Low Complexity Synchronization Algorithm for Non-Coherent UWB-IR Receivers

Miscopein, Benoît; Schwoerer, Jean

doi:10.1109/vetecs.2007.484

Cited by 15 publications

(13 citation statements)

References 8 publications

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“…This implies that the expected inter-arrival time T of consecutive pulses in the preamble is fixed and known and can be used to discard timestamps excessively affected by noise. In particular, building on what is suggested in [43], the proposed timestamping algorithm starts with the detection of the first threshold crossing at the receiver side, which is supposed to be the beginning of a new data packet. If the packet is detected starting from the ith bit in the preamble sequence (i.e., the timeout for the expected arrival time of previous i -1 bits has expired), the corresponding bit timestamp T (i) is computed according to…”

Section: Uwb Timestampingmentioning

confidence: 99%

Low Complexity UWB Radios for Precise Wireless Sensor Network Synchronization

Carbone

Cazzorla

Ferrari

et al. 2013

IEEE Trans. Instrum. Meas.

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Wireless sensor networks are becoming widely diffused because of the flexibility and scalability they offer. However, distributed measurements are significant only if the readout is coupled to time information. For this reason, network-wide time synchronization is the main concern. The objective of this paper is to exploit a very simple hardware implementation of an IR-UWB radio for realizing an accurate synchronization system for wireless sensors. The proposed solution relies on commercial-off-the-shelf discrete electronic components (rather than on specialized transceivers). It is designed for providing accurate timestamping of the packet time of arrival (TOA) to an adder-based tunable clock, which tracks the network time reference. The comprehensive set of experimental results based on prototypes, shows a TOA detection error with a standard deviation well below 1 ns. On the other hand, in the FPGAbased prototype, the synchronization performance reaches an overall synchronization error of few nanoseconds. Finally, in order to highlight the tradeoff between timestamping accuracy, clock stability, and synchronization performance, some additional simulations have been carried out: a synchronization error in the order of 1 ns is possible, if good local oscillator sources are available in the nodes and if the adjustable clock has a sufficient resolution.

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Section: Uwb Timestampingmentioning

confidence: 99%

Low Complexity UWB Radios for Precise Wireless Sensor Network Synchronization

Carbone

Cazzorla

Ferrari

et al. 2013

IEEE Trans. Instrum. Meas.

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“…The latter compares temporal distances between the received pulses and those predicted by the predefined time-hopping code. Synchronization is declared when the TH sequence is fully identified [15]. Synchronization is a critical phase in UWB systems: the number of required pulses to acquire synchronization is independent of the payload size.…”

Section: A Time-hopping Uwbmentioning

confidence: 99%

Distance Bounding Protocols on TH-UWB Radios

Benfarah

Miscopein

Gorce

et al. 2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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Relay attacks pose a real threat to the security of wireless communications. Distance bounding protocols have been designed to thwart these attacks. In this paper, we study the way to adapt distance bounding protocols to time-hopping ultra wide band (TH-UWB) radios. Two protocols are proposed which are based on the milestones of the TH-UWB radio: the time-hopping sequence and the mapping code. The security and the different merits of those protocols are analyzed

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“…In IR-UWB systems, high link robustness can be achieved by transmitting impulses with high amplitude so as to guarantee a high peak signal-to-noise ratio (SNR) at the receiver side. However, this leads to a long pulse repetition interval (PRI) typically ranging from 100 ns up to 1 µs in order to comply with the FCC regulation [3]. Such long PRI results in a large proportion of unnecessarily integrated noise energy in ED receivers, which in turn degrades the BER performance.…”

Section: Introductionmentioning

confidence: 99%

Adaptive synchronization and integration region optimization for energy detection IR-UWB receivers

Zhou

Zou

Tenhunen

et al. 2012

2012 IEEE International Conference on Ultra-Wideband

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Non-coherent energy detection (ED) IR-UWB receivers exhibit strong advantages in low data rate, low power and low cost applications such as RFID and Wireless Sensor Networks. However, the performance of ED receivers is usually suffered from the noise enhancement due to the large timebandwidth product. The integration region of the receiver integrator significantly affects the bit error rate (BER) performance. This paper presents a method of synchronization and estimating the optimal integration region (i.e., the starting point and the length of the integration window), which is based on the analysis of received signal energy capture and combined with a time of arrival (TOA) estimation. The proposed scheme is based on the symbol rate sampling and does not require a priori information about the channel delay profile. Besides, it can adapt to various indoor channel environments. The algorithm has a moderate accuracy but a very low complexity and fast synchronization speed. The validity of the proposed approach is demonstrated by numerical results using IEEE 802.15.4a channel models.

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Low Complexity Synchronization Algorithm for Non-Coherent UWB-IR Receivers

Cited by 15 publications

References 8 publications

Low Complexity UWB Radios for Precise Wireless Sensor Network Synchronization

Low Complexity UWB Radios for Precise Wireless Sensor Network Synchronization

Distance Bounding Protocols on TH-UWB Radios

Adaptive synchronization and integration region optimization for energy detection IR-UWB receivers

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