This paper introduces the universal of serial communication at first.Then the steps of the serial communication are explained.And also the three ways to achieve the serial communication are discussed,that is,the way based on the MSComm of VC++,the way based on the API function and the way of multithreading.At last the three ways are compared.

The total structure of the communication confront system is described and the mostly function is introduced in this paper.Importantly the achievement of the effect-evaluation module and the design of the software parts of the system are discussed in detail.

This paper presentes the theory and design about FIR filter in FPGA.In the article,it designs a 8 stairs lowpass digital filter.Though this example,it discusses some kinds of algorithmic of multiplier in the FIR filter,and contrasted their merits and defects.Then it finds a feasible and efficient method to design the FIR filter.

In current military war,the electronic war(EW) equipment has developed from a single equipment to the system,so possessing an high effective EW system can exerts the maximum potential ability of the equipment,thus master the initiative of the war.This paper describes the total construction of the communication countermeasure system,introuduces the prime battle function of the system,analyses the detailed design thought of the software part in the system in the end.