Conference proceeding
BER performance of MIMO diffuse free-space optical systems
Proceedings of SPIE - The International Society for Optical Engineering, v 7199, pp 71990M-71990M-9
24 Feb 2009
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this paper, Multiple-Input Multiple-Output (MIMO) technology is applied to diffuse free-space optical (DFSO)
links. We compare the theoretical BER performance of simulated MIMO and Single-Input Single-output (SISO)
optical links in an indoor office environment. An iterative site-based simulation tool is used to determine the
impulse response of wireless infrared (IR) channels for specified locations within a room. For our purposes, we
use a MIMO 4x4 orthogonal space-time block code. Using this scheme a BER calculation is done based on
received signal power and the corresponding channel gains. By setting a BER threshold within which the system
can operate, we are able to see the coverage area provided by MIMO and SISO DFSO system architecture.
We simulate a stationary transmitter while the receiver is moved through 735 different locations in the room,
resulting in a BER contour plot of the system for a specified room. Simulation results show that by using 4-element arrays at both ends of the link, along with space-time block coding techniques, allows the effective coverage area to be increased by approximately 4 times. Also, when operating with a BER threshold of 10-3, the MIMO architecture requires up to 15dB less signal power than the SISO architecture to remain below the threshold. An optical testbed is used to begin hardware validation of our theory, both with and without optical orthogonal frequency division multiplexing (OFDM) techniques. We provide initial measurement results for the proposed optical system.
Metrics
6 Record Views
Details
- Title
- BER performance of MIMO diffuse free-space optical systems
- Creators
- Douglas S Pfeil - Drexel Univ. (United States)Sai Vamsidhar - Drexel Univ. (United States)Timothy P Kurzweg - Drexel Univ. (United States)Kapil R Dandekar - Drexel Univ. (United States)
- Publication Details
- Proceedings of SPIE - The International Society for Optical Engineering, v 7199, pp 71990M-71990M-9
- Publisher
- SPIE
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000285044900017
- Scopus ID
- 2-s2.0-65649108179
- Other Identifier
- 991014878180004721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Optics
- Physics, Applied
- Telecommunications