Coded multipulse modulation in optical communication systems

An optical communication system using coded multipulse position modulation is described. The position of the pulses in each signalling interval are derived from general binary constant weight codes. The combined coding and modulation of multiple pulses provides a minimum distance between any two signaling frames. Photon counting is used at the receiving end for noiseless optical channel in which only quantum noise exists. For noisy optical channel with avalanche photodetector, threshold demodulation is used in which an optical pulse is considered present in a slot where the photoelectron count exceeds a given threshold. It is shown that this multipulse system gives better performance than the conventional single pulse system. The performance analysis can be applied to and binary constant weight code since only the general parameters of length, minimum distance, and weight of the code are needed. >

[1]  J. Conradi,et al.  The distribution of gains in uniformly multiplying avalanche photodiodes: Experimental , 1972 .

[2]  R. Mcintyre.  The distribution of gains in uniformly multiplying avalanche photodiodes: Theory , 1972 .

[3]  J. Pierce,et al.  Optical Channels: Practical Limits with Photon Counting , 1978, IEEE Trans. Commun..

[4]  J. L. Massey,et al.  Capacity, Cutoff Rate, and Coding for a Direct-Detection Optical Channel , 1981, IEEE Trans. Commun..

[5]  N. J. A. Sloane,et al.  A new table of constant weight codes , 1990, IEEE Trans. Inf. Theory.

[6]  Ian F. Blake,et al.  Performance of multitone FFH/MFSK systems in the presence of jamming , 1989, IEEE Trans. Inf. Theory.

[7]  Robert J. McEliece,et al.  Practical codes for photon communication , 1981, IEEE Trans. Inf. Theory.

[8]  Dariush Divsalar,et al.  PPM Performance for Reed-Solomon Decoding Over an Optical-RF Relay Link , 1984, IEEE Trans. Commun..

[9]  R. Gagliardi,et al.  Block encoding and decoding for the optical PPM channel , 1982, IEEE Trans. Inf. Theory.

[10]  Guillermo E. Atkin,et al.  An efficient modulation/coding scheme for MFSK systems on bandwidth constrained channels , 1989, IEEE J. Sel. Areas Commun..

[11]  G. E. Atkin,et al.  Performance analysis of coded optical PPM system using direct and coherent detection , 1990 .

[12]  Jack K. Wolf.  On Comparing N-ary Systems , 1962 .

[13]  Xiaoli Sun,et al.  Gaussian approximation versus nearly exact performance analysis of optical communication systems with PPM signaling and APD receivers , 1988, IEEE Trans. Commun..

[14]  J. W. Modestino,et al.  Coding Options for the Degraded Optical PPM Channel , 1984, MILCOM 1984 - IEEE Military Communications Conference.

[15]  N. J. A. Sloane,et al.  Bounds for binary codes of length less than 25 , 1978, IEEE Trans. Inf. Theory.