Orbital angular momentum (OAM) based LDPC-coded deep-space optical communication

Power-efficient modulation schemes such as PPM are widely adopted in deep-space optical communications. In order to achieve multi-gigabit transmission, the usage of large number of time slots in PPM is needed that imposes stringent requirements on system implementation. In this paper, we propose the use of orbital angular momentum (OAM) based LDPC-coded PPM as a means to satisfy high-bandwidth demands of future interplanetary communications while keeping system cost and power consumption reasonably low. Because OAM eigenstates are orthogonal, an arbitrary number of bits/photon can be transmitted. The main challenge for OAM based deep-space communication represents the link between a spacecraft probe and the Earth station because in the presence of atmospheric turbulence the orthogonality between OAM states is not longer preserved. We show that the proposed OAM based LDPC-coded PPM can operate under strong turbulence regime when used in combination with receiver spatial diversity.

[1]  L. Andrews,et al.  Laser Beam Propagation Through Random Media , 1998 .

[2]  I.B. Djordjevic,et al.  Next Generation FEC for High-Capacity Communication in Optical Transport Networks , 2009, Journal of Lightwave Technology.

[3]  Ajay Dholakia,et al.  Reduced-complexity decoding of LDPC codes , 2005, IEEE Transactions on Communications.

[4]  Jon Hamkins,et al.  Deep-Space Optical Communications Downlink Budget: Modulation and Coding , 2003 .

[5]  Jon Hamkins,et al.  Coded Modulation for the Deep-Space Optical Channel: Serially Concatenated Pulse-Position Modulation , 2005 .

[6]  Ted Schmidt,et al.  Ultra high speed optical transmission using subcarrier-multiplexed four-dimensional LDPC-coded modulation. , 2010, Optics express.

[7]  B. Moision,et al.  Iterative Coded Pulse-Position-Modulation for Deep-Space Optical Communications , 2007, 2007 IEEE Information Theory Workshop.

[8]  Hamid Hemmati,et al.  Optical Modulation and Coding , 2006 .

[9]  Shu Lin,et al.  Error control coding : fundamentals and applications , 1983 .

[10]  C. Paterson,et al.  Atmospheric turbulence and orbital angular momentum of single photons for optical communication. , 2005, Physical review letters.

[11]  S. Barnett,et al.  Interferometric methods to measure orbital and spin, or the total angular momentum of a single photon. , 2004, Physical review letters.

[12]  M. Neifeld,et al.  Turbulence-induced channel crosstalk in an orbital angular momentum-multiplexed free-space optical link. , 2008, Applied optics.

[13]  Ross Saunders,et al.  Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks. , 2010, Optics express.

[14]  Marc P. C. Fossorier,et al.  Quasi-Cyclic Low-Density Parity-Check Codes From Circulant Permutation Matrices , 2004, IEEE Trans. Inf. Theory.

[15]  Lei Xu,et al.  Modified hybrid subcarrier/amplitude/ phase/polarization LDPC-coded modulation for 400 Gb/s optical transmission and beyond. , 2010, Optics express.

[16]  Zongwang Li,et al.  Efficient encoding of quasi-cyclic low-density parity-check codes , 2006, IEEE Trans. Commun..

[17]  Raymond C. Dymale,et al.  Holographic generation of complex fields with spatial light modulators: application to quantum key distribution. , 2008, Applied optics.

[18]  I. Djordjevic.  Adaptive Modulation and Coding for Free-Space Optical Channels , 2010, IEEE/OSA Journal of Optical Communications and Networking.

[19]  Hamid Hemmati.  Interplanetary Laser Communications , 2007 .

[20]  I.B. Djordjevic,et al.  Multidimensional LDPC-Coded Modulation for Beyond 400 Gb/s per Wavelength Transmission , 2009, IEEE Photonics Technology Letters.