Performance analysis of pulse position modulation-based hybrid technique for cellular backhaul free-space optical link

Pritam Keshari Sahoo; Yogendra K. Prajapati; Rajeev Tripathi

doi:10.1117/1.OE.58.1.016119

31 January 2019 Performance analysis of pulse position modulation-based hybrid technique for cellular backhaul free-space optical link

Pritam Keshari Sahoo, Yogendra K. Prajapati, Rajeev Tripathi

Author Affiliations +

Optical Engineering, Vol. 58, Issue 1, 016119 (January 2019). https://doi.org/10.1117/1.OE.58.1.016119

Abstract

We investigate the performance of half-cosine pulse-shaped hybrid pulse position modulation-orthogonal frequency division multiplexing (HC-PPM-OFDM) under weak (i.e., log-normal) and strong (i.e., gamma–gamma) turbulence free-space optical channel. Joint impact of frequency and time offset on the performance parameters such as intercarrier interference, a symbol to interference ratio, and bit-error rate are also investigated. This research aims to improve the spectral efficiency performance of traditional PPM through the proposed hybrid technique. Further, the proposed HC-PPM-OFDM technique is compared with pulse position modulation-minimum shift keying (PPM-MSK), PPM, and hybrid PPM-OFDM. Obtained results show comprehensive improvement in the performance parameters under both weak and strong atmospheric turbulences. In addition to the above results, the upper-bound channel capacity expression is derived for log-normal as well as gamma–gamma turbulence channel models. Obtained results reveal that the proposed modulation technique outperforms PPM and PPM-MSK techniques under all turbulence conditions at a marginal cost of power penalty.

Citation Download Citation

Pritam Keshari Sahoo, Yogendra K. Prajapati, and Rajeev Tripathi "Performance analysis of pulse position modulation-based hybrid technique for cellular backhaul free-space optical link," Optical Engineering 58(1), 016119 (31 January 2019). https://doi.org/10.1117/1.OE.58.1.016119

Received: 5 October 2018; Accepted: 9 January 2019; Published: 31 January 2019

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

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