPB18 fatcat:y77s2zqe25annkzftercyw2ooe

Low Complexity Equalization of Orthogonal Chirp Division Multiplexing in Doubly-Selective Channels

Xin Wang, Zhe Jiang, Xiao-Hong Shen
2020 Sensors  
In this paper, we investigate an OCDM based modulation scheme termed uniform phase-Orthogonal Chirp Division Multiplexing (UP-OCDM) for high-speed communication over doubly selective channels.  ...  Based on the circulant transform matrix, we show that the channel matrices in UP-OCDM system over doubly selective channels have special structures that (1) the equivalent frequency-domain channel matrix  ...  Based on the circulant structure, two low complexity equalization methods are proposed for UP-OCDM over doubly selective channels. The first one is proposed in the frequency domain.  ... 
doi:10.3390/s20113125 pmid:32492855 fatcat:5b53xni6lnes5nupg5uw666wba

Performance modelling of turbo-coded non-ideal single-carrier and multi-carrier waveforms over wide-band Vogler-Hoffmeyer HF channels [chapter]

Fatih Genç, Mustafa Reşat, Asuman Savaşçhabeş, Özgür Ertuğ
2015 Electronics, Communications and Networks IV  
the effects of Carrier Frequency Offset (CFO), Symbol Timing Offset (STO) and phase noise in wide-band Vogler-Hoffmeyer HF channel model.  ...  Hence, in coded SC-FDE and coded OFDM systems; a very efficient, low complex frequency domain channel estimation and equalization are implemented in this paper.  ...  In practice, a wide-band radio channel has time-variant, frequency-selective and noisy properties.  ... 
doi:10.1201/b18592-15 fatcat:ohlnjztjtvgane66jjxstocsue

On the Comparative Performance Analysis of Turbo-Coded Non-Ideal Sigle-Carrier and Multi-Carrier Waveforms over Wideband Vogler-Hoffmeyer HF Channels

F. Genc, M. A. Resat, A. Savascihabes, O. Ertug
2014 Radioengineering  
of Carrier Frequency Offset (CFO), Symbol Timing Offset (STO) and phase noise in wide-band Vogler-Hoffmeyer HF channel model.  ...  This causes carrier frequency offset. Hence in coded SC-FDE and coded OFDM systems; a very efficient, low complex frequency domain channel estimation and equalization is implemented in this paper.  ...  In practice, a wide-band radio channel has time-variant, frequency-selective and noisy properties.  ... 
doaj:6eeaf629461448f8a3f180ea81f1e438 fatcat:enkahw5bxfb3vlelu2exr7gp7m

Comparative Analysis of Various Inter-Carrier Interference Cancellation Methods

Naresh Kumar, Gurleen Kaur, B.S. Sohi
2015 International Journal of Wireless and Microwave Technologies  
for a proper reception at the receiver.  ...  This paper provides a review of various inter carrier interference cancellation methods used in Orthogonal Frequency Division Multiplexing (OFDM) in the downlink of Long Term Evolution (LTE) and in many  ...  Apart from the above, a banded scheme [20] uses Block MMSE (jointly equalizes all sub-carriers) against serial MMSE (separately equalizes all sub-carriers) and makes use of band-structure of frequency-domain  ... 
doi:10.5815/ijwmt.2015.03.02 fatcat:fu2grh4dlzbwlmejuhm5sgnx6a

BER Evaluation in LTE SC-FDMA under Multipath Channels

2019 International journal of recent technology and engineering  
Channel equalization is very essential step in Single Carrier Frequency Division Multiple Access (SC-FDMA) transmission for overcoming the inter-symbol interference (ISI).  ...  This evaluation is performed for SCFDMA in uplink by aid of adaptive modulation techniques like QPSK.  ...  Generation of frequency domain for signal adds the OFDMA feature of good spectral efficiency instead of a time domain signal with modulation scheme.  ... 
doi:10.35940/ijrte.d7767.118419 fatcat:sm7fb6ub2rharapt3x4zb5zjcu

A Low Complexity Linear Moving Average Filtering Technique for PAR Reduction in OFDM Systems

Hassan Ali, Raziq Yaqub
2018 International Journal of Communications, Network and System Sciences  
Corresponding time domain linear equalizers are developed to recover originally transmitted data symbols.  ...  on the frequency selective Rayleigh fading channel transmission symbol-error-rate (SER) performance are investigated.  ...  In both the time and frequency domains, ZF and MMSE equalizers are seen to perform equally (although the Int. J.  ... 
doi:10.4236/ijcns.2018.1110012 fatcat:kmi4yndlhva6flshq5blaiqj6y

A Novel Strategy for Proficient Channel Limitation Equalizer

D. Sambasiva Rao, P. Lakshmi Naga Sindhu
2014 IOSR Journal of Electronics and Communication Engineering  
A time-domain equalizer (TEQ) employed in cascade with the channel yields an actual impulse response that is squatter than the channel impulse response.  ...  A symmetric TEQ halves FIR implementation density, enables parallel training of the frequency-domain equalizer and TEQ, reduces TEQ training complexity by a factor of 4 and doubles the length of the TEQ  ...  an M-band DMT system over a frequency-selective channel.  ... 
doi:10.9790/2834-09542940 fatcat:yv5p5esfframvnvibutgwbcfmy

Joint MAP equalization and channel estimation for frequency-selective and frequency-flat fast-fading channels

L.M. Davis, I.B. Collings, P. Hoeher
2001 IEEE Transactions on Communications  
This paper presents a new fractionally-spaced maximum a posteriori (MAP) equalizer for data transmission over frequency-selective fading channels.  ...  The technique is applicable to any standard modulation technique. The MAP equalizer uses an expanded hypothesis trellis for the purpose of joint channel estimation and equalization.  ...  It is transmitted over the channel using -ary symbols of period , with band-limited pulse shape . The physical frequency-selective fading channel has impulse response .  ... 
doi:10.1109/26.974257 fatcat:wem4irsnwvc7hjjpxpgsla26tq

DWMT transceiver equalization using overlap FDE for downlink ADSL

Arsla KHAN, Sobia BAIG, Tabassum NAWAZ
2015 Turkish Journal of Electrical Engineering and Computer Sciences  
This paper proposes the application of overlap frequency domain equalization (OFDE) in DWMT modulated systems and compares the bit error rate (BER) performance with time domain equalization (TDE) technique  ...  It is shown through simulation results that minimum mean square error (MMSE) based OFDE can be applied as an equalization technique for a downlink asymmetric DSL (ADSL) channel with lower computational  ...  Efficient and reliable communication over such a frequency selective and noisy channel requires a robust modulation technique, which is proposed to be DWMT modulation.  ... 
doi:10.3906/elk-1212-50 fatcat:roo4kvpukfggbc7vj77jfqtx5y

OFDM or single-carrier block transmissions?

Zhengdao Wang, Xiaoli Ma, G.B. Giannakis
2004 IEEE Transactions on Communications  
We compare two block transmission systems over frequency-selective fading channels: orthogonal frequency-division multiplexing (OFDM) versus single-carrier modulated blocks with zero padding (ZP).  ...  We first compare their peak-to-average power ratio (PAR) and the corresponding power amplifier backoff for phase-shift keying or quadrature amplitude modulation.  ...  ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their comments and suggestions, which helped improve the quality of the paper.  ... 
doi:10.1109/tcomm.2004.823586 fatcat:aelzu4zz3jc2jdxlbu25l52zne

Joint DFT Precoding and Discrete Wavelet Transform in SC-FDMA NOMA System with Carrier Frequency Offset Compensation

2022 TAGA Journal  
Moreover, we have investigated the performance of the proposed system with variations in carrier frequency offset (CFO) to show the supremacy of the proposed SC-FDMA NOMA System over multipath channels  ...  This study proposes a transceiver structure for SC-FDMA based NOMA systems using discrete wavelet transform (DWT).  ...  Single carrier (SC) systems using frequency domain equalization (FDE) have gained unlimited attention over SC systems operating in the time domain, offering higher data rates with a low peak to average  ... 
doi:10.37896/pd91.4/91463 fatcat:2yghjj3tyngqjgnwn7pcr6nu3e

Partial Fractional Fourier Transform (PFrFT)-MIMO-OFDM for Known Underwater Acoustic Communication Channels

Yixin Chen, Carmine Clemente, John J. Soraghan
2021 Information  
Communication over doubly selective channels (both time and frequency selective) suffers from significant intercarrier interference (ICI).  ...  A new iterative band minimum mean square error (BMMSE) weight combining based on LDLH factorization is used in a scenario of perfect knowledge of channel information.  ...  Banded MMSE equalization is used.  ... 
doi:10.3390/info12110469 fatcat:n37o7lr5z5ajxlvcgouyv5w3te

Channel Estimation in MIMO-OFDM System

SR Aryal, H Dhungana
2014 Nepal Journal of Science and Technology  
There are no limit of human desire, so day by day we need much higher data speed to facilitate our need but every physical resource like frequency band, transmit signal strength are finite.  ...  In order to recover the transmitted signal correctly, channel effect must be estimated and repaired at receiver.  ...  Shashidhar Ram Joshi for his continuous support during the study.  ... 
doi:10.3126/njst.v14i2.10421 fatcat:chvsrtqegvay7dxx4ibfpdlepy

Iterative Per-Vector Equalization for Orthogonal Signal-Division Multiplexing Over Time-Varying Underwater Acoustic Channels

Jing Han, Sundeep Prabhakar Chepuri, Qunfei Zhang, Geert Leus
2018 IEEE Journal of Oceanic Engineering  
The channel Doppler effect after front-end resampling is modeled as a common time-varying phase on all propagation paths.  ...  Orthogonal signal-division multiplexing (OSDM) is a promising modulation scheme that provides a generalized framework to unify orthogonal frequency-division multiplexing (OFDM) and single-carrier frequency-domain  ...  over time-varying UWA channels.  ... 
doi:10.1109/joe.2017.2787898 fatcat:7jakzosgprhn5kbg4w7y3lcxgq
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