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Development of 4x4 annular ring array based digital transceivers for long distance UWB wireless communications
Conference proceeding

Development of 4x4 annular ring array based digital transceivers for long distance UWB wireless communications

K. Srinivasan, P. Iyengar, L. Zhou, A. S. Daryoush and IEEE
2008 IEEE RADIO AND WIRELESS SYMPOSIUM, VOLS 1 AND 2, pp 479-482
01 Jan 2008
DOI: https://doi.org/10.1109/RWS.2008.4463533

Abstract

Engineering Engineering, Electrical & Electronic Science & Technology Technology Telecommunications
This paper presents design and realization of subcomponents for a prototype 4x4 ultra wide band (UWB) communication device. The sub-components are four quadrature phase shift keying (QPSK) modulated direct digital transceivers using QPSK modulation scheme operating on the lowest channel of multi-band orthogonal frequency division multiplexing OFDM (MB-OFDM) approach over 3.168- 3.696 GHz. InGaP/GaAs BET based integrated circuit (IC) realization of the receiver consist of a low noise amplifier (LNA) with a stable gain of 26 dB and a noise figure of 1.5 dB, a Gilbert-cell mixer (GCM) with a conversion loss of 4 dB, and a poly-phase circuit to provide four 0, +/-90 and 180 degrees phase shifted signals for the GCM. A similar up-conversion unit is considered where the LNA may functions as a gain block The power budget and dynamic range requirements for a radio link distance up to 100m are analyzed in various faded environments to provide a minimum bit error rate of 10(-5). A 4x4 circularly polarized (CP) antenna array with a directivity gain of 20dBi is developed to compensate for the link power loss.

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Engineering, Electrical & Electronic
Telecommunications
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