Adsl Pci Modems And Related Functional Modules Designed To Achieve

The mission of this project is designing the hardware circuit of ADSL PCI MODEM,researching Decrete Muti-Tone(DMT) coding method,putting forward the scheme of DMT and relative functional unit.This thesis is devided into four parts.The first part introduces the basic concept of ADSL,ADSL standard and interface regime,ADSL frame structure focusing on DMT theory and the method to design DMT circuit.The second part analyzes the difficulties to design ADSL PCI MODEM and compares the several current solutions.On the basis of ITEX ADSL chips solution,the paper puts forwards the hardware system design including every subsystem.In the third part of the thesis,equalizer of DMT coder and serial communication unit(UART) of ADSL core chip are been design and been verified with VHDL language Matlab tools.lt will do some benefits to develop ADSL core chip.At the last,the paper describes the test enviroment ,test procedure and induces some important test results.All the source code and circuit designing kit are attached in the appendix.