2 June 1989 Mitigation Of Scintillation For High Data Rate Communications Links
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Abstract
The performance of high data rate communications links can suffer degradation in scintillation due to intersymbol interference and antenna scattering loss. Adaptive equalization has proven to be very effective at mitigating the effects of intersymbol interference on high data rate links when sufficient signal power is available. The performance of an adaptive equalizer is limited, however, under severe scintillation conditions by the reduction in the received signal power due to scattering loss of the receiving antenna. Large antennas are typically utilized in high data rate communications links in order to achieve sufficient signal-to-noise ratios for reliable data demodulation. In scintillation, such large antennas suffer large losses as signal energy is scattered out of the narrow main beam of the antenna. Equivalently, this scattering loss results when the received signal is decorrelated across the face of the antenna aperture. This paper discusses the use of multiple small antennas to collect signal energy and an adaptive equalizer to coherently combine that energy. Such an equalized receiver can then utilize the spatial diversity of the scintillation to enhance performance. If the multiple antennas are physically separated, then spatial diversity can be utilized even in slow, flat fading conditions.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roger A. Dana, Roger A. Dana, James E. Owen, James E. Owen, } "Mitigation Of Scintillation For High Data Rate Communications Links", Proc. SPIE 1059, Space Sensing, Communications, and Networking, (2 June 1989); doi: 10.1117/12.951690; https://doi.org/10.1117/12.951690
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