Switched parasitic elements for antenna diversity

Vaughan, Rodney G.

doi:10.1109/8.761082

Cited by 156 publications

(67 citation statements)

References 13 publications

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“…In [10], threshold magnitude carrier variations in time and frequency are measured. In [11] and [12], threshold magnitude-only signal-strength variation is measured in time with pseudorandom variation added via switched parasitic antenna elements [13], [17]. In [14], an ultra-wideband pulse is used to measure the channel impulse response in time.…”

Section: Related Workmentioning

confidence: 99%

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.

Young

Forman

Dowdle³

2010

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Methods to generate private keys based on wireless channel characteristics have been proposed as an alternative to standard key-management schemes. In this work, we discuss past work in the field and offer a generalized scheme for the generation of private keys using uncorrelated channels in multiple domains. Proposed cognitive enhancements measure channel characteristics, to dynamically change transmission and reception parameters as well as estimate private key randomness and expiration times.Finally, results are presented on the implementation of a system for the generation of private keys for cryptographic communications using channel impulse-response estimation at 60 GHz. The testbed is composed of commercial millimeter-wave VubIQ transceivers, laboratory equipment, and software implemented in MATLAB. Novel cognitive enhancements are demonstrated, using channel estimation to dynamically change system parameters and estimate cryptographic key strength. We show for a complex channel that secret key generation can be accomplished on the order of 100 kb/s.3 Acknowledgment

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Section: Related Workmentioning

confidence: 99%

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.

Young

Forman

Dowdle³

2010

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“…Dinger [2] proposed a reactively steerable antenna using microstrip patch elements and used a steepest descent algorithm to maximize the output interference power without any reference signal. Several studies [3][4][5][6][7] have proposed methods to control antenna beams using switched parasitic elements.…”

Section: Introductionmentioning

confidence: 99%

Steerable Antenna Using Algorithm Based on Downhill Simplex Method

Abdullah

Kuwahara²

2011

PIER C

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Abstract-Electronically steerable passive array radiator(ESPAR) antennas are expected to gain prominence in the field of wireless communication, because they can be steered toward a desired signal and they can eliminate interference; in addition, they have a very simple architecture that has significantly low power consumption and are inexpensive to manufacture. In this paper, we proposed an ESPAR antenna that has fastest convergence time. The downhill simplex method is used to maximize the correlation coefficient between the received signal and the reference signal. The simulation results indicate that this antenna can be steered toward the desired signal if one signal is used; in addition, it can eliminate interference if two signals, namely, the desired signal and the interference are used by automatically varying the reactance values.

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“…For mobile communications, Vaughan [4] gave some examples of this technology to provide angle diversity as two parasitics on a mobile phone handset. The concept is to use a single active antenna element, connected to a radio transceiver, in a structure with one or several passive antenna elements, operating near resonance.…”

Section: Switched Parasitic Antennasmentioning

confidence: 99%

“…The parasitic antennas can be designed using monopoles on a ground plane [4], [8] or as parasitic patch antennas [9]. In this paper we consider the monopole on the ground plane for its omnidirectional properties.…”

Section: Switched Parasitic Antennasmentioning

confidence: 99%

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An antenna solution for MIMO channels: the switched parasitic antenna

Wennstrom

Svantesson²

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH859

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We investigate the switched parasitic antenna (SPA), which is a novel technique for electronically directing the radiation pattern, in a MIMO system. The correlation between the received signal modes are shown to be sufficiently low to yield a diversity gain. The capacity limit using the SPA is investigated for different SPA configurations and it is found that the capacity is comparable with an array antenna configuration in certain situations. Finally, a space time block coding scheme is used to evaluate the bit error rate of a MIMO-SPA system. It is found that the SPA requires a 5 dB higher SNR than an antenna array solution to achieve a BER= ¢ ¡ ¤ £ ¦ ¥ . However, the array antenna requires a radio transceiver for every antenna, as opposed to the SPA which uses only one transceiver.

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Switched parasitic elements for antenna diversity

Cited by 156 publications

References 13 publications

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.

Steerable Antenna Using Algorithm Based on Downhill Simplex Method

An antenna solution for MIMO channels: the switched parasitic antenna

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