A robust high speed indoor wireless communications system using chirp spread spectrum

Pinkney, JH; Sesay, A.B.; Nichols, S.T.; Behin, R.

doi:10.1109/ccece.1999.807175

Cited by 14 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The various TOF-based locationsensing techniques are listed Table 1. There are two solutions that can satisfy the required accuracy such as ultra wide band (UWB) [9,10] and chirp spread spectrum (CSS) [11,12]. The UWB-based technique has problems however.…”

Section: Overview Of Rf Communication-based Location-sensing Systemsmentioning

confidence: 99%

“…Firstly, the transceiver is cheaper than the UWBs. Secondly, it does not require synchronization time in distance estimation through use of a symmetric double-sided two way ranging (SDS-SWR) technique [12]. Note that there is processing delay time associated in the RF communication between a receiver and a tag, which is much longer than the TOF of RF signal, and so the internal clock of receivers and tags should be synchronized.…”

Section: Overview Of Rf Communication-based Location-sensing Systemsmentioning

confidence: 99%

See 1 more Smart Citation

RFID-based location-sensing system for safety management

Kim

2011

Pers Ubiquit Comput

View full text Add to dashboard Cite

This paper focuses on an active radio frequency identification (RFID)-based location-sensing system for enhancing the worker's safety under a cargo crane in a steel industry. For the purpose, the time of flight (TOF)-based distance sensing RFID system with location trilateration algorithm is developed to monitor workers' position. However, RF signal is easily affected by the surrounding environmental conditions, it is difficult to obtain reliable positional information under the restricted environmental conditions of the crane. For the problem, this paper introduces two new improvements. Firstly, circular polarization antennas are developed, which is highly effective for reducing an error in the distance estimation by transceiving RF signals with less dependance on its orientation. Secondly, a three-dimensional location-sensing algorithm that facilitates a distance and position filter is developed for enhancing accuracy by reducing a large error in the estimated distance. The field experimental results performed in the POSCO steel company demonstrate that the developed system is capable of finding target positions with significantly improved accuracy and effectiveness.

show abstract

Section: Overview Of Rf Communication-based Location-sensing Systemsmentioning

confidence: 99%

Section: Overview Of Rf Communication-based Location-sensing Systemsmentioning

confidence: 99%

RFID-based location-sensing system for safety management

Kim

2011

Pers Ubiquit Comput

View full text Add to dashboard Cite

show abstract

“…Chirp modulation or linear frequency modulation (LFM) was first used in [13]. Since then, chirp signals have been used as a communication technology that can enable low data rate, robust, low-power (LPD/LPI) wireless communications on simple-design, lowcost transceivers in different applications including indoor wireless communications [14], multiuser applications [15,16], and WLAN [17] and WPAN [18] applications. Chirp signals also have been proposed in the UWA communications literature as highly reliable but low data rate alternatives [10,19,20].…”

Section: Chirp-based Lpd/lpi Schemementioning

confidence: 99%

Chirp-based LPD/LPI underwater acoustic communications with code-time-frequency multidimensional spreading

Demirors

Melodia

2016

Proceedings of the 11th ACM International Conference on Underwater Networks &Amp; Systems - WUWNet '16

View full text Add to dashboard Cite

Most underwater acoustic communication systems incorporate well-recognized, easily detectable narrowband signals modulated over low-frequency carriers at high transmission powers, which ultimately limits LPD/LPI performance of the communication scheme. While there have been promising works concentrating on LPD/LPI performance, they are for the most part based on direct-sequence spread spectrum (DSSS) techniques, which have been shown to be blindly detectable in previous work at relatively low SINR values. As a result, there is likely significant room to improve the LPD/LPI performance of underwater acoustic communication schemes. To this end, in this paper, we propose the preliminary design of a novel communication scheme based on transmitting chirp signals that are further spread over a multidimensional domain spanning code, time, and frequency. We evaluated the performance of the proposed scheme both with simulation and experimental studies.

show abstract

“…These signals are robust to multipath interference and can realize higher processing gains and have been used in wireless communications to improve the performance due to its antijamming characteristic [1]. Chirp signals have also been used in various other applications such as combating multipath interference [2], spread spectrum techniques [3], multiple-access schemes [4], equalization [5], and channel estimation [6].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of MRC-chirp system over independent and correlated fading channels

Khan

Rao

Wang

2013

2013 26th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)

View full text Add to dashboard Cite

In this paper, chirp modulation is proposed to employ in Maximal Ratio Combining (MRC) diversity, referred to as MRCChirp system. Moment generating function (MGF) approach is used to derive easy-to-compute expressions for average bit error probability (ABEP) for two fading situations. Firstly, independent fadings with Rayleigh and Nakagami-statistics are considered. Next, an exponentially correlated fading environment with Nakagami-statistics is considered. The ABEP performance of the proposed system is illustrated using analytical expressions and using extensive Monte Carlo simulations. Numerical results show close agreement of analytical work with those of simulations. A discussion of numerical results on the performance of MRC-Chirp system as a function of diversity order , chirp modulation parameters, and fading parameters is presented.

show abstract

A robust high speed indoor wireless communications system using chirp spread spectrum

Cited by 14 publications

References 8 publications

RFID-based location-sensing system for safety management

RFID-based location-sensing system for safety management

Chirp-based LPD/LPI underwater acoustic communications with code-time-frequency multidimensional spreading

Performance analysis of MRC-chirp system over independent and correlated fading channels

Contact Info

Product

Resources

About