Title :
Performance of low-density parity-check coded modulation
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
This paper reports the performance of a family of nine accumulate-repeat-4-jagged-accumulate (AR4JA) low-density parity-check (LDPC) codes [4] when used in conjunction with binary phase-shift-keying (BPSK), quadrature PSK (QPSK), 8-PSK, 16-ary amplitude PSK (16-APSK), and 32-APSK. We also report the performance under various mappings of bits to modulation symbols, hard decision decoding, log-likelihood ratio (LLR) approximations, and decoder iterations. One of the simple and well-performing LLR approximations can be expressed in a general equation that applies to all of the modulation types.
Keywords :
amplitude modulation; approximation theory; binary codes; decoding; parity check codes; quadrature phase shift keying; 32-APSK; 6-APSK; 6-ary amplitude PSK; 8-PSK; AR4JA; BPSK; LDPC codes; QPSK; accumulate-repeat-4-jagged-accumulate code; binary phase-shift-keying; decoder iteration; hard decision decoding; log-likelihood ratio approximation; low-density parity-check coded modulation; modulation symbol; quadrature PSK; Amplitude modulation; Binary phase shift keying; Equations; Iterative decoding; Modulation coding; Parity check codes; Phase modulation; Phase shift keying; Quadrature phase shift keying; Space missions;
Conference_Titel :
Aerospace Conference, 2010 IEEE
Conference_Location :
Big Sky, MT
Print_ISBN :
978-1-4244-3887-7
Electronic_ISBN :
1095-323X
DOI :
10.1109/AERO.2010.5446927
