[1] M. Srinivasan, J. Hamkins, B. Madden-Woods et al.. Laboratory characterization of silicon avalanche photodiodes (APDs) for pulse-position modulation (PPM) detection [R]. IPN Progress Report, 42-146, 2001. 3～5

[2] Da-shan Shiu, Joseph M. Kahn. Differential pulse-position modulation for power-efficient optical communication [J]. IEEE Trans. on Communications, 1999, 47(8):1201～1210

[3] Robert M. Gagliardi, Sherman Karp. Optical Communications [M]. New York: A Wiley Inter-science Publication John Wiley & Sons, 1976. 167～180

[5] David L. Donoho. De-noising by soft-thresholding [J]. IEEE Transactions on Information Theory, 1995, 41(3):613～627