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Showing 1 to 5 of 5 for “"SOQPSK"”.
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A Hardware Implementation of a Coherent SOQPSK-TG Demodulator for FEC Applications
… phase shift keying, telemetry group version (SOQPSK-TG) for use in forward error correction (FEC) applications. Implementation details for data sequence detection, symbol timing synchronization, carrier phase synchronization, and block recovery are described. This decision-directed demodulator …
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Space-Time Coding with Offset Modulations
… QPSK (FQPSK-JR) and shaped offset QPSK (SOQPSK-TG) can be interpreted as both cross-correlated, trellis-coded quadrature modulation (XTCQM) and continuous phase modulation (CPM). Based on these representations, both modulations can be detected with near optimal bit error rate performance …
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Equalization Techniques For Multipath Mitigation in Aeronautical Telemetry
… two compatible offset QPSK waveforms (FQPSK and SOQPSK-TG) that constitute the ARTM Tier-1 waveforms. An adaptive version of the DF-MMSE equalizer is developed and applied to this application. In the presence of frequency selective multipath interference typically encountered in aeronautical …
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Reduced Complexity Detection Methods for Continuous Phase Modulation
… for a ternary CPM known as shaped offset QPSK (SOQPSK). Here, the performance of serially concatenated coded SOQPSK is studied along with uncoded systems. It is shown that the coded systems achieve large gains over uncoded systems. However, the design proposed herein achieves these gains with …
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Unitary Space-Time Transmit Diversity for Multiple Antenna Self-Interference Suppression
… of shaped offset quadrature phase shift keying (SOQPSK), hardware facility, and data throughput will be compared for each code. A realistic telemetry channel will be derived to increase accuracy of simulated results and conclusions.