Detailed analysis of the impact of the distortion due to nonlinear amplifiers on BER performance

Kumar, R.; Taggart, David A.; Mathur, Ashok

doi:10.1109/aero.2009.4839407

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…The tag signal can be easily distorted when passing through a nonlinear amplifier, a non-ideal filter, or an ADC at the reader receiver. The effect of distortion caused by nonlinear amplifier was investigated in [12]. The amplitude distortion caused by the gain ripple of physically realizable filters was introduced in [13].…”

Section: Amplitude Distortionmentioning

confidence: 99%

“…) and for a datum "1" is given by s 3 (t) = 1, 0 t 2T, and s 4 (t) = −s 3 (t) (12) where T is the pulse duration of the original symbol defined in (1). In the presence of frequency deviation σ(t)T described in the last section, we model the symbol waveform (datum "0" for example) of s 1 (t) which includes frequency deviation in a digital form as…”

Section: Symbol Detectormentioning

confidence: 99%

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Robust digital receiver for EPC sensor network

Cheng

Cho

2013

J. of Syst. Eng. Electron.

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A robust digital receiver based on a matched filter (MF) is proposed for the radio frequency identification (RFID) reader system to enhance the reliability of signal processing in the electronic product code (EPC) sensor network (ESN). The performance of the proposed receiver is investigated by examining the anti-collision algorithm in the EPC global Class1 Generation2 protocol. The validity and usefulness are demonstrated by both computer simulations and experiments. Based on the verification results, comparing with the conventional zero crossing detector (ZCD) based receiver, the proposed receiver is very robust against strong amplitude distortions and considerable frequency deviations happening on the backscattered signal from a passive tag.

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Section: Amplitude Distortionmentioning

confidence: 99%

Section: Symbol Detectormentioning

confidence: 99%

Robust digital receiver for EPC sensor network

Cheng

Cho

2013

J. of Syst. Eng. Electron.

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“…For example, Orthogonal Frequency Division Multiplexing (OFDM), whose voltage characteristics typically are modelled as being an approximate match to that of a Gaussian distributed signal [12]- [14]. Differing opinions persist as to the suitability of that Gaussian approximation [15]- [17] for the ensemble of OFDM carriers, although similar Central Limit Theorem (CLT) logic has also been applied to direct sequence code division multiple access (DS-CDMA) ensembles [13], [18]- [20] and generalized multi-carrier signal composites [21], [22] with similar mixed results. These techniques generally assume that the ensemble of signals making up the aggregate voltage signal converge to a single Gaussian distribution, with some work [23] focused on transforming multi-signal ensembles into more Gaussian-like distributions as part of the pre-distortion process.…”

Section: Introductionmentioning

confidence: 99%

Evaluating HPA Effects on Chaotic Sequence Spread Spectrum Detectability

Bowler,

Michaels

2023

IEEE Access

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Digital chaotic sequence spread spectrum (CSSS) communication systems provide a number of advantages for secure communications due to the apparent bandlimited Gaussian noise-like signal characteristics and the non-repeating nature of the underlying chipping sequence. The Rayleigh magnitude distribution of the signal represents a challenge, however, for transmission through linear highpower amplifiers (HPA), both due to the high peak-to-average power ratio (PAPR) and the impacts of selective signal compression on the tails of the time-domain Gaussian signals, which becomes observable by cyclostationary low probability of detection (LPD) metrics. This paper first provides an analysis of HPA compression effects on a single-carrier CSSS signal to understand the HPA-induced artifacts when pushed into compression. This work also defines and evaluates time-domain pre-distortion techniques for memoryless HPAs, validating those formulations through Matlab simulations and live measurements of predistorted CSSS signals transmitted through physical HPAs. Unlike computationally expensive statistical models used to predistort multi-carrier waveforms, this technique is shown to be a computationally efficient method to minimize the increased likelihood of adversarial detection of single-carrier waveforms. The proposed pre-distortion techniques are measured as achieving an average of 3.35 dB in improvements for linear operating range, enabling transmission of CSSS waveforms at an HPA backoff of 4.80 dB without adversely affecting kurtosis-based signal detectability.

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Detailed analysis of the impact of the distortion due to nonlinear amplifiers on BER performance

Cited by 2 publications

References 11 publications

Robust digital receiver for EPC sensor network

Robust digital receiver for EPC sensor network

Evaluating HPA Effects on Chaotic Sequence Spread Spectrum Detectability

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