Characteristics and modelling of inter-cell interference for orthogonal frequency-division multiple access systems in multipath Rayleigh fading channels

2012 ◽  
Vol 6 (17) ◽  
pp. 3015-3025 ◽  
Author(s):  
J.-S. Sheu ◽  
W.-H. Sheen
Keyword(s):  
Fading Channels ◽  
Multiple Access ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channels ◽  
Frequency Division ◽  
Inter Cell Interference

scholarly journals Review of Channel Estimation for Candidate Waveforms of Next Generation Networks

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 956 ◽  
Author(s):  
Owoicho E. Ijiga ◽  
Olayinka O. Ogundile ◽  
Ayokunle D. Familua ◽  
Daniel J. J. Versfeld
Keyword(s):  
Fading Channels ◽  
Amplitude Modulation ◽  
Filter Bank ◽  
Rayleigh Fading ◽  
Perfect Reconstruction ◽  
Rayleigh Fading Channels ◽  
Next Generation Networks ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
5G Networks

The advancement in wireless communication applications encourages the use of effective and efficient channel estimation (CE) techniques because of the varying behaviour of the Rayleigh fading channel. In most cases, the emphasis of most proposed CE schemes is to improve the CE performance and complexity for ensuring quality signal reception and improved system throughput. Candidate waveforms whose designs are based on filter bank multi-carrier (FBMC) modulation techniques such as filter bank orthogonal frequency division multiplexing based on offset quadrature amplitude modulation (OFDM-OQAM), universal filtered multicarrier (UFMC) and generalised frequency division multiplexing based on offset quadrature amplitude modulation (GFDM-OQAM) are no exception to the use of these proposed CE techniques in the literature. These schemes are considered as potential waveform candidates for the physical/media access control layer of the emerging fifth generation (5G) networks. Therefore, pinpoint CE techniques represent an important requirement for these waveforms to attain their full potentials. In this regard, this paper reviews the concept of CE as applicable to these waveforms as well as other waveform candidates under consideration in the emerging 5G networks. Since the design of the majority of the waveform candidates is filter based, a review of the general filter design considerations is presented in this paper. Secondly, we review general CE techniques for candidate waveforms of next generation networks and classify some of the studied CE techniques. In particular, we classify the CE schemes used in filter bank OFDM-OQAM and GFDM-OQAM based transceivers and present a performance comparison of some of these CE schemes. Besides, the paper reviews the performances of two linear CE schemes and three adaptive based CE schemes for two FBMC based waveform candidates assuming near perfect reconstruction (NPR) and non-perfect reconstruction (Non-PR) filter designs over slow and fast frequency selective Rayleigh fading channels. The results obtained are documented through computer simulations, where the performances of the studied CE schemes in terms of the normalised mean square error (NMSE) are analysed. Lastly, we summarise the findings of this work and suggest possible research directions in order to improve the potentials of the studied candidate waveforms over Rayleigh fading channels.

scholarly journals Performance Enhanced Coded OFDM with Almost Linear Inter leaver over Rayleigh Fading Channels

2021 ◽  
Author(s):  
chenggao han
Keyword(s):  
Fading Channels ◽  
Orthogonal Frequency Division Multiplexing ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channels ◽  
Frequency Division ◽  
Industry Standards ◽  
Comprehensive Performance ◽  
Union Bound ◽  
Simulation Results ◽  
Coded Ofdm

This paper presents a comprehensive performance analysis of coded orthogonal frequency division multiplexing (COFDM) over the quasi-static multipath Rayleigh fading channels. We first analyze the pairwise error probability (PEP) of COFDM and then consider the union bound on bit error rate (BER) by introducing the notion of diversity guard (DG) and a novel interleaver class, named almost linear interleaver (ALI). A construction of ALI is also introduced with its parameter selection. Simulation results show that the COFDM with ALI outperforms that with random interleaver (RI) and the block interleaver (BI) adopted in the IEEE industry standards.<br><br>

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