Efficient multiple-access communications using multi-user chirp modulation signals

El‐Khamy, Said E.; Shaaban, Shawki; Tabet, E.A.

doi:10.1109/isssta.1996.563498

Cited by 43 publications

(13 citation statements)

References 6 publications

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“…In [9], a different system where transmissions from multiple reference nodes have to be sufficiently lagged over a time epoch to avoid collisions was presented, but it needs a lot of time to localize the target sensor. In [10], the authors introduced a method for designing localization signal based on Code Division Multiple Access (CDMA), and the modulation mode is ASK; but as described in [11] about the physical layer of underwater channel, ASK modulation is not suitable for underwater channel because of high attenuation. What is more, the location signals are transmitted that are sufficiently lagged, which is the same as [9].…”

Section: Related Workmentioning

confidence: 99%

A TDoA Localization Scheme for Underwater Sensor Networks with Use of Multilinear Chirp Signals

Cheng¹,

Lin²,

Chen³

et al. 2016

Mobile Information Systems

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Due to the multipath, Doppler, and other effects, the node location signals have high probability of access collision in the underwater acoustic sensor networks (UW-ASNs), and therefore, it causes the signal lost and the access block; therefore, it constrains the networks performance. In this paper, we take the multilinear chirp (MLC) signals as the location signal to improve the anticollision ability. In order to increase the detection efficiency of MLC, we propose a fast efficient detection method called mixing change rate-fractional Fourier transform (MCR-FrFT). This method transforms the combined rates of MLC into symmetry triangle rates and then separates the multiuser signals based on the transformed rates by using FrFT. Theoretical derivation and simulation results show that the proposed method can detect the locations signals, estimate the time difference of arrival (TDoA), reduce the multiple access interference, and improve the location performance.

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Section: Related Workmentioning

confidence: 99%

A TDoA Localization Scheme for Underwater Sensor Networks with Use of Multilinear Chirp Signals

Cheng¹,

Lin²,

Chen³

et al. 2016

Mobile Information Systems

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“…6(c) and 6(d)), it has been widely used for radar applications as well as localizations [21,22]. Based on the fact that up and down chirps are nearly orthogonal, the authors in [16,23,24] also propose chirp binary orthogonal keying (BOK) for wireless communications. [25,26] uses acoustic chirp signals to measure the distance between speaker and microphone.…”

Section: Chirp Binary Orthogonal Keyingmentioning

confidence: 99%

Chirp signal-based aerial acoustic communication for smart devices

Lee

Kim²,

Choi

et al. 2015

2015 IEEE Conference on Computer Communications (INFOCOM)

122

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Smart devices such as smartphones and tablet/wearable PCs are equipped with voice user interface, i.e., speaker and microphone. Accordingly, various aerial acoustic communication techniques have been introduced to utilize the voice user interface as a communication interface. In this paper, we propose an aerial acoustic communication system using inaudible audio signal for low-rate communication in indoor environments. By adopting chirp signal, which is widely used for radar applications due to its capability of resolving multi-path propagation, the proposed acoustic modem supports long-range communication independent of device characteristics over severely frequency-selective acoustic channel. We also design a backend server architecture to compensate for the low data rate of chirp signal-based acoustic modem. Via extensive experiments, we evaluate various characteristics of the proposed modem including multi-path resolution and multiple chirp signal detection. We also verify that the proposed chirp signal can deliver data at 16 bps in typical indoor environments, where its maximum transmission range is drastically extended up to 25 m compared to the few meters of the previous research.

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“…Chirp is a sinusoidal signal whose frequency increases or decreases over a certain time interval. Even though pulse compression techniques had been actively pursued since early fifties (and invented earlier than that), the first traceable paper suggesting it for applications other than RADAR was not published until 1962 by Winkler [1]. The inherent capability of interference rejection makes chirps (with the associated modulation scheme) a candidate in spread-spectrum communication systems [2].…”

Section: Introductionmentioning

confidence: 99%

Performances of trigonometric chirp spread spectrum modulation in AWGN & rayleigh channels

Wang

Jiang

2013

Proceedings of the 8th ACM Workshop on Performance Monitoring and Measurement of Heterogeneous Wireless and Wired Networks

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Efficient multiple-access communications using multi-user chirp modulation signals

Cited by 43 publications

References 6 publications

A TDoA Localization Scheme for Underwater Sensor Networks with Use of Multilinear Chirp Signals

A TDoA Localization Scheme for Underwater Sensor Networks with Use of Multilinear Chirp Signals

Chirp signal-based aerial acoustic communication for smart devices

Performances of trigonometric chirp spread spectrum modulation in AWGN & rayleigh channels

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