Performance enhancement of SC-FDMA systems using a companding technique

El‐Samie, Fathi E. Abd; Al-Kamali, Faisal S.; Dessouky, Moawad I.; Sallam, Bassiouny M.; Shawki, F.

doi:10.1007/s12243-009-0154-6

Cited by 30 publications

(5 citation statements)

References 14 publications

(31 reference statements)

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“…( where y m is the original signal, t m is the companded signal, and h( ⋅ ) is the companding function. The exponential companding function [17] is given by.…”

Section: Time-domain Symbolsmentioning

confidence: 99%

“…One of the most extensively used techniques to limit PAPR is μ-law companding [16]. The μ-law [17] and the new error function [18] companding techniques have been used to mitigate PAPR in SC-FDMA systems, but they increase the average power of the companded signal. In [19], authors proposed a companding technique to reduce the PAPR of the SC-FDMA signal by approximating its distribution without significant degradation in the BER performance.…”

Section: Introductionmentioning

confidence: 99%

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Walsh‐Hadamard‐transform‐based SC‐FDMA system using WARP hardware

Kondamuri

Anuradha

2021

ETRI Journal

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Single-carrier frequency division multiple access (SC-FDMA) is currently being used in long-term evolution uplink communications owing to its low peak-to-average power ratio (PAPR). This study proposes a new transceiver design for an SC-FDMA system based on Walsh-Hadamard transform (WHT). The proposed WHT-based SC-FDMA system has low-PAPR and better bit-error rate (BER) performance compared with the conventional SC-FDMA system. The WHT-based SC-FDMA transmitter has the same complexity as that of discrete Fourier transform (DFT)-based transmitter, while the receiver's complexity is higher than that of the DFT-based receiver. The exponential companding technique is used to reduce its PAPR without degrading its BER. Moreover, the performances of different ordered WHT systems have been studied in additive white Gaussian noise and multipath fading environments. The proposed system has been verified experimentally by considering a real-time channel with the help of wireless open-access research platform hardware. The supremacy of the proposed transceiver is demonstrated based on simulated and experimental results.

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“…( where y m is the original signal, t m is the companded signal, and h( ⋅ ) is the companding function. The exponential companding function [17] is given by.…”

Section: Time-domain Symbolsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Walsh‐Hadamard‐transform‐based SC‐FDMA system using WARP hardware

Kondamuri

Anuradha

2021

ETRI Journal

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“…The 4G communication system is based on the OFDM technique with a high transmission speed of 100Mbps. Although the implementation complexity and cost of this technique are quite high, which leads to the new technique named Long Term Evolution (LTE) based on OFDM and SC-FDM [7]. At present, researchers are further looking forward to 5G technology with a speed of 1 Gbps to 10 Gbps.…”

Section: Introductionmentioning

confidence: 99%

Effect of block size on BER performance of inverse filtering based MIMO FBMC

Srivastava

Shukla

Singh³

2023

Wireless Netw

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Filter bank multicarrier (FBMC) is a novel next generation data transfer technique.FBMC has large number of benefits over conventional OFDM techniques. The FBMC scheme suffers from imaginary interference thus degrades the bit error rate (BER) performance at the receiver. In recent past ICI free Alamouti-coded FBMC, frame and block repetition schemes for BER improvement are discussed. However, in the analysis various interfering terms are neglected. In this work to reduce inter carrier interference (ICI) and inter symbol interference (ISI) concept of inverse filtering is applied without neglecting other interfering terms and mathematical equations are derived and BER is evaluated. The simulation results are presented and compared with state of art technologies and it has been found that the proposed scheme is better in comparison to to state of art technologies.

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“…Non‐linear companding transform, another effective approach to reduce PAPR, offers a favourable bit error rate (BER) performance with low implementation complexity [8]. Incorporation of a non‐linear companding process in SCFDMA system, namely u‐law companding, has been studied jointly with pulse shaping filters in [9], which shows better PAPR reduction while offering a slight improvement in BER.…”

Section: Introductionmentioning

confidence: 99%