基于FPGA与DSP的嵌入式GNSS接收机设计

随着GNSS接收机应用的不断深入,其对系统功耗、体积等性能的要求越来越高。大规模集成电路芯片如现场可编程逻辑门阵列(FPGA)和高速数字信号处理器(DSP)等在嵌入式GNSS接收机设计中得到广泛应用。卫星信号数字处理是接收机的核心部件之一,提出了一种基于FPGA与DSP模块化的嵌入式接收机的基带信号处理系统设计。利用FPGA完成基带相关器的设计,并由DSP实现卫星信号的信号处理和定位导航解算。通过静态测试试验,说明所设计的GNSS接收机具有体积小、功耗低和实时性强等特点。

AN INTERVAL ALGORITHM FOR CONSTRAINED GLOBAL OPTIMIZATION

In order to solve the constrained global optimization problem,we use penalty functions not only on constraints but also on objective function. Then within the framework of interval analysis,an interval Branch-and-Bound algorithm is given,which does not need to solve a sequence of unconstrained problems. Global convergence is proved. Numerical examples show that this algorithm is efficient.

MOVING MOUNT China and the United States discuss bilateral relations and golbal issues during the first Strategic and Economic Dialogue

"Yes, we can was the mantra of the campaign that made Barack Obama the 44th President of the United States this year. Chinese State Councilor

Promoting Golbal Governance and Keeping Balanced Development

Before discussing the issue of global security governance today, we should review the past and see how we have come to today step by step and how we have established the present multipolar structure.I. World WarⅡand Bipolar Pattern After World WarⅡ, the world was divided into two camps headed by the United States and the Soviet Union respectively. The political and economic systems of the two comps were totally different.