BLIND ADAPTIVE EQUALIZER FOR MULTIPATH ENVIRONMENT IN LOW ELEVATION AERONAUTICAL TELEMETRY
AffiliationInstitute of Electronic Engineering, China Academy of Engineering Physics
KeywordsBlind Adaptive Equalizer
Constant Modulus Algorithm
Low Elevation Aeronautical Telemetry
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AbstractIt has been proved that multipath and timing-varying channels usually cause significant performance degradation, especially for low elevation scenario (0o~5o) in aeronautical telemetry. Channel models for various scenarios of the whole take-off process will be described in this paper. And we will present the experimental testing results to characterize the performance of a blind adaptive constant modulus algorithm (CMA) equalizer applied for PCM-FM receiver in low elevation aeronautical telemetry scenarios, including parking scenario, taxiing scenario, take-off scenario and far-flight scenario. The test results showed that the equalizer improved the signal quality and achieved a remarkable bit error rate (BER) performance gain in the multipath fading scenarios.