Title :
Serially concatenated codes for aeronautical telemetry
Author :
Damodaran, Kanagaraj ; Perrins, Erik
Author_Institution :
Dept. of Electr. Eng.&Comput. Sci., Univ. of Kansas, Lawrence, KS
Abstract :
We develop bandwidth-efficient serially concatenated coded (SCC) continuous phase modulation (CPM) techniques for aeronautical telemetry. The concatenated code consists of an inner and an outer code, separated by an interleaver in most configurations, and is decoded using relatively simple near-optimum iterative decoding algorithms. CPM waveforms such as shaped-offset quadrature phase shift keying (SOQPSK) and pulse code modulation/frequency modulation (PCM/FM), which are currently used in military satellite and aeronautical telemetry standards, can be viewed as inner codes due to their recursive nature. For the outer codes, we apply turbo-product codes (TPC) and serially concatenated convolutional codes (SCCC) because of their large coding gains, high coding rates, and because their decoding algorithms are readily implemented. High-rate codes are of special interest in aeronautical telemetry applications due to recent reductions in available spectrum and ever-increasing demands on data rates. We evaluate the proposed coding schemes with a large set of numerical simulation results and make a number of recommendations based on these results.
Keywords :
concatenated codes; continuous phase modulation; iterative decoding; pulse code modulation; pulse frequency modulation; quadrature phase shift keying; telemetry; turbo codes; aeronautical telemetry; bandwidth-efficient serially concatenated coded continuous phase modulation; iterative decoding algorithms; pulse code modulation; pulse frequency modulation; serially concatenated codes; shaped-offset quadrature phase shift keying; turbo-product codes; Concatenated codes; Continuous phase modulation; Frequency modulation; Iterative algorithms; Iterative decoding; Phase modulation; Pulse modulation; Pulse shaping methods; Quadrature phase shift keying; Telemetry;
Conference_Titel :
Military Communications Conference, 2008. MILCOM 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2676-8
Electronic_ISBN :
978-1-4244-2677-5
DOI :
10.1109/MILCOM.2008.4753228