| Based on the sub-project of state-key research on spectrum sensing in wireless sensor network and a new type of distributed retrieval Ad Hoc network system,this paper designed and implemented the specific network management software system for wireless spectrum sensing network.According to the functional analysis, we divided the overall structure of the system into network layer,distribution layer business layer, front presentation layer so that we can easily design and implement the whole software system.This paper mainly introduce parameter estimates module of “The electromagnetic spectrum monitoring system based on wireless sensor network†form software designer,algorithm implementation,testing.This first chapter analyzes the research background introduces domestic and foreign current research circumstances. The second chapter mainly introduces the network layer of the electromagnetic spectrum monitoring system which includes demand analysis,network topology selection,IO model selection and so on. In order to develop a stable and efficient network layer, we use and reference to open source software such as libevent, memcached.Then the paper introduces the overall structure of the spectrum monitoring system based on wireless sensor network including the physical structure and software architecture. The forth chapter mainly introduce the frequency estimation,symbol rate estimation and the identification algorithm of our project.The last two mainly introduce the testing procedure of our software, algorithms, and then we show our achievement and the existing problems to be solved.After a lot of functionality, performance testing for weak signal detection and signal recognition module, the result entirely achieves the target and meets the system weak signal detection and signal recognition requirements. |
