An ultraviolet laser communication system using frequency-shift keying modulation scheme

Abstract

A communication system based on an ultraviolet (UV) laser at 266 nm is presented to improve the communication distance. The pulse frequency-shift keying (FSK) modulation scheme is studied and improved in order to reduce the bit error rate (BER), and is put into practice on a field programmable gate array (FPGA). The mathematical models of the modulation and demodulation are established. A test platform is set up to measure the energy density and pulse response under different distances and receiver elevation angles. It is shown that the omnibearing communication can be realized, and the bit rate is limited to 12.5 Mbit/s. The BER is estimated to be less than 10⁻⁷ at distance of 300 m in line-of-sight (LOS) communication model and to be less than 10⁻⁶ at distance of 80 m in non-line-of-sight (NLOS) communication model.

Keywords

Light Emit Diode / Field Programmable Gate Array / Elevation Angle / Semiconductor Optical Amplifier / Pulse Response

References

[1] SunsteinD M. A Scatter Communications Link at Ultraviolet Frequencies, 1968,

[2] LuettgenM R, ShapiroJ H, ReillyD M. Journal of Optical Society of America A, 1991, 8: 1964

[3] NoshadM, Brandt-PearceM. NLOS UV Communication Systems Using Spectral Amplitude Coding, 2011 IEEE Globecom Workshops, 2011, 843

[4] ShawG A, NischanM, IyengarM, KaushikS, GriffinM K. Proc. SPIE, 2000, 4126: 83

[5] LuoP, ZhangM, HanD, LiQ. Optics Express, 2012, 20: 23489

[6] YoungD P, BrewerJ, ChangJ, ChouT N, KvamJ, PughM. Diffuse Mid-UV Communication in the Presence of Obscurants, Asilomar Conference on Signals, Systems and Computers, 2012, 1061

[7] ShenN-f, ZhangH-m, YaoM-y. Journal of Optoelectronics·Laser, 2014, 25: 1900

[8] HanD, LiuY, ZhangK, LuoP, ZhangM. Optics Express, 2012, 20: 15833

[9] YeW-l, ZhengC-t, ZhangH-w, WuX-k. Journal of Optoelectronics·Laser, 2013, 24: 1500

[10] http://www.hamamatsu.com/jp/en/product/category/3100/3001/R7154/index.html

[11] KennedyG, DavisB. Electronic Communication Systems, 1993, Ed.4Singapore, McGraw-Hill

[12] DingY, TongS F. A Simplified NLOS UV Communication Model, International Conference on Optoelectronics and Microelectronics, 2012, 250

This work has been supported by the National Natural Science Foundation of China (No.11075226), and the Natural Science Foundation of Chongqing (No.cstc2014jcyjA90010).