Broadband Frequency Acquisition And Processing Module Of The Software Design

Based on the idea of virtual instruments, we design a broadband IF module. This module has four channels, which has the function of high speed data transceiver、 high-precision continuous acquisition and real-time wideband digital processing. Broadband IF module has a wide range of applications in many field, such as the software radio communications、 information reduction、 electronic warfare、 radar identification and mixed-signal testing and so on.The dissertation focuses the overall architecture, and discourses the content from the following five areas.1、The broadband IF module is composed physically high-speed sampling daughter board and reconfigurable processing board. The daughter board is responsible for four optional broadband IF signals to digital samples, with highest1GSPS sampling rate, and flexible sample clock configuration; the caring board with multi-chip high-density FPGA+DSP structure, constitutes a broadband digital signal processing platform.2、According to the needs of the broadband IF module, we design a application program interface on the LabVIEW platform, the interface can control the hardware through the following ways:choosing the channels paths, sampling rates, the storage and triggering patterns, etc.,and can real-time display the spectrum data、I/Q data, further more it can process the signal like frequency analyzing, trajectory transforming and power triggering.3、Based on the Hardware platform and software platform, we use WinDriver achieving hardware and PC docking.the underlying hardware-driven development using dynamic link library in the form of the standard package of its functions, Chapter V of this paper will elaborate on how the underlying hardware drivers inside the host computer and the communication of the underlying hardware.4、Finally the problems encountered during the debugging process and solutions are described, and through the joint commissioning of applications program and hardware, test the entire system functions correctly and complete.