Toward an optimal combined FSO/RF system via an adaptive bit rate control

Hassan Moradi; Maryam Falahpour; Hazem H. Refai; Peter G. LoPresti; Mohammed Atiquzzaman

doi:10.1117/12.844903

26 February 2010 Toward an optimal combined FSO/RF system via an adaptive bit rate control

Hassan Moradi; Maryam Falahpour; Hazem H. Refai; Peter G. LoPresti; Mohammed Atiquzzaman

Author Affiliations +

Proceedings Volume 7587, Free-Space Laser Communication Technologies XXII; 75870X (2010) https://doi.org/10.1117/12.844903
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

In hybrid FSO/RF (Free Space Optics/Radio Frequency) systems, the FSO link is the primary link while the RF link is the secondary (backup) link. In current hybrid systems, once the FSO signal to noise ratio (SNR) decreases above a preset threshold, the system switches from FSO to RF to maintain the communication connection. But this scenario does not provide maximum utilization of the available bandwidth in terms of spectrum efficiency. This paper proposes an adaptive FSO bit rate algorithm to maintain communication using the FSO link as long as its bit rate is greater than that can be offered by the RF, thus requiring no switching to the secondary link. The system switches to the secondary link if and only if the FSO bit rate while maintaining the system bit error rate (BER) drops below the bit rate that can be achieved by the RF link. This paper shows the dependence of FSO bit error rate on channel bit rate using analysis and computer simulation. Furthermore, computer simulation is carried out and the results confirm the algorithm's effectiveness on maintaining higher bit rate communication connection using FSO link. Hence, the overall system performance achieves better throughput.

Citation Download Citation

Hassan Moradi, Hassan Moradi, Maryam Falahpour, Maryam Falahpour, Hazem H. Refai, Hazem H. Refai, Peter G. LoPresti, Peter G. LoPresti, Mohammed Atiquzzaman, Mohammed Atiquzzaman, } "Toward an optimal combined FSO/RF system via an adaptive bit rate control", Proc. SPIE 7587, Free-Space Laser Communication Technologies XXII, 75870X (26 February 2010); doi: 10.1117/12.844903; https://doi.org/10.1117/12.844903

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years