一种可变插值比的脉冲成型数字滤波器FPGA设计  

A Variable Interpolating Ratio Pulse Shaped Filter Design Based on FPGA

作　　者：付文君[1] 姜景山[1] 王拴荣[1] 吕娈[1] 

机构地区：[1]中国科学院空间科学与应用研究中心

出　　处：《遥感技术与应用》2006年第5期445-449,共5页Remote Sensing Technology and Application

摘　　要：通信卫星的频分复用机制,对卫星通信系统的发送信号频谱成型提出了严格的要求。在宽带/窄带兼容的卫星通信系统中,发射信号的频谱带宽随不同速率的通信应用而改变。提出了一种脉冲成型基带数字滤波器的设计方法,将脉冲成型与插值滤波集成在一起,采用时变系数多相结构,可以在较宽的范围内灵活调整发送信号的码率与占用频谱带宽,满足了航空遥感数据实时传输系统的要求。脉冲成型滤波器设计针对FPGA的结构进行了优化,降低了硬件占用资源,达到了通信系统的设计性能指标。As frequency divided multiplex access is widely adopted in communication satellite system, strict frequency spectrum limits on modulator is mandated. In a wideband/narrowband compatible communication system, bandwidth of modulated signal is variable for different code rate applications. A time-varying interpolating pulse shaped FIR is designed to provide a large code rate dynamic range and an agile code rate adjustment required by airborne remote sensing data real-time transmission system in this paper. It is implemented and optimized for FPGA, which results in a low cost digital IF transmitter that meets the performance of the system designing.

关 键 词：脉冲成型滤波器 FPGA 时变系数多相插值滤波器 航空遥感 

分 类 号：TN713[电子电信—电路与系统]