关键词: 希尔伯特变换, 单边带调制, 现场可编程门阵列

Abstract:

Single-sideband modulation has many advantages such as small bandwidth, low\|power, etc in carrier modulation techniques.And because of the difficulty of realization, it has not been widely used today.We study the method of the single-sideband modulation based on Hilbert transformation, and introduces the theoretical background and FPGA(Field Programmable Gate Arrays) implementation of the SSB(Single Sideband Modulation) system. The simulation results of the Matlab model demonstrate that 100 order FIR(Finite Impulse Response filter) finite impulse response filter could approximate the ideal Hilbert convertor. The SSB system based on FPGA was simulated by Modelsim. And the simulation got an ideal single-sideband modulation waveform. The entire SSB system only takes up 15% of the FPGA resources,reducing the costs effectively. And the system was used in audio directional loudspeaker practically.

Key words: Hilbert transformation, single sideband modulation(SSB), field programmable gate arrays(FPGA)