On the Performance of Wide-Bandwidth Signal Acquisition in Dense Multipath Channels

Suwansantisuk, Watcharapan; Win, Moe Z.; Shepp, Larry

doi:10.1109/tvt.2005.856196

Cited by 84 publications

(45 citation statements)

References 28 publications

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“…The introduction of UWB in wireless communication has brought improvements regarding these sources of errors [8]. Concerning the UWB technique, previous investigations have raised major issues, such as the complexity of the signal processing at the reception [11,12]. Therefore, UWB has been associated with TR [13,14], especially in multi-users communication systems, in order to solve part of these problems and to report some of the noted complexity at the transmitter level.…”

Section: Ultra-wideband Radio Techniquementioning

confidence: 99%

Advanced Train Positioning/Communication System

Elbahhar¹,

Heddebaut²

2018

Modern Railway Engineering

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In the past, in order to ensure train positioning as well as ground-to-train information exchange, railways have adopted various technologies. Over time, each new generation of equipment enriched the global information exchange but, as a consequence, necessitated higher data rate transfers. For the positioning functionality, the existing localisation systems are still limited, since most of them require an infrastructure installation with constraints such as laying equipment between the rails or having high database maintenance requirements and computational costs. Moreover, some of them accumulate errors (odometers and inertial sensors) or offer limited coverage in shadowed areas (GNSS, etc.). Currently, in railway applications, a widely used localization system is based on proprioceptive sensors embarked in the train. This on-board system is coupled to the use of balises located at ground between the rails. These balises are kilometre markers. They are used to compensate for the drift of the localization information computed using the proprioceptive sensors alone, when the train moves. The balises provide absolute localization information whenever the train passes over them. They can also provide spot communication during the short period of time when trains are passing over them. In the first part of this chapter, techniques for achieving train positioning and data exchanges between trains and infrastructure are introduced. In the second part, a new balise is proposed. Particular attention is paid to the contribution of this new solution in terms of localization error and communication performances.

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Section: Ultra-wideband Radio Techniquementioning

confidence: 99%

Advanced Train Positioning/Communication System

Elbahhar¹,

Heddebaut²

2018

Modern Railway Engineering

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“…It is also assumed that the Rayleigh fading is sufficiently slow for the faded envelope to remain constant over τ D chip intervals. The Neyman-Pearson criterion is adopted [6,7], which leads to a Constant False-Alarm Rate (CFAR). The received signal of the MIMO over the multipath Rayleigh-fading channel can be expressed mathematically as in (4).…”

Section: System Modelmentioning

confidence: 99%

Performance Analysis and Comparison of Full Chip and Half Chip Rate DC and NC Code Acquisition in MIMO DSCDMA over Uncorrelated Rayleigh Wireless Channel

Kumar¹,

Kumar²

2011

ISRN Communications and Networking

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This paper presents the performance analysis and comparison of full chip and half chip rate of noncoherent (NC) and differentially coherent (DC) code acquisition scheme in (multiple input-multiple output) MIMO assisted by direct sequence spread spectrum (DS-CDMA) wireless system when communicated over uncorrelated Rayleigh channel. Four schemes are investigated, namely, SISO with full chip rate, SISO with Half chip rate, MIMO with full chip rate, and MIMO with half chip rate by varying the code acquisition technique. The simulation is done in RF signal processing Lab using matlab tool box, and the performance metrics are considered, namely, Bit Error Rate (BER) and mean acquisition time (MAT). The simulation results indicate that DC performance is superior than NC in both full chip and half chip rate and also shown that half chip performance is better than full chip in both DC and NC code acquisition methods.

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“…Aiming at reducing the search time, (Ibrahim & Buehrer, 2006) proposes to exploit the statistical knowledge (derived from first phase "coarse estimation") and clustered nature of arriving paths to improve the performance on the fine acquisition stage reducing the acquisition time in dense multipath environment. Further work on the development of advanced search strategies to reduce the mean acquisition time involved in the synchronization process appears in (Gezici et al, 2003;Renzo et al, 2008;Suwansantisuk & Win, 2007;Suwansantisuk et al, 2005). Therefore, important aspects to evaluate performance/complexity trade-offs are:…”

Section: Time Of Arrival Estimationmentioning

confidence: 99%