Hybrid Combination of N-Continuous and Null-Space Precoding for Out-of-Band Emission Suppression

You, Zihao; Fang, Juan; Lu, I‐Tai

doi:10.1109/milcom.2013.266

Cited by 2 publications

(12 citation statements)

References 12 publications

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“…The hybrid B 1 curve in Figure 7 still has the small transition while providing better OOBE suppression just like the case without CP in Figure 6. It is shown in [22] that this combined scheme gives no extra degradation in the system performances such as the increase of BER or PAPR compared to either N-continuous symbol mapping or SVD precoding by the usage of a small maximum derivative order and the iterative decoder at the receiver. In conclusion, the proposed hybrid B scheme is well suitable for the CP-OFDM scenario.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…δ N l needs to be correctly estimated so that it can be removed fromĉ l to recover d l . However, from (22) we know that δ N l depends on d l . Therefore, an iterative decoder is needed.…”

Section: Combination Of Svd Precodingmentioning

confidence: 99%

“…If it is not the last iteration, then d [22] that the convergence is always achieved after just three iterations for an additive white Gaussian noise (AWGN) channel. However, the magnitude of the perturbation vector increases as J increases, thus causing the degradation in BER.…”

Section: Combination Of Svd Precodingmentioning

confidence: 99%

“…So, the complexity for either of the SVD, spectral, or hybrid A scheme is F log 2 F − 3F + 4 + 4NK. Next, for the N-continuous and hybrid B schemes, the dimensions of (AΦ) + A and (AΦ) + AΦ in (22) are both N × N, and the dimensions of (AΦG) (28) are N × N and N × K, respectively. So, the complexity for the Ncontinuous scheme is F log 2 F − 3 F + 4 + 8NN, which is much larger than the precoding schemes.…”

Section: Computational Complexity Analysismentioning

confidence: 99%

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Out-of-band emission suppression techniques based on a generalized OFDM framework

You

Fang

2014

EURASIP J. Adv. Signal Process.

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Orthogonal frequency division multiplexing (OFDM)-based cognitive radio (CR) systems suffer from the large out-of-band emission (OOBE) that may interfere with other users. Since most existing OFDM OOBE suppression schemes are derived on the base of an original OFDM system without any other scheme, we first propose a generalized OFDM framework that is capable of describing these schemes no matter whether any one or more of the schemes is applied. Then, according to the place where these schemes are implemented in our framework, they are classified into three groups, namely symbol mapping techniques, precoding techniques, and time-domain techniques. Finally, based on the proposed framework, we propose three new schemes by combining a precoding scheme named singular value decomposition (SVD) precoding with three other schemes from the three groups, namely spectral precoding, N-continuous symbol mapping, and filtering. Numerical results show the power spectral density (PSD), peak-to-average power ratio (PAPR), and bit error rate (BER) performances of the three proposed schemes. Since the individual schemes have complementary characteristics, the three proposed combined schemes are constructed to maintain the merits and avoid the drawbacks of the individual schemes involved. Thus, it is demonstrated that the proposed framework can be employed to develop other new combined OOBE suppression schemes tailoring to some specific practical needs.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Combination Of Svd Precodingmentioning

confidence: 99%

Section: Combination Of Svd Precodingmentioning

confidence: 99%

Section: Computational Complexity Analysismentioning

confidence: 99%

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Out-of-band emission suppression techniques based on a generalized OFDM framework

You

Fang

2014

EURASIP J. Adv. Signal Process.

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“…Many OOBE suppression techniques have been studied, e.g. in [1–17]. Some schemes focus on the time‐domain symbols after the Fourier transform, e.g.…”

Section: Introductionmentioning

confidence: 99%

High‐performing orthogonal frequency division multiplexing precoding scheme for OOBE suppression

You¹,

Lu²,

Li³

2016

IET Communications

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Hybrid Combination of N-Continuous and Null-Space Precoding for Out-of-Band Emission Suppression

Cited by 2 publications

References 12 publications

Out-of-band emission suppression techniques based on a generalized OFDM framework

Out-of-band emission suppression techniques based on a generalized OFDM framework

High‐performing orthogonal frequency division multiplexing precoding scheme for OOBE suppression

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