摘要
传统的π/4四相相对相移键控(π/4-DQPSK)调制器多采用模拟元件构建系统,易受环境因素影响、灵活性也较差。因此需要设计一个以数字信号处理为核心,开放性、灵活性较强的系统。系统采用软件无线电设计方法,在现场可编程门阵列(FPGA)上实现时输入码率1Mbps、中频为2MHz的π/4-DQPSK调制。结果表明,该方法可产生正确的调制波形。系统模块多用IP软核实现,易于修改和实现。
The traditional π/4 - DQPSK modulator made of analog components is vulnerable and inflexible, so it needs to design a open flexible system based on Software Radio. This system elaborates the whole modulation process on FPGA. The bit rate is 1Mbps, carrier frequency is 2MHz. The results show that the method can produce the correct modulation waveform. The system completes based on IP core, which makes it easy to be modified and realized.
出处
《微处理机》
2012年第4期12-15,共4页
Microprocessors
