Some Statistical Properties of Multicarrier Signals and Related Measures

Behravan, Ali; Eriksson, Thomas

doi:10.1109/vetecs.2006.1683168

Cited by 22 publications

(21 citation statements)

References 18 publications

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“…VIP has been shown to be a much better measure of a multicarrier signal's sensitivity to nonlinear distortion than is PAPR [14]. Our results apply to zero excess bandwidth signals with contiguous spectra.…”

Section: Introductionmentioning

confidence: 71%

Linear Precoding of OFDMA Signals to Minimize Their Instantaneous Power Variance

Falconer

2010

2010 IEEE Wireless Communication and Networking Conference

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Is there an optimum linear block precoding for orthogonal frequency division multiple access (OFDMA) signals that significantly reduces their instantaneous power variance? We explore this question for linear block-precoded OFDMA signals with contiguous frequency mapping. We find that there is an optimum linear block precoding, but its advantage over DFT precoding (such as that used for the uplink signaling in the 3GPP-LTE standard) is rather small.

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Section: Introductionmentioning

confidence: 71%

Linear Precoding of OFDMA Signals to Minimize Their Instantaneous Power Variance

Falconer

2010

2010 IEEE Wireless Communication and Networking Conference

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“…However, we showed that the effect of a nonlinearity on an OFDM signal is not clearly related to its PAPR. In some recent contributions other measures of the envelope fluctuations of multicarrier signals, such as the cubic metric (CM) [11,12] and the variance of the instantaneous power (VP) [13], have been proposed. The motivation for CM relies on the fact that the major distortion is caused by the third-order intermodulation product while the motivation for VP metric is to reduce the envelope fluctuations.…”

Section: Discussionmentioning

confidence: 99%

“…In Ref. [13] it is shown that, except for large back-offs, CM and VP are more related to the amount of distortion introduced by a nonlinearity than PAPR. Moreover in Ref.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Performance Improvement Capabilities of PAPR-reducing Methods

Deumal

Behravan

Eriksson

et al. 2007

Wireless Pers Commun

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One of the major drawbacks of multicarrier modulation is the large envelope fluctuations which either require an inefficient use of high power amplifiers or decrease the system performance. Peak-to-average power ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost function used to evaluate and design multicarrier systems. Several PAPR-reducing techniques have been proposed with the aim to alleviate back-off specifications or increase the system performance. Besides the fact that these techniques have varying PAPR-reduction capabilities, power, bandwidth and complexity requirements, it is interesting to notice that the performance of a system employing these techniques has not been fully analyzed. In this paper we, first, develop a theoretical framework for both PAPR and the distortion introduced by a nonlinearity, and then simulate an OFDM system employing several well known PAPR-reducing techniques from the literature. By means of the theoretical analysis and the simulation results we will show the relation between PAPR and the performance of OFDM systems when a clipping device is present and we will evaluate the real performance improvement capabilities of the PAPR-reducing methods. The agreement between the theoretical and the simulation results demonstrate the validity of the analysis.

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“…Consequently, the proposed MM-CI-based optimization procedure can be summarized in Algorithm 1. To solve the problems (40) and (41), we adopt CVX, a package for specifying and solving convex programs [48]. The tolerant precision for the stopping criteria of the CI process and the MM process are denoted by ε CI > 0 and ε MM > 0, respectively.…”

Section: A Choices Of Osbep Upper Bound and Initial Point In (40)mentioning

confidence: 99%

Circularly Pulse-Shaped Precoding for OFDM: A New Waveform and Its Optimization Design for 5G New Radio

Huang

2018

IEEE Access

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A new circularly pulse-shaped (CPS) precoding orthogonal frequency division multiplexing (OFDM) waveform, or CPS-OFDM for short, is proposed in this paper. CPS-OFDM, characterized by user-specific precoder flexibility, possesses the advantages of both low out-of-subband emission (OSBE) and low peak-to-average power ratio (PAPR), which are two major desired physical layer signal properties for various scenarios in 5G New Radio (NR), including fragmented spectrum access, new types of user equipments (UEs), and communications at high carrier frequencies. As opposed to most of existing waveform candidates using windowing or filtering techniques, CPS-OFDM prevents block extension that causes extra interblock interference (IBI) and envelope fluctuation unfriendly to signal reception and power amplifier (PA) efficiency, respectively. An optimization problem of the prototype shaping vector built in the CPS precoder is formulated to minimize the variance of instantaneous power (VIP) with controllable OSBE power (OSBEP) and noise enhancement penalty (NEP). In order to solve the optimization problem involving a quartic objective function, the majorization-minimization (MM) algorithmic framework is exploited. By proving the convexity of the proposed problem, the globally optimal solution invariant of coming data is guaranteed to be attained via numbers of iterations. Simulation results demonstrate the advantages of the proposed scheme in terms of detection reliability and spectral efficiency for practical 5G cases such as asynchronous transmissions and mixed numerologies.Index Terms-5G, New Radio (NR), new waveform, OFDM, DFT-S-OFDM, circularly pulse-shaped (CPS) precoding, low outof-subband emission (OSBE), low peak-to-average power ratio (PAPR), variance of instantaneous power (VIP), majorizationminimization (MM), convex optimization, transceiver design.Y. Huang and B. Su are 3GPP standardization delegates

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Some Statistical Properties of Multicarrier Signals and Related Measures

Cited by 22 publications

References 18 publications

Linear Precoding of OFDMA Signals to Minimize Their Instantaneous Power Variance

Linear Precoding of OFDMA Signals to Minimize Their Instantaneous Power Variance

Evaluation of Performance Improvement Capabilities of PAPR-reducing Methods

Circularly Pulse-Shaped Precoding for OFDM: A New Waveform and Its Optimization Design for 5G New Radio

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