Performance comparison of DWT OFDM and FFT OFDM in presence of CFO and Doppler effect

Hariprasad, N.; Sundari, G.

doi:10.1109/iccicct.2014.6993026

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…9 demonstrates that the BER performance with Rayleigh fading channel. There is not much changes in the performance of conventional DFT-OFDM [18] and DWT-OFDM [21] with the Rayleigh fading channel where as our proposed model got further mitigated performance of BER. Fig.…”

Section: Resultsmentioning

confidence: 79%

“…It was also found that the DMWT-OFDM design achieved much lower BER performance and can be utilized as an alternative to the conventional DFT-OFDM. Another advancement of DWT-OFDM system is presented in [21], which disclosed the performance of BER in presence of carrier frequency offset (CFO) and Doppler-effect. Fading channels with exponential power delay profile is considered in [22], which also provided the performance of W-OFDM and compared to that of DFT-OFDM.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome the drawbacks of DFT-OFDM with AWGN [], DWT-OFDM with AWGN [24], DFT-OFDM with Rayleigh fading [18] and DWT-OFDM with Rayleigh fading [21], our present work aims at performing the enhanced version of discrete wavelet i.e., translation invariant wavelet which is discussed in section problem outline. The rest of the paper is organized as follows: Section 2 provides a brief description of the problem outline.…”

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confidence: 99%

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BER Analysis of Translation Invariant Wavelet Based Orthogonal Frequency Division Multiplexing System for 5G Wireless Communication Networks

Sunkara¹,

Bhargava²

2018

IJIES

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A good orthogonality is provided by the wavelet-based orthogonality frequency division multiplexing (W-OFDM) and well reduction of bit error rate is gained with W-OFDM over conventional OFDM systems. Most importantly, it provides enhanced spectral efficiency since it does not require cyclic prefix (CP) which leads to the achievement of ultra-high data rates. Hence, this can be used in 5 th generation (5G) wireless communication networks. It is proposed to use the discrete wavelet transform (DWT) based OFDM in place of conventional discrete fourier transform (DFT) based OFDM in the applications of long term evaluation (LTE). However, discrete wavelet transforms (DWT) based OFDM system suffers from the down sampling, which mitigates the actual size of input bit streams and there by degradation in the system efficiency. To resolve this issue, and for enhancing further mitigation in bit error rate (BER) performance, a novel W-OFDM is proposed. Our proposed W-OFDM system utilizes translation invariant wavelet transform (TIWT) in place of DWT for enhanced spectral efficiency. In addition, fading channel environment is considered to disclose the effectiveness of proposed TIWT-OFDM system. Extensive experimental results show that the BER performance of proposed TIWT-OFDM is superior to the existing OFDM systems like DFT-OFDM and DWT-OFDM systems.

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Section: Resultsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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BER Analysis of Translation Invariant Wavelet Based Orthogonal Frequency Division Multiplexing System for 5G Wireless Communication Networks

Sunkara¹,

Bhargava²

2018

IJIES

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“…A signal carrying meteorological information [9] is sent by the transmitter on a floating node. All the space the signal travels before reaching the receiver is called a channel [10] . A significant relative motion exists between the signal transmitter and receiver, and the signal will be affected by the Doppler effect when transmitted in the channel [11] .…”

Section: Introductionmentioning

confidence: 99%

Motion Model of Floating Weather Sensing Node for Typhoon Detection

Dong

Cao

2022

Complex Syst. Model. Simul.

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To improve the accuracy of typhoon prediction, it is necessary to detect the internal structure of a typhoon. The motion model of a floating weather sensing node becomes the key to affect the channel frequency expansion performance and communication quality. This study proposes a floating weather sensing node motion modeling method based on the chaotic mapping. After the chaotic attractor is obtained by simulation, the position trajectory of the floating weather sensing node is obtained by space and coordinate conversion, and the three-dimensional velocity of each point on the position trajectory is obtained by multidimensional linear interpolation. On this basis, the established motion model is used to study the Doppler frequency shift, which is based on the software and physical platform. The software simulates the relative motion of the transceiver and calculates the Doppler frequency shift. The physical platform can add the Doppler frequency shift to the actual transmitted signal. The results show that this method can effectively reflect the influence of the floating weather sensing node motion on signal transmission. It is helpful to research the characteristics of the communication link and the design of a signal transceiver for typhoon detection to further improve the communication quality and to obtain more accurate interior structure characteristic data of a typhoon.

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“…In this paper, we propose a discrete wavelet multitone (DWMT) modulation scheme for PON, which provides all the advantages known in OFDM-PON and also provides some excellent features such as low side lobes, low PAPR, and improved spectrum efficiency due to the removal of cyclic prefix (CP). The DWMT modulation has been standardized in IEEE 1901 for power line communication [7], and also been widely investigated as a good candidate for digital subscriber loop (DSL) [8], wireless communications [9][10][11], optical communications [12]. To the best of our knowledge, this is the first work investigate the DMWT modulation as a promising solution for next generation PON.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of PAM-DWMT for passive optical network

Lin

Zhang

Tang

et al. 2018

Optics Communications

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We experimentally demonstrate a discrete wavelet multitone (DWMT) modulation scheme based on pulse amplitude modulation (PAM) for next generation passive optical network (PON), which offers high tolerance against chromatic dispersion, high spectral efficiency, low peak to average power ratio (PAPR) and low side lobes. The experimental results show the chromatic dispersion induced power penalties are negligible after 20km fiber transmission. Compared with orthogonal frequency division multiplexing (OFDM), DWMT offers a better receiver sensitivity.

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Performance comparison of DWT OFDM and FFT OFDM in presence of CFO and Doppler effect

Cited by 8 publications

References 4 publications

BER Analysis of Translation Invariant Wavelet Based Orthogonal Frequency Division Multiplexing System for 5G Wireless Communication Networks

BER Analysis of Translation Invariant Wavelet Based Orthogonal Frequency Division Multiplexing System for 5G Wireless Communication Networks

Motion Model of Floating Weather Sensing Node for Typhoon Detection

Experimental demonstration of PAM-DWMT for passive optical network

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