| 一种可变插值比的脉冲成型数字滤波器FPGA 设计 |
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| 引用本文： | 付文君,姜景山,王拴荣,吕娈.一种可变插值比的脉冲成型数字滤波器FPGA 设计[J].遥感技术与应用,2006,21(5):445-449. |
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| 作者姓名： | 付文君 姜景山 王拴荣 吕娈 |
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| 作者单位： | ( 1. 中国科学院空间科学与应用研究中心, 北京 100080; 2. 中国科学院研究生院, 北京 100080) |
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| 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。
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| 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 |
| 文章编号： | 1004-0323（2006）05-0445-05 |
| 收稿时间： | 2006-01-15 |
| 修稿时间： | 2006-03-21 |
A Variable Interpolating Ratio Pulse Shaped Filter Design Based on FPGA |
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| FU Wen-jun,JIANG Jing-shan,WANG Shuan-rong,Lü Luan.A Variable Interpolating Ratio Pulse Shaped Filter Design Based on FPGA[J].Remote Sensing Technology and Application,2006,21(5):445-449. |
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| Authors: | FU Wen-jun JIANG Jing-shan WANG Shuan-rong Lü Luan |
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| Affiliation: | ( 1. Center for Space Science and Application Research, Chinese Academy of Science, Beijing 100080,China; 2. Graduate School of the Chinese Academy of Science, Beijing 100080, China) |
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| Abstract: | 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. |
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| Keywords: | Pulse shaped filter Field programmable gated array Time-varying interpolation poly-phase filter Airborne remote sensing |
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