基于FPGA双通道DS-QPSK发射基带设计

Dual-channel DS-QPSK Base-band Design Based on FPGA

双通道DS-QPSK调制方式可以提高带宽的利用率,在卫星低速率语音通信应用中,利用两个独立的通道,可以解决同时传输语音数据和信令控制数据。研究了基于FPGA和AD 9857的双通道数字扩频基带硬件和软件的实现方法,并通过X ilinx FPGA芯片和AD 9857芯片建立的硬件系统进行系统验证,给出了其在M ode ls im环境下的仿真结果,目前应用到卫星通信语音发射扩频基带的设计实验中。

The dual-channel DS-QPSK modulation can improve the utility of the bandwidth, for the low rate satellite communication application, the data of voice and control signaling can be transmitted simultaneously in those independent channels. This paper studied the project design of DS_ QPSK based on the FPGA and AD9857 implement and completed successfully the verification in Xilinx FPGA chips and AD9857 chips, finally, the simulation with ModelSim testified the design feasibility and applied to voice spread spectrum transmitter device.