Summary: A PSAM-Based Estimator of Noise and Fading Statistics for Optimum
Receivers of Free Space Optics Signals
, Hazem H. Refai*
, Peter G. LoPresti**
, Mohammed Atiquzzaman***
Electrical and Computer Engineering, University of Oklahoma, Tulsa, OK.
(Tel: 918 660-3243, e-mails: email@example.com, firstname.lastname@example.org)
Electrical Engineering Department, University of Tulsa, Tulsa, OK.
(Tel: 918 631-3274, e-mail: email@example.com)
Computer Science, University of Oklahoma, Norman, OK.
(Tel: 405 325-8077, email: firstname.lastname@example.org)
Incoherent receivers of Free Space Optical (FSO) signals have no knowledge of instantaneous channel state. Thus,
the receiver requires some information about the noise and fading statistics for a maximum likelihood (ML)-based
optimal detection. Using pilot-aided symbols, we develop a simple multi slot averaging (MSA) estimation technique to
approximate the values of parameters required at the incoherent detector. No channel state information (CSI) is available