[SLS-OPT] FW: [External] Optical Homodyne References

Braatz, Lena [USA] braatz_lena at bah.com
Mon Jun 8 16:55:44 UTC 2015

I am forwarding the message below to the CCSDS Optical Communications
Working Group on behalf of Bryan Robinson.




Lena Braatz


Office 434-973-4453

braatz_lena at bah.com

 <http://www.boozallen.com/> www.boozallen.com


From: Robinson, Bryan - 0667 - MITLL [mailto:brobinson at ll.mit.edu] 
Sent: Friday, June 05, 2015 8:20 AM
To: sls-opt at mailman.ccsds.org
Cc: Edwards, Bernard L. (GSFC-5600); Braatz, Lena [USA]
Subject: [External] Optical Homodyne References


At the last CCSDS optical communications working group telecon, there was a
request for references that describe the performance of the optical homodyne
channel and its capacity.  Here are some recommendations:


Example of BER and SNR calculation for the optical homodyne channel:


[1] J. R. Barry and E. A. Lee, "Performance of Coherent Optical Receivers",
Proc. IEEE, vol. 78, no. 8, pp. 1369-1394, 1990.


Channel capacity for homodyne channel:


The channel capacity for the AWGN channel was first derived b C. Shannon:

[2] C. E. Shannon, "A Mathematical Theory of Communication", Bell Syst.
Tech. J., vol 27, pp. 623-656, 1948.

The result is also commonly derived in modern information theory /
communications texts, such as:

[3] T. M. Cover and J. A. Thomas, "Elements of Information Theory", Wiley,

[4] J. G. Proakis and M. Salehi, "Digital Communications", McGraw-Hill,


The formulas for optical channel capacity that we have presented to the
CCSDS working group may be obtained by substituting the SNR for the optical
homodyne channel, shown in [1], into the formula for channel capacity for
the discrete-time AWGN channel shown in [2]-[4].


Bryan S. Robinson

Assistant Group Leader

Optical Communications Technology

MIT Lincoln Laboratory

781-981-7675 (office)

781-981-4129 (fax)


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