Gaussian pulse Generators for subbanded ultra-wideband transmitters

Wentzloff, David D.; Chandrakasan, Anantha P.

doi:10.1109/tmtt.2006.872053

Cited by 111 publications

(76 citation statements)

References 12 publications

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“…Indeed, reducing the insertion losses involves increasing the size of the transistor, leading to increased stray capacitances, which degrades the insertion losses at high frequencies and reduces isolation from the output (Rui Xu et al, 2006). The switching circuit can also be achieved using a double balanced mixer similar to a Gilbert cell (Wentzloff & Chandrakasan, 2006) (Datta et al, 2007). In (Wentzloff & Chandrakasan, 2006), the currents in the differential pairs are summed in order to cancel out LO leakage and improve isolation.…”

Section: Fig 1 Principle Of Frequency Transposition Architecturesmentioning

confidence: 99%

“…The switching circuit can also be achieved using a double balanced mixer similar to a Gilbert cell (Wentzloff & Chandrakasan, 2006) (Datta et al, 2007). In (Wentzloff & Chandrakasan, 2006), the currents in the differential pairs are summed in order to cancel out LO leakage and improve isolation. Moreover, this topology makes it possible to generate BPSK signals by switching the baseband signal between the + or − inputs.…”

Section: Fig 1 Principle Of Frequency Transposition Architecturesmentioning

confidence: 99%

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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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Section: Fig 1 Principle Of Frequency Transposition Architecturesmentioning

confidence: 99%

Section: Fig 1 Principle Of Frequency Transposition Architecturesmentioning

confidence: 99%

Design of CMOS UWB Pulse Generators

Gaubert¹,

Bourdel²

2010

Ultra Wideband

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“…Pulse-shaping techniques that eke out the greatest legally allowed transmission power are critical to enhancing UWB performance. Various electrical and optical pulse generator architectures have been proposed; most focused on the widely adopted Gaussian, monocycle, and doublet pulses [3]- [10]. Two approaches exist for electronic pulse-based transmitters: a baseband pulse is up-converted to a center frequency in the UWB band by mixing with a local oscillator, or a pulse is generated that falls directly in the UWB band without frequency translation.…”

Section: Introductionmentioning

confidence: 99%

“…Two approaches exist for electronic pulse-based transmitters: a baseband pulse is up-converted to a center frequency in the UWB band by mixing with a local oscillator, or a pulse is generated that falls directly in the UWB band without frequency translation. In either case, a baseband impulse may excite a filter that shapes the pulse, or the pulse may be directly synthesized at radio frequency (RF) with no additional filtering [3]. For instance, a near Gaussian pulse is shaped from a triangular input signal and up-converted to a 528-MHz-wide channel in the 3.1-10.6-GHz UWB band [3].…”

Section: Introductionmentioning

confidence: 99%

“…In either case, a baseband impulse may excite a filter that shapes the pulse, or the pulse may be directly synthesized at radio frequency (RF) with no additional filtering [3]. For instance, a near Gaussian pulse is shaped from a triangular input signal and up-converted to a 528-MHz-wide channel in the 3.1-10.6-GHz UWB band [3]. Pulse shaping is integrated into the mixer, performing upconversion, and shaping in one circuit.…”

Section: Introductionmentioning

confidence: 99%

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Generation of Power-Efficient FCC-Compliant UWB Waveforms Using FBGs: Analysis and Experiment

Abtahi

Magné

Mirshafiei

et al. 2008

J. Lightwave Technol.

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Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Zhang

El-Gamel

Bayoumi

2008

Circuit Theory & Apps

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SUMMARYGaussian pulse is widely used in communication systems. The true Gaussian function is not physically realizable, but it can be approximated through linear functions. This paper presents a Gaussian pulse approximation approach to generate a quasi-Gaussian pulse by using the transient response of a CMOS inverter. The basic structure of the proposed design includes a digital variable square pulse generator, a Gaussian pulse generator and a small antenna model. The digital variable square pulse generator makes the amplitude and width of the generated quasi-Gaussian pulse tunable. The proposed pulse generator works well for three different electrical small antenna models. The simulation results show that the generated pulse approximates the Gaussian shape very well and the radiated signal at the antennas is compliant with the Federal Communication Commission's spectral mask for the 0-960 MHz band. The simple structure of this Gaussian pulse generator lends itself to a low-power, single-chip UWB transceiver solution.

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Gaussian pulse Generators for subbanded ultra-wideband transmitters

Cited by 111 publications

References 12 publications

Design of CMOS UWB Pulse Generators

Design of CMOS UWB Pulse Generators

Generation of Power-Efficient FCC-Compliant UWB Waveforms Using FBGs: Analysis and Experiment

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

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