For terrestrial free space optical (FSO) systems, we investigate the use of multipulse pulse position modulation
(MPPM), which has the advantage of bandwidth efficiency compared to the classical PPM. We first discuss
the upper-bound on the information transmission rate for the case of a Gaussian (turbulence-free) channel. We
next consider the channel coding issue for MPPM. We propose to use a simple binary convolutional code and
to perform iterative soft demodulation and channel decoding at the receiver. We study the performance of this
scheme by presenting some numerical results for the cases of Gaussian and weak-turbulence channels. We also
show that, in contrast to PPM, the bit-symbol mapping is an important point for MPPM, especially regarding
the proposed iterative receiver. In this view, we propose design rules for optimal bit-symbol mapping.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.