Analysis of cyclic prefix length effect on ISI limitation in OFDM system over a Rayleigh-fading multipath

Zanafi, Sarah; Aknin, Noura

doi:10.11591/ijece.v11i4.pp3114-3122

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…A method for preventing channel fading called STBC comprises generating codes at the transmitter and encoding them somewhere at the receiving end. In today's communication world, all aspects of wireless transmission are moving at a faster rate, with the high carrier frequency transition and channel moving even faster [7], [8]. CSI estimation in a time-varying channel has become a challenging task.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of bit error rate in 2×2 and 4×4 multi-input multi-output-orthogonal frequency division multiplexing systems

Kumar

Prasanna²,

Alagarsamy³

et al. 2023

IJECE

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Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems with multiple input antennas and multiple output antennas in dynamic environments face the challenge of channel estimation. To overcome this challenge and to improve the performance and signal-to-noise ratio, in this paper we used the Kalman filter for the correct estimation of the signal in dynamic environments. To obtain the original signal at the receiver end bit error rate factor plays a major role. If the signal to noise ratio is high and the bit error rate is low then signal strength is high, the signal received at the receiver end is almost similar to the ith transmitted signal. The dynamic tracking characteristic of Kalman filter is used to establish a dynamic space-time codeword and a collection of orthogonal pilot sequences to prevent interference among transmissions in this paper. Using the simulation, the Kalman filter method can be compared to the other channel estimation method presented in this paper that can track time-varying channels rapidly.

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Section: Introductionmentioning

confidence: 99%

“…The simulation advantages of this technique have erroneous limits when the noise ratio is sufficient. The EKF is used to calculate the temporal correlation coefficients and CIR [8] as they change over time. Rauch-Tung-Striebelsmoother (RTSS) could be used to smooth out EKF calculations, improving channel estimation accuracy.…”

Section: Introductionmentioning

confidence: 99%

Estimation of bit error rate in 2×2 and 4×4 multi-input multi-output-orthogonal frequency division multiplexing systems

Kumar

Prasanna²,

Alagarsamy³

et al. 2023

IJECE

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“…Fourati et al [26] considers modern concepts for self-organizing cellular networks applied to 5G. Evaluation of the impact of ISI on the quality of OFDM signal processing is considered in [27]. Promising antenna systems for 5G are considered in Mattera and Tanda [28], the problems of network optimization and coding in them are studied in the articles [29], [30].…”

Section: Introductionmentioning

confidence: 99%

Implementation and analysis of 5G network identification operations at low signal-to-noise ratio

et al. 2023

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The article investigates the operations of identifying a cellular network and searching for a cell at various signal-to-noise ratios. The estimation of frequency and time displacement, criteria for detecting the primary synchronization signal are presented. The main contribution of this article is the consideration of the step-by-step execution of the 5G cell search procedure in a complex interference environment. The decoding steps of the primary and secondary synchronization signals are being investigated. This is achieved by analyzing the signals at each step of the correlation algorithm for different signal-to-noise ratios. In order to verify the adequacy of the proposed models, a sequence operation for synchronizing 5G mobile networks with base station signals is considered. The dependence the magnitude of the error vector modulus on the signal-to-noise ratio of a physical broadcasting channel is investigated for three different channel profiles without line of sight. As a result of the experiment, the error vector of the physical broadcast channel changes from 55% to 10%, when the signal-to-noise ratio changes from 0 to 20 dB. In the multiple-input multipleoutput (MIMO) mode, we received a 3 dB increase in communication energy efficiency. The findings will be useful for 5G system designers to troubleshoot synchronization problems.

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“…In [13], it analyzes the bit error rate (BER) performance of discrete cosine transform (DCT)based OFDM and compares it to discrete fourier transform (DFT)-based OFDM to determine which modulation scheme performs better. In [14] The cyclic prefix's effect on the OFDM system's performance was investigated. The BER for different lengths of the cyclic prefix was compared using an OFDM transceiver equipped with a 16-QAM modulation method, highlighting the effect of channel noise.…”

Section: Introductionmentioning

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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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.

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Analysis of cyclic prefix length effect on ISI limitation in OFDM system over a Rayleigh-fading multipath

Cited by 3 publications

References 11 publications

Estimation of bit error rate in 2×2 and 4×4 multi-input multi-output-orthogonal frequency division multiplexing systems

Estimation of bit error rate in 2×2 and 4×4 multi-input multi-output-orthogonal frequency division multiplexing systems

Implementation and analysis of 5G network identification operations at low signal-to-noise ratio

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

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