Spread spectrum communications using chirp signals

Springer, Andreas; Gugler, W.; Huemer, Mario; Reindl, L.; Ruppel, C.C.W.; Weigel, Robert

doi:10.1109/eurcom.2000.874794

Cited by 126 publications

(77 citation statements)

References 5 publications

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“…In addition to those applications, it is also possible to use a rapidly modulated signal as a carrier wave for communications [15]. This suggests that the same signal could be used for both power transfer and communications.…”

Section: B Applicationsmentioning

confidence: 99%

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Reducing microwave absorption with fast frequency modulation

Qin

Hübler

2017

Phys. Rev. E

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We study the response of a two-level quantum system to a chirp signal, using both numerical and analytical methods. The numerical method is based on numerical solutions of the Schrödinger solution of the two-level system, while the analytical method is based on an approximate solution of the same equations. We find that when two-level systems are perturbed by a chirp signal, the peak population of the initially unpopulated state exhibits a high sensitivity to frequency modulation rate. We also find that the aforementioned sensitivity depends on the strength of the forcing, and weaker forcings result in a higher sensitivity, where the frequency modulation rate required to produce the same reduction in peak population would be lower. We discuss potential applications of this result in the field of microwave power transmission, as it shows applying fast frequency modulation to transmitted microwaves used for power transmission could decrease unintended absorption of microwaves by organic tissue.

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Section: B Applicationsmentioning

confidence: 99%

“…The final assumption is that there is no anisotropy in the material. In such a scenario, the absorption would be described by Equation (15).…”

Section: A Relation To Peneration Depthmentioning

confidence: 99%

Reducing microwave absorption with fast frequency modulation

Qin

Hübler

2017

Phys. Rev. E

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“…The concept of chirp pulse based UWB (Chirp-UWB) [3] is that the system spectrum of the chirp spread spectrum (CSS) technology based UWB system satisfies FCC regulation and also generates the desired power spectrum to avoid the interference with NB systems. Chirp-UWB system has remarkable superiority such as low complexity, long transmission distance, avoidance of high peak to average ratio and so on.…”

Section: Introductionmentioning

confidence: 99%

CF based performance analysis of chirp-UWB system over multipath channels

Wang

Bai

Gao

et al. 2014

16th International Conference on Advanced Communication Technology

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Since the energy of chirp waveform distributes evenly in time domain, chirp waveform has the advantage of low peakto-average power ratio. In this paper, we first employ chirp function to generate the ultra-wideband (UWB) pulse for narrow-band interference (NBI) suppression, then the simplified characteristic function (CF) method is proposed to evaluate the NBI suppression performance of the direct sequence spread spectrum binary phase shift keying (DS-BPSK) chirp pulse based UWB (Chirp-UWB) system over multipath channels. Simulation results and theoretical analysis show that the proposed CF based performance analysis of Chirp-UWB system not only superiors to the traditional Gaussian pulse based UWB system, but also outperforms the conventional approximate analysis method in accuracy and complexity.

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“…The communication system using the non-linear chirp signal performs better than the conventional communication and interference suppression schemes because it can increase the data transmission rate and decrease interference at the same time [18][19]. Therefore, the non-linear chirp signal has been a widely used communication system to improve the bit error rate (BER) performance [20][21]. However, this paper proposes a new non-linear chirp signal modulation system for navigation systems.…”

Section: Introductionmentioning

confidence: 99%

A Mitigation of Multipath Ranging Error Using Non-linear Chirp Signal

Kim¹,

Heo²,

Jee³

2013

Journal of Electrical Engineering and Technology

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-While the chirp signal is extensively used in radar and sonar systems for target decision in wireless communication systems, it has not been widely used for positioning in indoor environments. Recently, the IEEE 802.15.4a standard has adopted the chirp spread spectrum (CSS) as an underlying technique for low-power and low-complexity precise localization. Chirp signal based ranging solutions have been established and deployed but their ranging performance has not been analyzed in multipath environments. This paper presents a ranging performance analysis of a chirp signal and suggests a method to suppress multipath error by using a type of non-linear chirp signal. Multipath ranging performance is evaluated using a conventional linear chirp signal and the proposed non-linear chirp signal. We verify the feasibility of both methods using two-ray multipath model simulation. Our results demonstrate that the proposed non-linear chirp signal can successfully suppress the multipath error.

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Spread spectrum communications using chirp signals

Cited by 126 publications

References 5 publications

Reducing microwave absorption with fast frequency modulation

Reducing microwave absorption with fast frequency modulation

CF based performance analysis of chirp-UWB system over multipath channels

A Mitigation of Multipath Ranging Error Using Non-linear Chirp Signal

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