Title :
Implementation of DS/FH communication intermediate frequency π/4 DQPSK modulation based on FPGA
Author :
Guo-qing, Huang ; Tian-xi, Qiao
Author_Institution :
Dept. of Aeronaut. Electron. Eng., First Aeronaut. Inst. of Air Force, Xinyang, China
Abstract :
DS/FH communication intermediate frequency modulation module is designed based on FPGA, the module can be used in the hopping frequency system with the band of 200MHz, hopping speed of 1000hop/s. It can meet the intermediate frequency π/4 DQPSK modulation requirement. The performance of QPSK, π/4 DQPSK and π/2 DQPSK modulating is compared by MATLAB simulation, The simulation results show that the performance of π/4 DQPSK modulation format is optimization. And the principles, FPGA design, key technique in FPGA and hardware realization of the π/4 DQPSK modulation are given. The modulation rate of the designed intermediate frequency π/4 DQPSK modulation module reaches 2.5 Mbit/s on 10MHz clock rate, the modulating signal can demodulate with 0.025 low error rate in the signal-to-noise ratio -15dB interference environment.
Keywords :
code division multiple access; differential phase shift keying; field programmable gate arrays; frequency hop communication; interference (signal); optimisation; quadrature phase shift keying; spread spectrum communication; DQPSK modulation; DS/FH communication; FPGA; bandwidth 200 MHz; clock rate; hardware realization; hopping frequency system; interference environment; intermediate frequency modulation; low error rate; optimization; signal-to-noise ratio; Equations; Field programmable gate arrays; Frequency modulation; Interference; Mixers; Registers; π/4 DQPSK modulation; DS/FH communication; FPGA; modulation rate;
Conference_Titel :
Intelligent Control and Information Processing (ICICIP), 2011 2nd International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4577-0813-8
DOI :
10.1109/ICICIP.2011.6008238
