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本帖最后由 spwedasd 于 2014-4-12 00:49 编辑
Digital Processing
Optical Transmission and Coherent Receiving Techniques,
2014 by Taylor & Francis Group, LLC
Le Nguyen Binh
Optical communication technology has been extensively developed over the
last 50 years, since the proposed idea by Kao and Hockham [1]. However, only
during the last 15 years have the concepts of communication foundation, that
is, the modulation and demodulation techniques, been applied. This is possible
due to processing signals using real and imaginary components in the
baseband in the digital domain. The baseband signals can be recovered from
the optical passband region using polarization and phase diversity techniques,
as well as technology that was developed in the mid-1980s.
The principal thrust in the current technique and technology differs distinctively
in the processing of baseband signals in the discrete/sampled digital
domain with the aid of ultra-high-speed digital signal processors and
analog-to-digital and digital-to-analog converters. Hence, algorithms are
required for such digital processing systems.
Over the years, we have also witnessed intensive development of digital
signal processing algorithms for receivers in wireless transceivers, and especially
in band-limited transmission lines to support high-speed data communications
[2] for the Internet in its early development phase.
We have now witnessed applications and further development of the algorithms
from wireless and digital modems to signal processing in lightwave
coherent systems and networks. This book is written to introduce this new
and important development direction of optical communication technology.
Currently, many research groups and equipment manufacturers are attempting
to produce real-time processors for practical deployment of these DSPbased
coherent transmission systems. Thus, in the near future, there will be
new and significant expansion of this technology due to demands for more
effective and memory-efficient algorithms in real time. Therefore, the author
believes that there will be new books addressing these coming techniques
and technological developments. |
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发表于 2014-4-10 15:08:59
发表于 2014-4-10 19:47:48
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