A Low-Cost Time-Hopping Impulse Radio System for High Data Rate Transmission

Molisch, Andreas F.; Li, Ye Geoffrey; Nakache, Y.-P.; Orlik, Philip V.; Miyake, Makoto; Wu, Yunnan; Gezici, Sinan; Sheng, Harry; Kung, Sun‐Yuan; Kobayashi, Hisashi; Poor, H. Vincent; Haimovich, Alexander M.; Zhang, Jinyun

doi:10.1155/asp.2005.397

Cited by 23 publications

(15 citation statements)

References 29 publications

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“…Among the architectures in IR UWB, the energy detector (ED) based on a simple schottky diode and a capacitor is by far the less complex. The other alternative is the transmitted reference (TR) receiver [6], [7] or coherent detector using a Rake receiver [5], [14]. With regards to the ED receiver these electronic architectures are more complex with the necessity of analog delay lines and/or frequency mixers.…”

Section: Imentioning

confidence: 99%

EM channel estimation in a low-cost UWB receiver based on energy detection

Mekki

Danger

Miscopein³

et al. 2008

2008 IEEE International Symposium on Wireless Communication Systems

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Section: Imentioning

confidence: 99%

EM channel estimation in a low-cost UWB receiver based on energy detection

Mekki

Danger

Miscopein³

et al. 2008

2008 IEEE International Symposium on Wireless Communication Systems

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“…Fig. 1), [24]. The number of pulses is a compromise between the requirements for a sufficient number of chips per frame, and the necessity of having a sufficient number of frames for each symbol.…”

Section: Iic Psd Of Th-ir With Short Th Sequencementioning

confidence: 99%

Spectral shaping of UWB signals for time-hopping impulse radio

Nakache

Molisch

2006

IEEE J. Select. Areas Commun.

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This paper studies the design of signaling waveforms for time-hopping impulse radio (TH-IR) with limits on the power spectral density. Such restrictions are imposed by the spectral mask prescribed by frequency regulators for ultrawideband (UWB) signals. The "conventional" TH-IR system with pulse-position modulation and time-hopping multiple access gives rise to spectral lines that either violate the regulations, or require a significant power back-off. To remedy this situation, we propose the use of polarity randomization, which eliminates the spectral lines and also leads to a smoothing of the continuous part of the spectrum. We analyze different variants of the polarity randomization, considering short and long randomization sequences, as well as symbol-based or pulse-based randomization. We analyze the effect of this technique on both PPM and BPSK modulation. IEEE Journal on Selected Areas in CommunicationsThis work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved.

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“…Analog UWB receivers, such as analog Rake (e.g., [1]) and Transmitted Reference (TR) systems [2], [3], avoid the need for high speed Analog-to-Digital Converters (ADC), but come at the cost of performance degradation and limited flexibility. Rake receivers cannot achieve the optimal bit error rate (BER) of the matched filter receiver since the number of fingers must be small for design complexity reasons [4], [5], whereas typical UWB channels present a high number of resolvable paths.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a flexible subsampling receiver for pulsed UWB signals

Vanderperren

Dehaene

Leus

2009

IEEE Trans. Wireless Commun.

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Abstract-This paper presents a flexible digital receiver for pulsed Ultra-Wideband (UWB) communications which is sampling below Nyquist rate. This receiver can trade demodulation performance for sampling rate, i.e. power consumption. The bit error rate for pulse amplitude and pulse position modulations is evaluated in AWGN and typical UWB channels. The performance of several types of equalizer is compared, taking into account their implementation complexity. A suboptimal but implementation efficient Minimum Mean-Square Error (MMSE) equalizer which reaches performances similar to the ideal MMSE equalizer is proposed. The impact of imperfect knowledge of the propagation channel and signal-to-noise ratio, due to the limited number of training symbols, on the performance of the receiver is assessed. Finally, the receiver architecture and implementation cost are discussed. The proposed subsampling receiver provides an attractive alternative to classical architectures based on correlation with a template.

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A Low-Cost Time-Hopping Impulse Radio System for High Data Rate Transmission

Cited by 23 publications

References 29 publications

EM channel estimation in a low-cost UWB receiver based on energy detection

EM channel estimation in a low-cost UWB receiver based on energy detection

Spectral shaping of UWB signals for time-hopping impulse radio

Performance analysis of a flexible subsampling receiver for pulsed UWB signals

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