PILOT SEQUENCE DESIGN FOR TELEMETRY WAVEFORMS IN MULTI-ANTENNA TRANSMITTERS

Abstract

In multi-antenna systems, accurate Channel State Information estimation is crucial for reliable data decoding. In aeronautical telemetry, the spatial separation of antennas onboard aircraft, which can span several meters, introduces non negligible differential delays between received signals at receiver side which degrades channel estimation, thereby impacting the communication performance. To address this issue, we propose to use Space Time Coding to generate pilot sequences that mitigate differential delay degradation. Thus leading to improved receiver robustness in multi- antenna aircraft telemetry systems. Complete communication system simulation using AWGN channel showcases gains in CSI estimation up to 6dB without any increase in pilot sequence size nor in computational complexity.