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Impact of fractional bandwidth on the bit error rate of a beamforming system | IEEE Conference Publication | IEEE Xplore

Impact of fractional bandwidth on the bit error rate of a beamforming system


Abstract:

Beamforming is used to correct for phase or time delay in signals received at multiple antennas in mm-wave receivers. The correction is meant to improve the signal-to-noi...Show More

Abstract:

Beamforming is used to correct for phase or time delay in signals received at multiple antennas in mm-wave receivers. The correction is meant to improve the signal-to-noise ratio and the bit-error-rate (BER) by filtering away the effect of noise and interferences. Typically, phase-corrected beamformers are used for lower fractional bandwidth applications, where the symbols are well spaced. In wideband beamforming systems, the fractional bandwidth is high which means that symbol rate is more than 20% of the carrier frequency. This higher fractional bandwidth increases the inter-symbol interference (ISI) which, in turn, compromises the BER and therefore limits the phase-array performance. The focus of this paper is to quantify these trends and derive antenna array system design rules for area-efficient, on-chip implementations. One such rule is that for a fractional bandwidth greater than 1/6, the uniform-linear-array (ULA) size should be less than three antennas which sets an upper-bound for the best achievable system performance. Our rules account for antenna grouping in phase-array systems and quantify the impact of group time-delay corrections on the system BER.
Date of Conference: 16-19 October 2016
Date Added to IEEE Xplore: 06 March 2017
ISBN Information:
Electronic ISSN: 1558-3899
Conference Location: Abu Dhabi, United Arab Emirates

References

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