Broadband Mid-frequency Signal Collecting 1 G / 12 Bits And High Precision Processing Module Hardware System Design

Highly integrated, high processing speed and modular characteristics of the test system, is currently testing technology trends. The performace and speed of Modern systems has grown rapidly and most of them run for the goal of small size and high density. So how to avoid the noise in the high-speed system and how to make sure the signal integrity is an important goal of the signal system design. To enhance the system compatibility of the hardware, the modular integrated design approach also becomes main stream.Combination the research of high performace broadband IF acquisition and processing module, this dissertation gives a comprehensive analysis of signal integrity problem in the hardware system from the five aspects of reflection, signal crosstalk, material dielectric, electromagnetic interference and radiation etc. In board level design and analysis of the system, a series of tools such as the IBIS model from IC supplier, the board level simulation software Hyperlynx of Mentor and the power analysis tools provided by Altera Corporation are used to analysis the problems in the design of power and signal integrity from a systems perspective. Because the sampling rate of the hardware system reaching1Gsps/12bits, two SFP+optical modules are used in the design to achieve the original sampled data output rate of up to12Gbps.A dedicatied design of the hardware ensures that a signal SFP+optical module can reach the maximum transfer rate of8.5Gbps. In order to achieve the performance of the modularity and versatility, the FMC/VITA57interface which is reconfigurable structure based on FPGA is selected. Using such high density、high density interface, acquisition module can be separated completely from and the high speed processing and transmission module which makes the IF processing module based on high speed FPGA and DSP circuits has a strong expansion compatibility. The high speed processing and transmission module can meet the requirements of the different test systems flexiblely.Moreover, the analysis of the various functional modules of the system is provided in detail. The signal integrity existed in the system are solved. Experiments results show that high speed, high throughput data link and the optical fiber transmission meet the design requirements.