Performance Analysis of FQPSK and SOQPSK in Aeronautical Telemetry Frequency Selective Multipath Channel

• Main Author: Dang, Xiaoyu
• Other Authors: Rice, Michael
• Language: en_US
• Published: International Foundation for Telemetering 2004
• Subjects: BER (Bit Error Rate); Multipath; Feher-patented QPSK; Shaped Offset QPSK
• Online Access: http://hdl.handle.net/10150/605801; http://arizona.openrepository.com/arizona/handle/10150/605801

International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California === The impact of frequency selective multipath fading on the bit error rate performance of ARTM Tier-1 waveforms (FQPSK and SOQPSK) is derived and analyzed. In the presence of a strong specular reflection with relative magnitude |Γ1|, the ARTM Tier-1 waveforms suffer a loss in performance of (1 - |Γ1)^(-4√(|Γ1|)) for |Γ1| < 0:5 and a relatively high error floor at approximately 10^(-2) for |Γ1| ≥ 0.5. The ARTM Tier-1 waveforms possess twice the spectral efficiency of PCM/FM, but exhibit a greater loss and higher error floors than PCM/FM for the same multipath conditions and signal-to-noise ratio.