A 5.2 pJ/pulse impulse radio pulse generator in 90 nm CMOS

Lee, Kin Keung; Dooghabadi, Malihe Zarre; Hjortland, Håkon A.; Naess, O.; Lande, Tor Sverre

doi:10.1109/iscas.2011.5937809

Cited by 15 publications

(7 citation statements)

References 7 publications

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“…Competitive FoM and η are measured, FoM ranges from 1.6% to 2.6% and η ranges from 2.9% to 4.3%. In [7], a DL-based MPC PG with E C = 5.2 pJ/pulse and FoM = 4.3% has been reported. Nevertheless it is relatively more sensitive to the PD variation of the DL as aforementioned.…”

Section: Resultsmentioning

confidence: 99%

“…One drawback of other DL-based MPC PGs [7,8] is that f C and BW are sensitive to the PD variation of the DL. The proposed PG is relatively less sensitive to this variation because the tank bandpass property concentrates the output energy at f o .…”

Section: Proposed Ir-uwb Pgmentioning

confidence: 99%

“…The basic idea of most published IR-UWB PGs is to use a high-frequency waveform generator (HFWG), which can be an oscillator, phase-locked loop or delay-line (DL) etc., and shape the output signal to generate the desired envelope by mainly three approaches: filtering [4], spectrum mixing [5,6] or multi-pulse combination (MPC) [7,8]. For the filtering approach, the HFWG output signal is coupled to and filtered by a pulse shaping filter so that the resultant signal can meet the spectrum regulations.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the propagation delay (PD) of the DL and output drivers with different strength, Gaussian-approximate waveforms can be obtained. The MPC approach is shown to be very energy-efficient (5.2 pJ/pulse has been reported in [7]) and small-size because it contains mainly digital gates. Nevertheless most of the MPC IR-UWB PGs operate at the low UWB band, this is because the capacitive and switching losses due to the output parasitic capacitance increase with frequency.…”

Section: Introductionmentioning

confidence: 99%

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A 2.8-7.5 Pj/Pulse Highly-Flexible Impulse-Radio Ultra-Wideband Pulse-Generator

Lee¹,

Lande²

2014

PIER C

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Abstract-A low-power on-off-keying impulse-radio (IR) ultra-wideband (UWB) pulse generator (PG) intended for wireless-powered IR-UWB radio applications is presented. The proposed PG has high flexibility, the center frequency, output power and pulse-width (PW) are controllable depending on channel conditions and data rates. Qualitative frequency-domain and transient analyses are presented. A new figure-of-merit (FoM) is proposed such that a more precise comparison between different PGs can be made. The PG is successfully implemented in a TSMC 90 nm CMOS process, measurements show the energy consumption and FoM to be 2.8-7.5 pJ/pulse and 1.6-2.6% respectively. The output swing and PW are 277-329 mV p-p and 509-1088 ps respectively. The core area is 0.092 mm 2 .

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Section: Resultsmentioning

confidence: 99%

Section: Proposed Ir-uwb Pgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 2.8-7.5 Pj/Pulse Highly-Flexible Impulse-Radio Ultra-Wideband Pulse-Generator

Lee¹,

Lande²

2014

PIER C

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“…Depending on the detected number of pulses in the incoming symbol, the appropriate threshold may be set. The output circuitry consists of a continuous-time threshold sampler [5] and an integrated symbol generator which uses the Gaussian pulse generator [12] to generate the required symbol for transmission.…”

Section: B High Speed Correlationmentioning

confidence: 99%

Continuous-time single-symbol IR-UWB symbol detection

Sudalaiyandi

Hjortland

et al. 2012

2012 IEEE International SOC Conference

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RAKE based receivers are the most challenging receiver due to its hardware implementation complexity. To build a cross-correlating RAKE receiver with on-off keying pose significant design challenges due to multipath components. Also process variations in 90 nm CMOS technology impose significant challenges in the clockless system. In this paper, a simple coherent RAKE receiver using single-bit correlation in continuous time is reported. A working chip with fully integrated digital symbol detection without any clocks, ADC and filters for simple and power efficient CMOS implementation. Optimal design of the delay elements in the tapped delayline and the use of pulse width controller blocks (PWC) along the delayline allows narrow pulses through the system. The optimized delayline combined with the continuous-time high speed counter and the match thresholder constitute a complete continuous-time RAKE receiver in CMOS. Initial chip measurement shows that a data rate of 1.5 Mbit/s with a power consumption of 0.78 mW was possible. I. INTRODUCTIONEven though viable UWB systems are not in widespread use, there are many published papers which show great potential towards short range communications requiring low power and low data-rate [1]. Ultra-wideband impulse radio (IR-UWB) is a promising technology due to its good resolution. According to [2], channel estimation, accurate synchronization and high resolution clocks forms the bottleneck to realize a power efficient UWB radio solutions. UWB signals require RAKE or correlation receivers to take full advantage of the available signal energy over a large bandwidth. Because of complexity constraints, a RAKE receiver processes only a subset of the total number of received multipath components. To mitigate the issues of correlator receivers, different configurations have been proposed [3]. Most implementations sacrifice performance for low complexity operation and lacks a power efficient CMOS implementation aiming towards a cost efficient single chip solution. Even if the receiver complexity is overcome by digital techniques, current solutions require an ADC with high sampling frequency to sample and quantize the received signal [3].Continuous-Time Binary-Value (CTBV) signal processing for IR-UWB systems has been developed [4] which is simply based on inherent CMOS process-dependent gate delays combined with a coarse quantizer or a single-bit ADC. By avoiding clocks, power efficient solutions are feasible in standard CMOS. The performance of the CTBV solution is limited by the gate delay and improves with technology scaling. Although process variations pose significant challenges, high-speed and power-efficient CMOS implementations have

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Analysis of a Transmitter System for IEEE 802.15.4a UWB Standard

Gupta²,

Yellampalli

2020

2020 2nd International Conference on Innovative Mechanisms for Industry Applications (ICIMIA)

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A 5.2 pJ/pulse impulse radio pulse generator in 90 nm CMOS

Cited by 15 publications

References 7 publications

A 2.8-7.5 Pj/Pulse Highly-Flexible Impulse-Radio Ultra-Wideband Pulse-Generator

A 2.8-7.5 Pj/Pulse Highly-Flexible Impulse-Radio Ultra-Wideband Pulse-Generator

Continuous-time single-symbol IR-UWB symbol detection

Analysis of a Transmitter System for IEEE 802.15.4a UWB Standard

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