Compromise between spectral efficiency and interference cancellation in OFDM system

Sofi, Naima; Tarek, Bendimerad Fethi; Debbat, Fatima

doi:10.1109/icemis.2017.8273009

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The price of these approximations is a loss in performance in terms of BER compared to the ML equalizer since there is a probability of eliminating the optimal estimation sequence in the early stages of the search. In conventional OFDM systems, a technique used to counteract ICI is deliberately sacrificing the spectral efficiency of the system, which is achieved by increasing redundancy in the transmitted data in forward error correction (FEC) stages [ 17 , 18 , 19 ], or using virtual carriers (VC), also known as guard symbols [ 20 , 21 , 22 , 23 , 24 ]. Several works [ 13 , 20 , 22 ] highlight the advantages of using VC during transmission, achieving an improvement in system performance in terms of BER and reducing the complexity required by linear/nonlinear detectors.…”

Section: Introductionmentioning

confidence: 99%

“…In conventional OFDM systems, a technique used to counteract ICI is deliberately sacrificing the spectral efficiency of the system, which is achieved by increasing redundancy in the transmitted data in forward error correction (FEC) stages [ 17 , 18 , 19 ], or using virtual carriers (VC), also known as guard symbols [ 20 , 21 , 22 , 23 , 24 ]. Several works [ 13 , 20 , 22 ] highlight the advantages of using VC during transmission, achieving an improvement in system performance in terms of BER and reducing the complexity required by linear/nonlinear detectors. However, the receivers reported in state-of-the-art detectors do not use the diversity of the received signal during the detection process.…”

Section: Introductionmentioning

confidence: 99%

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Maximal Ratio Combining Detection in OFDM Systems with Virtual Carriers Over V2V Channels

Puerto-Flores

Castillo-Soria

Castillo

et al. 2023

Sensors

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This paper examines the performance of orthogonal frequency division multiplexing (OFDM) systems for vehicle-to-vehicle (V2V) communication channels. More specifically, a doubly selective channel under high intercarrier interference (ICI) is considered. Current solutions involve complex detection and/or reduced spectral efficiency receivers. This paper proposes the use of virtual carriers (VC) in an OFDM system with a low-complexity maximal ratio combining (MRC) detector to improve the bit error rate (BER) performance. The results show that VC provides diversity in received data, resulting in a ≥5 dB gain compared to previous OFDM systems with conventional linear/nonlinear detectors used as a reference. The detector presented in this paper has linear complexity, making it a suitable solution for real-time V2V communication systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maximal Ratio Combining Detection in OFDM Systems with Virtual Carriers Over V2V Channels

Puerto-Flores

Castillo-Soria

Castillo

et al. 2023

Sensors

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“…Many multiplexing methods are used to reduce the number of transmission channels. There are analogue and digital multiplexing methods such as Frequency-division multiplexing (FDM), Wavelength-division multiplexing (WDM), Time-division multiplexing (TDM), Code-division multiplexing (CDM) (Wu, 2010;Feng et al, 2010;Han et al, 2013;Sofi et al, 2017). FDM, one of the analogue multiplexing methods, is based on the principle that the signals to be carried in a transmission channel are placed and transported on the frequency band in accordance with the guard bands (Wu, 2010).…”

Section: Introductionmentioning

confidence: 99%

Transmitting the Chaotic Masked Audio Signal from a Single Channel

ÇABUKER

Almalı

PARLAR

2023

Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Data security is very crucial for communication systems. Encryption methods are frequently used to ensure the security. Chaotic oscillators are used for encryption of data because they produce signals that do not repeat themselves. Identical chaotic oscillators should be used and synchronized with each other in order to perform encryption and decryption processes in a healthy way. In this study, the encrypted data and synchronization signal are transmitted to the receiver side using frequency division multiplexing (FDM) method to realize the synchronization between two chaotic oscillators. High-frequency keying is used to increase the encryption quality of the signal to be encrypted on the transmitter side. Proportional-Integral-Derivative (PID) control is used to provide synchronization between two chaotic oscillators. Correlation test, peak signal to noise ratio (PSNR), mean square error (MSE) and spectral entropy were used to determine the accuracy relationship between the original signal and the decryption signal. As a result, the encryption success and reliability of the created system were verified by simulation programs and numerical analysis.

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The impact of out of band emissions: A measurement based performance comparison of UF-OFDM and CP-OFDM

Goztepe

Kurt

2019

Physical Communication

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Compromise between spectral efficiency and interference cancellation in OFDM system

Cited by 5 publications

References 3 publications

Maximal Ratio Combining Detection in OFDM Systems with Virtual Carriers Over V2V Channels

Maximal Ratio Combining Detection in OFDM Systems with Virtual Carriers Over V2V Channels

Transmitting the Chaotic Masked Audio Signal from a Single Channel

The impact of out of band emissions: A measurement based performance comparison of UF-OFDM and CP-OFDM

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