Binary shaping for low-duty-cycle communications: a useful alternative to PPM

Richard J. Barron

doi:10.1117/12.543011

16 June 2004 Binary shaping for low-duty-cycle communications: a useful alternative to PPM

Richard J. Barron

Proceedings Volume 5338, Free-Space Laser Communication Technologies XVI; (2004) https://doi.org/10.1117/12.543011
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

We develop a coding method called binary shaping that generates a binary channel input of arbitrary duty-cycle with Bernoulli statistics, which is useful for laser communications using generalized on-off keying. We couple binary shaping with a serially concatenated turbo code for forward error correction, and show by simulation that the performance of this scheme with iterative decoding approaches the capacity of generalized on-off keying on the Poisson channel for medium duty cycles, significantly exceeding the performance of pulse-position modulation (PPM) in this regime. Analogous to trellis shaping for the AWGN channel, binary trellis shaping utilizes a convolutional shaping code to which we apply the Viterbi algorithm at the encoder to minimize Hamming weight. We show how low-duty-cycle communications is a special case of information embedding and discuss how binary shaping relates to information embedding methods.

Citation Download Citation

Richard J. Barron "Binary shaping for low-duty-cycle communications: a useful alternative to PPM", Proc. SPIE 5338, Free-Space Laser Communication Technologies XVI, (16 June 2004); https://doi.org/10.1117/12.543011

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