Title :
Research on positive and negative slope LFM signal joint coding communication technology based on fractional Fourier transform
Author :
Chen, Yun ; Wang, Yilin ; Mei, Jidan ; Cai, Ping
Author_Institution :
Nat. Lab. of Underwater Acoust. Technol., Harbin Eng. Univ., Harbin, China
Abstract :
In order to improve communication rate and frequency band efficiency of the underwater acoustic (UWA) communication system, a new method using positive and negative slope LFM signal joint coding based on fractional Fourier transform (FRFT) was presented in this paper. And this scheme had strong anti-noise performance and good robustness. Under the premise of not occupying additional system frequency band resource, the slope of LFM signal was used as coding information, and the fractional Fourier transform was used as demodulation method at receiving end. The Rake receiver was proposed to suppress the inter-symbol interference (ISI) arising from multipath effect of the UWA channel. Through the simulation and water pool experiment, the communication rate can reach up to 1600 bit/s.
Keywords :
Fourier transforms; demodulation; encoding; interference suppression; intersymbol interference; radio receivers; underwater acoustic communication; wireless channels; FRFT; ISI; Rake receiver; UWA channel; UWA communication system; antinoise performance; bit rate 1600 bit/s; demodulation method; fractional Fourier transform; frequency band efficiency; intersymbol interference suppression; multipath effect; negative slope LFM signal joint coding communication technology; positive negative slope LFM signal joint coding; underwater acoustic communication system; Robustness; Fractional Fourier Transform (FRFT); Rake receiver; inter-symbol interference (ISI); underwater acoustic communication (UWA);
Conference_Titel :
Advanced Computer Control (ICACC), 2011 3rd International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-8809-4
Electronic_ISBN :
978-1-4244-8810-0
DOI :
10.1109/ICACC.2011.6016432
