Optimal Precoding in Conjunction with Windowing for Reduction in OOB Power of OFDM Based CR Systems

Sharique, Mohd; Chaturvedi, Anoop

doi:10.1007/s11277-016-3487-2

Wireless Pers Commun

2016

DOI: 10.1007/s11277-016-3487-2

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Optimal Precoding in Conjunction with Windowing for Reduction in OOB Power of OFDM Based CR Systems

Mohd Sharique

Anoop Chaturvedi

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Spectral Precoding for Out-of-Band Power Reduction Under Condition Number Constraint in OFDM-Based Systems

Pan

Yuan

2016

Wireless Pers Commun

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Due to the flexibility in spectrum shaping, orthogonal frequency division multiplexing (OFDM) is a promising technique for dynamic spectrum access. However, the out-of-band (OOB) power radiation of OFDM introduces significant interference to the adjacent users. This problem is serious in cognitive radio (CR) networks, which enables the secondary system to access the instantaneous spectrum hole.Existing methods either do not effectively reduce the OOB power leakage or introduce significant biterror-rate (BER) performance deterioration in the receiver. In this paper, a joint spectral precoding (JSP) scheme is developed for OOB power reduction by the matrix operations of orthogonal projection and singular value decomposition (SVD). We also propose an algorithm to design the precoding matrix under receive performance constraint, which is converted to matrix condition number constraint in practice. This method well achieves the desirable spectrum envelope and receive performance by selecting zero-forcing frequencies. Simulation results show that the OOB power decreases significantly by the proposed scheme under condition number constraint.

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Spectral Precoding for Out-of-Band Power Reduction Under Condition Number Constraint in OFDM-Based Systems

Pan

Yuan

2016

Wireless Pers Commun

View full text Add to dashboard Cite

show abstract

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Optimal Precoding in Conjunction with Windowing for Reduction in OOB Power of OFDM Based CR Systems

Cited by 1 publication

References 17 publications

Spectral Precoding for Out-of-Band Power Reduction Under Condition Number Constraint in OFDM-Based Systems

Spectral Precoding for Out-of-Band Power Reduction Under Condition Number Constraint in OFDM-Based Systems

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