关键词: 软件无线, 硬件通用化, 可编程器件, 高速数字系统, 电容去耦, 阻抗匹配

Abstract: In order to meet universality and flexibility of digital signal processing board, functional software design and software dynamic loadable for Software Communication Architecture(SCA) wireless communication system, this paper builds a module which is composed of programmable devices and suits for high-speed data processing and transmission. It uses AD/DA as IF signal’s Analog-to-Digital converter, uses Field Programmable Gate Array(FPGA) to realize high real-time processing which logic is simple, uses Digital Signal Processor(DSP) to achive complex signal processing and channel encode/decode. Furthermore, it uses General Purpose Processor(GPP) to satisfy need of complex and flexible control and management, as well as dynamically load DSP and FPGA. In the PCB module design stage, after considering the influence of the capacitor decoupling, impedance matching and signal crosstalk on the high-speed digital signal, it does the detailed design according to the signal transmission requirements. Simulation results show that the module can meet the application need, the method is feasible.

Key words: software defined radio, generation of hardware, programmable device, high-speed digital system, capacitor decoupling, impedance matching