SPC-APPM coded modulation for deep-space optical communications

Abstract

A coded modulation scheme for deep-space optical communications is proposed, which is composed of an outer single-parity-check (SPC)-based product code, an interleaver, a bit-accumulator and a pulse-position modulation (PPM). It is referred as SPC-APPM code, which is decoded with an iterative demodulator-decoder using standard turbo-decoding techniques. Investigations show that the scheme has the advantages of low encoding and decoding complexities, good performance and flexible code rate for all rates above 1/2. Meanwhile, simulation results demonstrate that the SPC-APPM provides the performance similar to the low-density parity-check-APPM (LDPC-APPM), superior to the LDPC-PPM and product accumulate code-PPM (PA-PPM), although inferior to serially concatenated PPM (SCPPM). At the bit error rate (BER) of 10⁻⁵, the performance of SPC-APPM is about 0.7 dB better than LDPC-PPM and 1.2 dB better than PA-PPM.

Keywords

Outer Iteration / LDPC Code / Code Length / Convolutional Code / Extrinsic Information

References

[1] HuangA.-p., FanY.-y.. Optoelectronics Let ters, 2009, 5: 376

[2] NguyenT. T., LampeL.. IEEE Transactions on Communications, 2010, 58: 1036

[3] HuH., WangH.-x., LiuM.. Journal of Optoelectronics Laser, 2011, 22: 858

[4] BaruaB.. Analysis of the Performance of a LDPC Coded FSO System with Q-ary Pulse-Position Modulation3rd International Conference on Computer Research and Development, 2011, 1: 339

[5] WangZ.-p., ChenL., CaoZ.-z., DongZ.. Journal of Optoelectronics Laser, 2010, 21: 380

[6] B. Moision and J. Hamkins, Coded Modulation for the Deep-Space Optical Channel: Serially Concatenated Pulse-Position Modulation, Pasadena, JPL Interplanetary Network Progress Report 42-161, 1 (2005).

[7] BarsoumM. F., MoisionB.. IEEE Transactions on Communications, 2010, 58: 3573

[8] TanY., GuoJ.-z., AiY.. IEEE Photonics Technology Letters, 2008, 20: 372

[9] LiJ., NarayananK. R., GeorghiadesC. N.. IEEE Transactions on Information Theory, 2004, 50: 31

[10] LiJ., KurtasE., NarayananK. R., GeorghiadesC. N.. IEEE Transactions on Magnetics, 2001, 37: 1932

[11] GuoJ., TanY.. Optoelectronics Letters, 2011, 7: 147

[12] XiaoM., WangL., XuW.. Advantages of Product Accumulate Codes over Regular LDPC Codes under AWGN Channel8th International Conference on Signal Processing, 2006, 3: 2064

[13] TanY., GuoJ.-Z., AiY.. IEEE Photonics Technology Letters, 2009, 21: 67

[14] RobertsonP., VillebrunE., HocherP.. A Comparison of Optimal and Sub-Optimal MAP Decoding Algorithms Operating in the Log DomainIEEE International Conference on Communications, 1995, 2: 1009

[15] AshikhminA., KramerG., BrinkS. T.. IEEE Transactions on Information Theory, 2004, 50: 2657