Low complexity bit mapping algorithm for multi-carrier communication systems with fading channels

2002 ◽  
Author(s):  
Joonsuk Kim ◽  
Jiunn-Tsair Chen ◽  
J.M. Cioffi
Keyword(s):  
Fading Channels ◽  
Communication Systems ◽  
Low Complexity ◽  
Mapping Algorithm ◽  
Bit Mapping ◽  
Carrier Communication

scholarly journals Partial PIC-MRC Receiver Design for Single Carrier Block Transmission System over Multipath Fading Channels

2012 ◽  
Vol 2012 ◽  
pp. 1-9
Author(s):  
Juinn-Horng Deng ◽  
Sheng-Yang Huang
Keyword(s):  
Fading Channels ◽  
Interference Cancellation ◽  
Fading Channel ◽  
Communication Systems ◽  
Average Power ◽  
Multipath Fading ◽  
Low Complexity ◽  
Multipath Fading Channel ◽  
Block Transmission ◽  
Single Carrier

Single carrier block transmission (SCBT) system has become one of the most popular modulation systems due to its low peak-to-average power ratio (PAPR), and it is gradually considered to be used for uplink wireless communication systems. In this paper, a low complexity partial parallel interference cancellation (PIC) with maximum ratio combining (MRC) technology is proposed to use for receiver to combat the intersymbol interference (ISI) problem over multipath fading channel. With the aid of MRC scheme, the proposed partial PIC technique can effectively perform the interference cancellation and acquire the benefit of time diversity gain. Finally, the proposed system can be extended to use for multiple antenna systems to provide excellent performance. Simulation results reveal that the proposed low complexity partial PIC-MRC SIMO system can provide robust performance and outperform the conventional PIC and the iterative frequency domain decision feedback equalizer (FD-DFE) systems over multipath fading channel environment.

scholarly journals Low-complexity beam-domain channel estimation and power allocation in hybrid architecture massive MIMO systems

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Xiao Chen ◽  
Zaichen Zhang ◽  
Liang Wu ◽  
Jian Dang
Keyword(s):  
Channel Estimation ◽  
Power Allocation ◽  
Spectral Efficiency ◽  
Communication Systems ◽  
Mimo Systems ◽  
Beam Steering ◽  
Estimation Method ◽  
Low Complexity ◽  
Estimation Accuracy ◽  
Hybrid Architecture

Abstract In this journal, we investigate the beam-domain channel estimation and power allocation in hybrid architecture massive multiple-input and multiple-output (MIMO) communication systems. First, we propose a low-complexity channel estimation method, which utilizes the beam steering vectors achieved from the direction-of-arrival (DOA) estimation and beam gains estimated by low-overhead pilots. Based on the estimated beam information, a purely analog precoding strategy is also designed. Then, the optimal power allocation among multiple beams is derived to maximize spectral efficiency. Finally, simulation results show that the proposed schemes can achieve high channel estimation accuracy and spectral efficiency.

Joint low-complexity equalization and CFO estimation and compensation for UWA-OFDM communication systems

2020 ◽  
Vol 33 (3) ◽  
pp. e3972 ◽  
Author(s):  
Khaled Ramadan ◽  
Khalil F. Ramadan ◽  
Ahmed S. Fiky ◽  
Hasna Alam ◽  
Moawad I. Dessouky ◽  
...  
Keyword(s):  
Communication Systems ◽  
Low Complexity

Performance study of multi-hop communication systems with decode-and-forward relays over α − μ fading channels

2017 ◽  
Vol 11 (10) ◽  
pp. 1641-1648 ◽  
Author(s):  
Tha'er F. Hailat ◽  
Haythem Bany Salameh ◽  
Taimour Aldalgamouni
Keyword(s):  
Fading Channels ◽  
Communication Systems ◽  
Performance Study ◽  
Decode And Forward

scholarly journals Modeling of Non-WSSUS Double-Rayleigh Fading Channels for Vehicular Communications

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Carlos A. Gutiérrez ◽  
J. J. Jaime-Rodríguez ◽  
J. M. Luna-Rivera ◽  
Daniel U. Campos-Delgado ◽  
Javier Vázquez Castillo
Keyword(s):  
Fading Channels ◽  
Communication Systems ◽  
Rayleigh Fading ◽  
Channel Model ◽  
Closed Form Solution ◽  
Multipath Fading ◽  
Rayleigh Distribution ◽  
Rayleigh Fading Channels ◽  
Small Scale ◽  
Time Frequency

This paper deals with the modeling of nonstationary time-frequency (TF) dispersive multipath fading channels for vehicle-to-vehicle (V2V) communication systems. As a main contribution, the paper presents a novel geometry-based statistical channel model that facilitates the analysis of the nonstationarities of V2V fading channels arising at a small-scale level due to the time-varying nature of the propagation delays. This new geometrical channel model has been formulated following the principles of plane wave propagation (PWP) and assuming that the transmitted signal reaches the receiver antenna through double interactions with multiple interfering objects (IOs) randomly located in the propagation area. As a consequence of such interactions, the first-order statistics of the channel model’s envelope are shown to follow a worse-than-Rayleigh distribution; specifically, they follow a double-Rayleigh distribution. General expressions are derived for the envelope and phase distributions, four-dimensional (4D) TF correlation function (TF-CF), and TF-dependent delay and Doppler profiles of the proposed channel model. Such expressions are valid regardless of the underlying geometry of the propagation area. Furthermore, a closed-form solution of the 4D TF-CF is presented for the particular case of the geometrical two-ring scattering model. The obtained results provide new theoretical insights into the correlation and spectral properties of small-scale nonstationary V2V double-Rayleigh fading channels.

A Novel Low-Complexity Adaptive Bit Mapping Scheme for Spatial Modulation

2018 ◽  
Vol 67 (4) ◽  
pp. 3674-3678 ◽  
Author(s):  
Husam Elfadil ◽  
Mehdi Maleki ◽  
Hamid Reza Bahrami
Keyword(s):  
Low Complexity ◽  
Spatial Modulation ◽  
Bit Mapping ◽  
Mapping Scheme
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