Symbol error rate of QO‐STBC based decode‐and‐forward cooperative communication system over generalised – and – fading channels

This study presents a simple technique, which is used to estimate both channel state and carrier frequency offset (CFO) in decode-and-forward relay systems, where coded orthogonal frequency division multiplexing is employed without cyclic prefix. On the basis of the least-square criterion, we derive the estimate of CFO and channel with the aids of consecutive blocks of pilot symbols. The initially proposed estimation technique achieves a distinguished performance by using a two-dimensional complete search approach; however, the computation becomes more and more intensive when the search granularity becomes finer and finer. For this reason, we further present an iterative approach as an alternative solution, which provides a performance comparable with that of the complete search method, while greatly reducing the implementation complexity. Besides, we also derive a closed-form expression of the CFO estimate for the considered system, which allows us to avoid the exhaustive search during the estimation processing. Computer simulations have been conducted to verify the efficiency of the proposed schemes.

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CFO/Channel estimation algorithms for space‐time block coded orthogonal frequency division multiplexing wireless relay networks without using cyclic prefix of OFDM

Lin

Hwang

2019

IET signal process.

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Low complexity maximum likelihood decoding for orthogonal space-time block codes using non-square and rotated quadrature amplitude modulation

Surendar¹

2020

International Journal of Electronics

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Evaluating the Mobility Impact on the Performance of Heterogeneous Wireless Networks Over η – μ Fading Channels

Meesa-ard

Pattaramalai

2021

IEEE Access

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The 5G and beyond networks will intrinsically accommodate a wide range of use-case scenarios and expand the limit of legacy mobile systems. The 5G network architecture can handle the seamless operation of various wireless channels in a heterogeneous environment. The η-µ fading model is well-suited for versatile channels as it adapts to different fading behaviors in a broad-range propagation for non-line-of-sight (NLOS) circumstances. This paper evaluates the performance of heterogeneous wireless networks using η-µ fading channel under mobility conditions. We incorporated the random waypoint (RWP) model with η-µ distribution to model the dynamic behavior of non-homogeneous fading. The derivation of expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the received signal power for a mobile network in all three-dimensional topologies is extracted. Consequently, the outage probability (OP) and average bit error rate (ABER) are analyzed to quantify the performance of the mobile system. The effect of co-channel interference (CCI) is investigated based on a desired and interfering signal transmitted in mobile networks. The proposed novel-form can characterize the performance of a mobile user, and the derivation is useful for measuring the effect of noise and interference on the signal. Finally, the novel-form applicability analyzes the impact of mobility incorporated in different fading channels such as Nakagami-m, Nakagami-q (Hoyt), Rayleigh, and one-sided Gaussian distributions.INDEX TERMS Co-channel interference, η-µ distribution, generalized fading model, heterogeneous network, random waypoint mobility.

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Symbol error rate of QO‐STBC based decode‐and‐forward cooperative communication system over generalised – and – fading channels

Cited by 3 publications

References 47 publications

CFO/Channel estimation algorithms for space‐time block coded orthogonal frequency division multiplexing wireless relay networks without using cyclic prefix of OFDM

CFO/Channel estimation algorithms for space‐time block coded orthogonal frequency division multiplexing wireless relay networks without using cyclic prefix of OFDM

Low complexity maximum likelihood decoding for orthogonal space-time block codes using non-square and rotated quadrature amplitude modulation

Evaluating the Mobility Impact on the Performance of Heterogeneous Wireless Networks Over η – μ Fading Channels

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