Improved Channel Sounding using ZC Sequences in Aeronautical Telemetry Multipath Environments

Sliding correlators are widely used in the measurement of channel characteristics, but the large delay fading in the aeronautical telemetry channel severely limit the dynamic range of the measurement system. In this paper, we propose a sliding correlator based on Zadoff-Chu (ZC) sequences, and conduct a system analysis based on the measured aeronautical telemetry channel for the first time. Different from known analysis methods, we give the analytical expression of each interference component from the frequency domain, and analyze their impact on the measurement performance through simulation. Simulation results show that the proposed sliding correlator has an obvious suppression for the additive noise interference. More importantly, when the normalized sliding factor is greater than 2 and the SNR is greater than 10dB, the measurement performance is at least 2dB higher than the traditional sliding correlator, which provides a valuable reference for the design of the measurement system in aeronautical telemetry envrionments.