Integrated true-time-delay-based ultra-wideband array processing

Hashemi, Hossein; Chu, Ta-Shun; Roderick, Jonathan

doi:10.1109/mcom.2008.4623722

Cited by 107 publications

(44 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This concludes that it is possible to use the small UWB antennas for beam steering in a certain frequency range. For further investigations the pulsers will be upgraded to become adjustable active delay lines [1].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Towards a hardware implementation of ultra-wideband beamforming

Gentner

Gärtner

Hilton

et al. 2010

2010 International ITG Workshop on Smart Antennas (WSA)

View full text Add to dashboard Cite

Abstract-This paper discusses and analyses the hardware implementation of an ultra-wideband (UWB) beamformer for UWB Impulse Radio data transmission. We use a Complex Programmable Logic Device (CPLD) acting as the binary baseband information source. The CPLD provides input to a pulse shaper and subsequently to a four-element array of UWB antennas. This smart antenna system comprises the digital baseband part, the radio-frequency frontend, and the antenna array. For this contribution, we discuss the design, implementation, and UWB measurement results obtained in an anechoic chamber.

show abstract

Section: Discussionmentioning

confidence: 99%

“…This topic has raised increased interest ( [1] and [2]) for future wireless networks in indoor environments and for short-range, power-efficient connectivity at medium to high data rates. The potential applications are manifold, e.g.…”

Section: Introductionmentioning

confidence: 99%

Towards a hardware implementation of ultra-wideband beamforming

Gentner

Gärtner

Hilton

et al. 2010

2010 International ITG Workshop on Smart Antennas (WSA)

View full text Add to dashboard Cite

show abstract

“…1. A received wave with an angle of arrival, θ, reaches each one of the 4 antennas at different moments in time [2].…”

Section: Beamformers and Delay Line Conceptmentioning

confidence: 99%

A Distributed Variable Delay Line for Wideband Beam-Formers

Dabbagh¹,

Khalaf²,

Hawa³

2012

PIER Letters

View full text Add to dashboard Cite

Abstract-A fully integrated CMOS wideband distributed variable delay line for time array beam-formers is presented. The delay line works over a full differential mode, and the delay cell function is based on differential amplifiers with active inductive peaking loads. A delay resolution of 15 ps is obtained with a maximum delay capability of 150 ps. The designed active delay line provides 3 scanning angles with 8.6 • of spatial resolution. This delay line is applicable for a 4 channel beam-former with an operational bandwidth of 500 MHz centered at 5 GHz. Our active delay line consumes up to 352 mW of power from a 2.5 V supply. The circuit is simulated in standard 0.25 µm BiCMOS process and occupies 252 µm × 123 µm of silicon area.

show abstract

“…The advantage of this configuration arises from the fact that decreasing the amount of delay in a feedback loop enhances its noise performance as depicted by (5). Also, cascading two loops with attenuated noise, results in better SNR improvement.…”

Section: A System Responsementioning

confidence: 99%

Reduced-size ultra-wideband true-time-delay beam-forming receivers

Helmy

Entesari

2011

2011 IEEE International Symposium of Circuits and Systems (ISCAS)

View full text Add to dashboard Cite

This paper presents two novel ultra-wideband (UWB) true-time-delay beam-forming receiver architectures to reduce the size of the receiver compared to the reported beam-forming receivers. Size reduction is due to lowering the total amount of delay by half and employing a negative feedback loop in the receiver. The proposed systems are analyzed to investigate their response, Inter-symbol-Interference (ISI) rejection, stability, beam width, signal to noise ratio (SNR) and the effect of nonidealities. The simulation results prove that the first proposed system has lower area for the same number of antennas and half the delay compared to the existing receivers at the cost of lower SNR and wider beam width. The second system results in a smaller size and better SNR for half the delay compared to the existing receivers at the cost of higher complexity.

show abstract

Integrated true-time-delay-based ultra-wideband array processing

Cited by 107 publications

References 7 publications

Towards a hardware implementation of ultra-wideband beamforming

Towards a hardware implementation of ultra-wideband beamforming

A Distributed Variable Delay Line for Wideband Beam-Formers

Reduced-size ultra-wideband true-time-delay beam-forming receivers

Contact Info

Product

Resources

About