All-digital low-power CMOS pulse generator for UWB system

Kim, H.; Park, D.; Joo, Young Hoon

doi:10.1049/el:20046923

Cited by 142 publications

(87 citation statements)

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“…A 5th-derivative Gaussian pulse, as presented in (4), is used as the source signal to drive the transmitter. C is a constant that can be chosen to comply with peak power spectral density that the FCC will permit and σ is assumed to be 51 ps to ensure that the shape of the spectrum complies with the FCC spectral mask [8]. The waveform is shown in Figure 11.…”

Section: Time-domain Characteristics Of Proposed Antennamentioning

confidence: 99%

Compact CPW-Fed Uwb Antenna With Dual Band-Notched Characteristics

Zheng¹,

Chu²

2009

PIER Letters

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Abstract-In this paper, a coplanar waveguide fed (CPW-Fed) ultrawideband (UWB) antenna with dual band-notched characteristics is proposed. Two symmetrical slots are etched from the ground plane to achieve the notched band at 5.5 GHz. The other notched band at 3.5 GHz is obtained by etching a split ring slot in the radiator. The simulation and measurement show that the proposed antenna achieves an impedance bandwidth of 3.1-10.6 GHz with VSWR < 2, except in the bands of 3.2-3.8 GHz and 4.8-6.2 GHz. A nearly omnidirectional radiation pattern and stable gain with variation less than 3 dB are also observed except in the two notched bands. Moreover, time-domain characteristics of the antenna are analyzed and discussed as well.

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Section: Time-domain Characteristics Of Proposed Antennamentioning

confidence: 99%

Compact CPW-Fed Uwb Antenna With Dual Band-Notched Characteristics

Zheng¹,

Chu²

2009

PIER Letters

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“…Gaussian second (G2) and fifth (G5) derivatives are popular choices [21,22]. We first analyze Gaussian pulse properties based on G5 pulse, and extend the analysis to other orders of Gaussian pulses in the subsequent parts.…”

Section: Analysis Of the Synchronization Schemementioning

confidence: 99%

Effects of Antennas and Propagation Channels on Synchronization Performance of a Pulse-Based Ultra-Wideband Radio System

Chen¹,

Zhang

2011

PIER

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Abstract-Synchronization performance of a pulse-based ultrawideband (UWB) system is investigated by taking into account of distortions caused by transmitter and receiver antennas and wireless propagation channels in different environments. The synchronization scheme under consideration can be achieved in two steps: a slide correlator and a phase-locked loop (PLL)-like fine tuning loop. Effects of the non-idealities are evaluated by analyzing the distortion of the received UWB pulse and subsequently the synchronization performance of the pulse-based UWB system. It is found that generally a smaller step is required for the sliding correlator due to distortions introduced by the antennas and channels. However, the fine tuning loop can always be stabilized by adjusting the loop parameters. Therefore, synchronization can always be achieved.

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“…However, these studies are characterized by the use of different combination methods. The elementary pulses can be current-combined by transistors of different sizes (Kim et al, 2004). The nature of the transistor (P or N) makes it possible to achieve the positive or negative alternation of the pulses.…”

Section: Ultra Wideband 142mentioning

confidence: 99%

Design of CMOS UWB Pulse Generators

Gaubert¹,

Bourdel²

2010

Ultra Wideband

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Analysis of the current state of the artThe techniques normally used for generating pulses in low-cost monolithic technology (CMOS or BiCMOS) are different from those usually used in hybrid technologies. The latter mainly use edge combination methods generated from SRD diodes via quarter-wave lines or stubs (Jeongwoo Han et al., 2004). In a low-cost context, these techniques are not possible, as they cannot be integrated into the desired technologies. We shall present here only the following techniques:Baseband pulse transposition -Baseband pulse filtering -Synthesis by pulse combination.This analysis is performed using circuits that have been built and measured and that can be found in the literature. Before commencing this analysis, it is necessary to point out that the figure of merit often used in pulse generation is the energy consumed by the pulse. This criteria is subject to a caveat, as it often fails to take into account the power consumed between two pulses, which means it is only relevant if the system is combined with power management (sometimes difficult to achieve, depending on the topology of the circuit). This is why we shall be presenting, wherever possible, an estimate of the total energy consumed by the pulse (Ec t =P DC /D S ) that take into account the average consumption between two pulses. The energy consumed per pulse will then be used to quantify the energy consumed during the pulse alone (), and if this is not given, it will be approximated as follows: E c =P DC *. Moreover, in order to be completely suitable, the energy consumed by the total pulse must be compared to the energy of the pulse produced (E p ) by way of the energy efficiency per pulse (n=E p /Ec t ). As this energy is rarely given, it will be estimated by assuming that the pulse is a sinusoid modulated by a gate of width  and amplitude V p (E p =.V p 2 /2R 0 ).

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All-digital low-power CMOS pulse generator for UWB system

Cited by 142 publications

References 1 publication

Compact CPW-Fed Uwb Antenna With Dual Band-Notched Characteristics

Compact CPW-Fed Uwb Antenna With Dual Band-Notched Characteristics

Effects of Antennas and Propagation Channels on Synchronization Performance of a Pulse-Based Ultra-Wideband Radio System

Design of CMOS UWB Pulse Generators

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