The thesis analyses the principles of the physical layer and data link layer of gsm system and the signal processing theories of gsm under unauthorized circumstances . computer simulations are given to show the feasibility of these theories . the design of real - time processing system of gsm signal is introduced , which includes a real - time processing circuit , a dsp software system and a computer monitor platform 本文分析了gsm系統(tǒng)無線接口的物理層和數(shù)據(jù)鏈路層的工作原理;詳細(xì)闡述了非正常接入條件下的gsm信號處理理論,并給出仿真結(jié)果;介紹了gsm信號實(shí)時(shí)處理系統(tǒng)的設(shè)計(jì),包括實(shí)時(shí)處理電路和dsp軟件系統(tǒng)的開發(fā),以及主機(jī)監(jiān)控平臺(tái)的設(shè)計(jì)。