BER Comparison of OFDM with M-QAM Modulation Scheme of AWGN and Rayleigh Fading Channels

Farzamnia, Ali; Hlaing, Ngu War; Mariappan, Muralindran; Haldar, Manas K.

doi:10.1109/icsgrc.2018.8657503

Cited by 24 publications

(8 citation statements)

References 3 publications

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“…Then, 𝑥 ̂ is transmitted through the fading channel [17]. This signal is combined with additive noise in the wireless channel, resulting in the obtained signal as shown in (2) [18]:…”

Section: Research Methods 21 System Modelmentioning

confidence: 99%

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Performance evaluation of 4-quadrature amplitude modulation over orthogonal frequency division multiplexing system in different fading channels scenarios

Mohammed

Al-Rubaye²

2022

IJECE

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<p>Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation (MCM) technique that divides the wide bandwidth into parallel narrow bands, each of which is modulated by orthogonal subcarriers. Currently, OFDM is a high-spectral efficiency modulation technique that is used in a variety of wired and wireless applications. The transmitted signal in a wireless communication channel spreads from transmitter to receiver through multiple reflective paths. This triggers multipath fading, which causes variations in the received signal's amplitude and phase. Slow/fast and frequency-selective/frequency-nonselective are the main types of multipath fading channels. Therefore, in this paper, we proposed new models for modeling multipath fading channels, such as the exponential fading channel and the Gamma fading channel. In addition, new bit-error-rate (BER) derivations have been derived. The performance of the OFDM system over proposed channel models has been evaluated using Monte-Carlo simulation and compared to the Rayleigh fading channel model. The obtained results via simulations show that the exponential fading channel at a rate parameter (λ=0.5) outperforms the Rayleigh fading channel by 6 dB for all values of Eb/No, while the Gamma fading channel at (α=2) outperforms the Rayleigh fading channel by 3 dB for all values of Eb/No.</p>

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“…Then, 𝑥 ̂ is transmitted through the fading channel [17]. This signal is combined with additive noise in the wireless channel, resulting in the obtained signal as shown in (2) [18]:…”

Section: Research Methods 21 System Modelmentioning

confidence: 99%

“…Moreover, 𝑓(ℎ 𝑖 )|𝜃 a conditional PDF of ℎ 𝑖 subjected to θ, can be written as (8): Then the complex received signal, y, processed using the CP removal and fast fourier transform (FFT) operation [18]. As a result, in the frequency domain, the complex signal can be represented as (9):…”

Section: Research Methods 21 System Modelmentioning

confidence: 99%

Performance evaluation of 4-quadrature amplitude modulation over orthogonal frequency division multiplexing system in different fading channels scenarios

Mohammed

Al-Rubaye²

2022

IJECE

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“…To mimic the random process that occurs naturally in the real environment, AWGN was put into consideration in this research. AWGN does not consider fading, frequency selectivity, interference, nonlinearity, and dispersion [6]. It demonstrates a simple mathematical model which comes handy when the underlying behavior of a system need to be observed before the other cases were considered.…”

Section: Additive White Gaussian Noise (Awgn) Channelmentioning

confidence: 99%

Performance Analysis of OFDM Channel Estimation Under IQ Imbalance

Hlaing

Farzamnia

Masmin

et al. 2021

Lecture Notes in Electrical Engineering

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This study was done in attempt to investigate the effect of In-Phaseand-Quadrature Imbalance (IQI) presence in Orthogonal Frequency Division Multiplexing system (OFDM). Although OFDM system is widely used in the communication system, it is prone and sensitive to non-idealities such as IQI. This issue causes serious performance degradation in the system. Channel estimation plays an important part in an OFDM system. Thus, this study will investigate the effect of IQI in OFDM system channel estimation. There are two types of channel estimation scheme used in this paper. They are the Least Square (LS) and Linear Minimum Mean Square Error (LMMSE). The outcome for this channel estimation scheme will be compared with their theoretical values based on the channel's Mean Square Error (MSE). To obtain the result, LS and LMMSE channel estimation was developed and simulated using MATLAB Simulink software. Then, the corresponding output was analyzed. From the analysis, the performance of these two-channel estimation schemes was affected after the addition of IQI. However, comparing both schemes, LMMSE has better performance compared to LS in terms of MSE.

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“…Farzamnia et al [5] Presents the Bit Error Rate (BER) performance analysis of Orthogonal Frequency Division Multiplexing (OFDM) systems using QAM (4,8,16 and 64-QAM) modulation techniques and comparisons are made on Rayleigh fading and AWGN channels. The simulation results show that the modulation scheme QPSK offers the best BER performance in the OFDM system compared to the modulation scheme M -QAM.…”

Section: Literature Reviewmentioning

confidence: 99%

Integrated Antenna for the Digital Audio Broadcasting and Digital Video Broadcasting by Orthogonal Frequency Division Multiplexing

Drakshayini¹,

Singh²

2019

IJITEE

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Digital Audio Broadcasting (DAB) system is one of the high -definition radio with the ability to provide high audio quality and data -based services for stationary and mobile receivers. Digital Video Broadcasting (DVB) is the popular broadcasting standards that enable handheld receivers to receive high definition digital television transmissions. Orthogonal Frequency Division Multiplexing (OFDM) system is a digital multicarrier modulation technique intend offers high spectral efficiency. The main aim set is to arrive as an efficient unified system for multipurpose wireless system that would cater to all existing standards. This paper presents the unified approach for designing an integrated antenna for DAB and DVB using OFDM system. In this paper DAB and DVB using OFDM system is designed individually and their performance is measured by Bit Error Rate (BER). Integrated antenna for DAB and DVB using OFDM system is designed and simulated radiation patterns are presented. The proposed unified approach produces the better BER performance and better gain as compared to individual standard design.

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BER Comparison of OFDM with M-QAM Modulation Scheme of AWGN and Rayleigh Fading Channels

Cited by 24 publications

References 3 publications

Performance evaluation of 4-quadrature amplitude modulation over orthogonal frequency division multiplexing system in different fading channels scenarios

Performance evaluation of 4-quadrature amplitude modulation over orthogonal frequency division multiplexing system in different fading channels scenarios

Performance Analysis of OFDM Channel Estimation Under IQ Imbalance

Integrated Antenna for the Digital Audio Broadcasting and Digital Video Broadcasting by Orthogonal Frequency Division Multiplexing

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