Conference Paper

Data-Aided Timing Acquisition in UWB Differential Transmitted Reference Systems.

Center for Sensorsytems, Siegen Univ.
DOI: 10.1109/PIMRC.2006.254398 Conference: Proceedings of the IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2006, 11-14 September 2006, Helsiniki, Finland
Source: DBLP

ABSTRACT Timing acquisition constitutes a major challenge in realizing highly efficient ultra-wideband (UWB) systems for applications such as indoor wireless communications. To bypass channel estimation the transmitted reference (TR) signaling is a promising candidate. In this paper, we suggest a novel data-aided timing acquisition technique for frame-level synchronization in differential transmitted reference (DTR) UWB systems. Being based on parallel integrate-and-dump (I&D) operations within different pulse-pair correlator branches, the proposed timing acquisition technique performs particularly well at higher signal-to-noise ratio (SNR). The good performance of it is confirmed by simulation results

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    ABSTRACT: The timing acquisition constitutes a major challenge in ultra-wideband impulse radio (UWB-IR). The challenge is not only in detecting pulses with very short duration, but also in considering RMS delay spread caused by multipath channel. This paper presents a novel data-aided synchronization acquisition algorithm. With judiciously designed algorithm and training sequence, the proposed algorithm overcomes the impact of RMS delay spread. This algorithm is based on differential transmitted reference receivers. It can be applied for low complexity and low-data-rate (LDR) applications, such as sensors networks. The simulation results demonstrate that the proposed acquisition algorithm has better performance in probability of detection than conventional acquisition algorithms. In addition it has low complexity.
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    ABSTRACT: Synchronization remains one of the biggest challenges in the ultra-wideband (UWB) impulse radio system. In this paper, a frame-level synchronization algorithm is proposed in differential transmitted reference (DTR) UWB systems in the multipath environment. The signal structure is judiciously designed with the aided data and m-sequence code. Enjoying the fine property of m-sequence autocorrelation function, the proposed algorithm can suppress the noise and inter-frame interference. Moreover, it has very low complexity. Simulation results demonstrate the good performance of the proposed acquisition scheme.
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    ABSTRACT: Blind synchronization constitutes a major challenge in realizing highly efficient ultra wide band (UWB) systems because of the short pulse duration which requires a fast synchronization algorithm to accommodate several asynchronous users. In this paper, we present a new Code Block Synchronization Algorithm (CBSA) based on a particular code design for a non coherent transmission. Synchronization algorithm is applied directly on received signal to estimate timing offset, without needing any training sequence. Different users can share the available bandwidth by means of different spreading codes with different lengths. This allows the receiver to separate users, and to recover the timing information of the transmitted symbols. Simulation results and comparisons validate the promising performance of the proposed scheme even in a multi user scenario. In fact, the proposed algorithm offers a gain of about 3 dB in comparison with reference [5].