Baseband Signal System's Design And Realize Based On The Stel-2000A

This article in read and has studied in the massive related literature foundation,Corporation produced ASIC Spread-Spectrum(SS) chip STEL-2000A and Xilinx Corporation's Spartan-3 series XC3S400 take American Stanford Telecom as the core,auxiliary by high speed peripheral circuit designs and high speed AD:AD9481,high speed DA:AD9742 has realized a baseband signal processing system.This article first introduced the Spread-Spectrum(SS) communication technology's basic principle and the current state of development,then has carried on hardware circuit's design,including system overall frame design and each kind of system parameters choice. This plan's design uses the ASIC chip to complete'in the baseband signal processing system's majority major function,may use the software to carry on the control,the electric circuit is simple,the use is flexible,can satisfy the maximum data transfer rate is 1.024Mb/s.Has completed the hardware circuit designas well as between them the periphery interface circuit has carried on the detailed discussion to system's each chip performance.After the analysis grasps the chip control succession and the system principle of work,carried on system's software design,the design has given the AD9481 analog/digital transformation control module, the AD9742 transformation control module,the STEL-2000A controller interface module, the BPSK modulation module,the asynchronous serial port communication module.The software design used the VHDL hardware description language to coordinate Xilinx completely Corporation's special-purpose programming software ISE the WEBPACK 10.1 to carry on the detailed software design,and carried on the debugging with the Modelsim6.2SE simulation system func--tion finally used Xilinx Corporation programmable FPGA chip XC3--S400 to complete,sati--sfies the system design the request,has achieved the anticipated effect.