On the Application of Raised-Cosine Wavelets for Multicarrier Systems Design

Anoh, Kelvin; Mapoka, Trust T.; Abd‐Alhameed, Raed A.; Ochonogor, O.; Jones, Steve

doi:10.15866/irecap.v4i4.2455

Cited by 5 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [7], it was shown that wavelets have better suppressed sidelobes than conventional FFT-OFDM systems. That study did not explore other well-known wavelets, such as the orthogonal wavelets described in the literature [12], [14], [17], [20]. In the following, we demonstrate the filter response of these wavelets showing the performance of the sidelobes in Figs.…”

Section: Sidelobe Performance Of Different Mother Waveletsmentioning

confidence: 99%

“…Wavelets from the orthogonal family have distortionless sidelobes [12]- [14]. We evaluate the performances of different wavelets in terms of the side-lobe performances which has the potential to influence the energy of the adjacent subbands.…”

Section: Sidelobe Performance Of Different Mother Waveletsmentioning

confidence: 99%

“…In this study, we adopt the use of pilots, which are widely known to enhance channel estimation and reduce bit error probability, to also reduce the PAPR as in [11], [28], [29] for 29 different orthogonal wavelets. Wavelets are alternative multicarrier modulation kernels used in the design of OFDM-like multicarrier systems that exist in different forms [10], [13], [15], [17]. It has the property of resolving frequencies in blocks of time of interest just like the short-time Fourier transform.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

PAPR reduction of wavelet-OFDM systems using pilot symbols

Anoh

Ikpehai

Rabie

et al. 2018

2018 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC)

View full text Add to dashboard Cite

Wavelet transform is at the heart of IEEE 1901 power line communication standard which uses orthogonal frequency-division multiplexing (OFDM) scheme. Examples of wavelets used in designing wavelet-based OFDM (WOFDM) have been shown as possessing lower peak-to-average power ratio (PAPR) than the conventional fast Fourier transform (FFT)-based OFDM. In this study, we investigate 29 different orthogonal wavelets that can be used in designing WOFDM in terms of PAPR and sidelobes behaviour of the filters that enable these wavelets. Our WOFDM model shows that most orthogonal wavelets with increasing filter coefficient lengths achieve better PAPR. In addition, we also demonstrate a method of pilot-assisted OFDM (PA-OFDM) processing to further reduce the PAPR of the WOFDM systems. This technique achieves PAPR reduction with no added complexity and no extra bandwidth cost.

show abstract

Section: Sidelobe Performance Of Different Mother Waveletsmentioning

confidence: 99%

Section: Sidelobe Performance Of Different Mother Waveletsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PAPR reduction of wavelet-OFDM systems using pilot symbols

Anoh

Ikpehai

Rabie

et al. 2018

2018 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC)

View full text Add to dashboard Cite

show abstract

“…The alternative kernel uses the DFT tool except that there exists dilation (stretching) and translation (repositioning) of the signal coefficients. Since WT finds applications in communication systems design, WT-OFDM has been studied by different authors for wireless [13]- [16] and PLC [17], [18] systems. A major drawback in its adoption is that it is computationally inefficient and recent studies have led to different computationally efficient algorithms such as the ones reported in [9] and [19].…”

Section: A Ofdm Systems Design Using Wtmentioning

confidence: 99%

OFDM Systems Design Using Harmonic Wavelets

Anoh

Ikpehai

Adebisi

et al. 2019

2019 IEEE Wireless Communications and Networking Conference (WCNC)

View full text Add to dashboard Cite

Orthogonal frequency-division multiplexing (OFDM) is a popular multi-carrier technique used in many digital communication systems such as wireless fidelity (Wi-Fi), long term evolution (LTE) and power line communication systems. It can be designed using fast Fourier transform (FFT) or wavelet transform (WT). The major drawback in using WT is that it is computationally inefficient. In this study, we introduce a simple and computationally efficient WT, harmonic wavelet transform, for OFDM signal processing. The new WT uses the orthogonal basis functions of conventional FFT-OFDM except that it involves translation and dilation of the input signal; the new wavelets is referred to as harmonic wavelets (HW). When compared with pilot-assisted OFDM system in terms of reduction in the peak-to-average power ratio, the results show that HW-OFDM outperforms FFT-OFDM by 3 dB at 10 −4 CCDF (complementary cumulative distribution function). Over Rayleigh fading channel with additive white Gaussian noise (AWGN), the bit error ratio of both FFT-OFDM and HW-OFDM perfectly matched, showing that the proposed HW-OFDM is better in terms of peak-to-average power ratio reduction.

show abstract