On the UWB system coexistence with GSM900, UMTS/WCDMA, and GPS

Hämäläinen, Matti; Hovinen, Veikkò; Tesi, R.; Iinatti, Jari; Latva-aho, Matti

doi:10.1109/jsac.2002.805242

Cited by 221 publications

(111 citation statements)

References 3 publications

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“…Appropriate modulation techniques include OOK (Foerster et al, 2001) and particularly PPM and PAM (Hämäläinen et al, 2002). A given UWB communication system will be a mixture of these techniques, leading to signals based on, for example, TH-PPM, TH-BPAM or DS-BPAM.…”

Section: Th-pam and Th-ppm Uwb System Modelmentioning

confidence: 99%

Fine Synchronization in UWB Ad-Hoc Environments

Hizem¹,

Bouallègue²

2011

Novel Applications of the UWB Technologies

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Section: Th-pam and Th-ppm Uwb System Modelmentioning

confidence: 99%

Fine Synchronization in UWB Ad-Hoc Environments

Hizem¹,

Bouallègue²

2011

Novel Applications of the UWB Technologies

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“…The Federal Communications Commission's (FCC) ruling released the band spanning from 3.1 to 10.6 GHz in the USA for UWB [2]. In [3], UWB communications were proposed for both Wireless Sensor Networks (WSN) and Personal Area Networks (PAN). Furthermore, the IEEE 802.15.3a standardazition task group has ratified a standardrized channel model to be used for the evaluation of PAN physical layer protocols [4].…”

Section: Introductionmentioning

confidence: 99%

EXIT Chart Aided Design of DS-CDMA UltraWideBand Systems Using Iterative Decoding

Riaz

El‐Hajjar

Ahmed

et al. 2008

2008 IEEE 68th Vehicular Technology Conference

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Abstract-This paper presents a novel UltraWideBand (UWB), Direct Sequence Code Division Multiple Access (DS-CDMA) aided system designed for the IEEE 802.15.3a UWB channel specifications. Substantial performance improvements can be attained by serially concatenated channel encoding combined with a Unity Rate Code (URC). We compare the performance of the iterative aided decoding Correlation (Corr) and Minimum Mean Square Error (MMSE) detectors exchanging extrinsic information between the URC's decoder as well as the outer Recursive Systematic Convolutional (RSC) code's decoder. Moreover, the iterative decoding convergence analysis of the proposed system is carried out with the aid of Extrinsic Information Transfer (EXIT) charts. As expected, the iteratively decoded fully-loaded system employing MMSE detection outperforms its counterpart employing the equivalent Corr detection. Explicitly, UWB DS-CDMA using the MMSE detector attains a BER of 10 −5 at= 2dB when supporting U = 32 users employing i = 12 decoding iterations, while the same system using the Corr detector operates at BER-10 −1 .

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“…특히, 공공의 안전을 위한 GPS 해당하는 GPS 시스템과 원하지 않는 신호인 초 광 대역 UWB 시스템에 의한 간섭 영향을 분석하였다 [3] . 또한 간섭원은 다양한 UWB 시스템 중 실외 통신 용 휴대 UWB 시스템을 설정하였다 [4] . 일반적으로 C/A 코드를 이용한 표준 GPS(Standard Positioning GPS)인 경우에 3 m 이내의 측위 오차가 가능하고, 군사용 [5] .…”

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Analysis of the Protection Ratio of GPS System in the Presence of RF Interference Radiated by UWB System

Cho¹,

Shim²,

Lee³

et al. 2011

The Journal of Korean Institute of Electromagnetic Engineering

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This paper analyzes potential interference effects of Ultra Wide Band(UWB) on Global Positioning System(GPS) which is providing safety service. For the interference analysis, positioning error method is used to determine the minimum protection distance to meet positioning error of 2.5 m below and Minimum Coupling Loss(MCL) method is used to determine the required protection ratio(I/N) from the protection distance of UWB transmitter and GPS receiver to meet positioning error of 2.5 m below. In a result, the minimum protection distance to meet positioning error of 2.5 m below was about 10 m and the protection ratio to meet positioning error 2.5 m below was -20 dB. The protection ratio proposed in this paper is the same value of the protection ratio of safety service proposed by ITU-R. The obtained protection ratio can be used for the protection standard of domestic GPS system for the safe of life service.

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On the UWB system coexistence with GSM900, UMTS/WCDMA, and GPS

Cited by 221 publications

References 3 publications

Fine Synchronization in UWB Ad-Hoc Environments

Fine Synchronization in UWB Ad-Hoc Environments

EXIT Chart Aided Design of DS-CDMA UltraWideBand Systems Using Iterative Decoding

Analysis of the Protection Ratio of GPS System in the Presence of RF Interference Radiated by UWB System

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