International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / An improved performance smart diversity was invented to improve the signal performance in a
combined selective fading, Additive White Gaussian Noise (AWGN), Co-channel interference
(CCI) and Doppler shift environment such as the LEO satellite channel. This system is also
applicable to aeronautical and telemetry channels. Smart diversity is defined here as a
mechanism that selects at each moment the best branch in a n-branch diversity system based on
the error quality with no default branch and no prioritization. The predominant novelty of this
discovery is the introduction of multi level analog based Pseudo Error Detectors (PSED) in every
branch. One of the advantages of PSED is that it is a non redundant error detection system, with
no requirement for overhead and no need for additional valuable spectrum.
This research was motivated by problems in LEO satellite systems due to low orbit and high
relative speed with respect to the ground stations. The system is independent of the modulation
techniques and is applicable to both coherent and non-coherent detections. The results from
simulations using dynamic simulation techniques and hardware measurements over dynamic
channels show significant improvement of both the Bit Error Rate (BER) and the Block Error
Rate (BLER).
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/605382 |
| Date | 10 1900 |
| Creators | Haghdad, Mehdi, Feher, Kamilo |
| Contributors | University of California Davis, American SkySat, FQPSK Consortium – Digcom, Inc. |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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