A Combined Chirp Signal Modulation Technique for Multiple Access System

Meng, Fanman; Gu, Xuemai

doi:10.3923/itj.2011.416.421

Cited by 8 publications

(1 citation statement)

References 9 publications

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“…The technology of multiple access using chirp signals were first referred by Cook [9]. MAI mitigation methods used in common CDMA system can be directly used in this chirp CDMA, while using frequency-shift keying (FSK) may cause undesirable MAI [10].…”

Section: Introductionmentioning

confidence: 99%

Design and Detection of Multilinear Chirp Signals for Underwater Acoustic Sensor Networks

Cheng

Chen

Yuan

2015

International Journal of Distributed Sensor Networks

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In Underwater Acoustic Sensor Networks (UW-ASNs), some key problems have attracted more and more attention, including power consumption, performance of multiple access, and complexity of node. Motivated by finding reduced power consumption and improved performance of multiple access in UW-ASNs, a multilinear chirp-Code Division Multiple Access (MLC-CDMA) scheme is proposed. The differences between single slope chirp signal and multilinear chirp signal are analyzed in the paper. At the receiving end, a new detection technique called mixing-change rate along with fractional Fourier transform (MCR-FrFT) is proposed to detect the multirate chirp (MRC) signal and reduce complexity of node. There are two steps to realize the detection technique MCR-FrFT. By using the MCR-FrFT, the computation of detection can be decreased to 50% compared with direct FrFT. The simulation results indicate that, using the MCR-FrFT technique, the different users' signal can be separated and detected rapidly.

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Section: Introductionmentioning

confidence: 99%