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Software is the core of Software-Intensive Systems which belong to information equipment. This paper analyses the elements of software support that depend on three-dimensional structure through setting up the static model. The test of software which acquires careful planning must run through the process of Software-Intensive Systems maintenance.

This article discusses the selection of training sequence of burst signals, and analyzes the possibility of synchronous reference sequence for chirp signal as the burst signal; this article takes the burst signal of superposition chirp sequence as its research objective, combines the characteristics of time-frequency concentration of chirp signal, and completes the signal initial frequency estimation based on variable-sampling MFT; in the perspective to further improve the estimated accuracy of MFT to frequency offset and frequency offset primary change rate, this article completes the parameter estimation of received signals based on Music algorithm; finally the systematic analyses of Music algorithm performance is conducted under the conditions of different SNR or different frequency offsets or different frequency offset change rates. The simulation results prove that the parameter estimation method based on Music algorithm does improve the resolution ratio effectively and reduce the errors.

TD-LTE technology can be introduced to improve the performance of military wireless communication system greatly for its better capability of broadband transmission while existing military wireless communication network cannot meet with the increase and further requirements of military task types. The technical characteristics and advantages of TD-LTE are analyzed, the problem of security, anti-jamming and mobility which are to be solved if TD-LTE technology applied in military are mainly studied, and the technical solutions are given.

Channel assignment strategy is a key factor for building a robust and high performance wireless Mesh network. A new channel assignment algorithm called TriCA which considers data traffic interference is proposed, the model is constructed and the idea, computing method and program process are discussed deeply. The simulation result shows that TriCA algorithm can minimize the link interference effectively, and its performance is better than popular MesTic algorithm due to the property of fast convergence and the method of linearization.

PMP-AODV routing protocol which introduces priority setting, multi-point relay and path stability is proposed. The algorithm message format is discussed, the MPR selection algorithm is elaborated, the measurement of stability of path is designed, and the working flow of PMP-AODV is analyzed. The simulation result shows that the PMP-AODV protocol is less packet loss rate and lower end-to-end delay than original AODV protocol under the large wireless Mesh network.

As the specific demand, a wireless audio & video communication system based on 3G network and TI DM368 DaVinci platform was designed. The data acquisition, wireless transmission protocol, G.726 and H.264 AV compression and data encryption were integrated. For improving the security and anti-interferon of data transmission, VPDN technology and the ZETATCP are adopted. The system can be widely used in security monitoring, motion detection, disaster prevention and other fields.

A Wireless Broadband Communication System has been made up based on OFDMA and AMC technologies. The system structure and working pattern is introduced, the OFDMA allocation model, the MIMO and AMC scheme are present, and the parameter such as transmitting power, receiver sensitivity, transmitting antenna gain and receiving antenna gain are designed. The system enables high quality wireless broadband communication. As a supplement with wired communication systems, the system could fulfill the requirement of recovery local communication rapidly when some accidents take place.