DocumentCode :
1499849
Title :
Turbo-Coded APSK for aeronautical telemetry
Author :
Shaw, Christopher ; Rice, Michael
Author_Institution :
Brigham Young Univ., Provo, UT, USA
Volume :
25
Issue :
4
fYear :
2010
fDate :
4/1/2010 12:00:00 AM
Firstpage :
37
Lastpage :
43
Abstract :
The performance of turbo-coded Amplitude-Phase Shift Keying (APSK) in an aeronautical telemetry system with a non-linear power amplifier is investigated. The AM/AM curves for four L-band power amplifiers are modeled and used to simulate the performance the turbo-coded APSK system over a non-linear channel, Spectral efficiency and bit error rate performance as a function of back-off are quantified and compared with a system based on the existing aeronautical telemetry standard using uncoded SOQPSK. The results show that the -50 dBc bandwidth can be matched with 2.5 to 4.1 dB of back-off, the -60dBc bandwidth can be matched with 4.3 to 6.6 dB of back-off, and the 99%. bandwidth can be matched with 0.8 to 1.6 dB of back-off. The bit error rate results show that each power amplifier has an optimal back-off and that this back-off is 3 dB for the four amplifiers used in this study. When put together, this system is capable of outperforming an uncoded system based on SOQPSK by matching (or exceeding) the detection efficiency while simultaneously achieving a spectral efficiency in excess of three times that of SOQPSK.
Keywords :
amplitude shift keying; error statistics; phase shift keying; power amplifiers; telemetry; turbo codes; AM/AM curves; L-band power amplifiers; aeronautical telemetry; bit error rate performance; bit error rate results; detection efficiency; nonlinear channel; nonlinear power amplifier; spectral efficiency; turbo-coded APSK system; turbo-coded amplitude-phase shift keying; uncoded SOQPSK; Bit error rate; Continuous phase modulation; Power amplifiers; Pulse modulation; Quadrature phase shift keying; Radio frequency; Radiofrequency amplifiers; Telemetry; Testing; Turbo codes;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems Magazine, IEEE
Publisher :
ieee
ISSN :
0885-8985
Type :
jour
DOI :
10.1109/MAES.2010.5467655
Filename :
5467655
Link To Document :
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