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To account for the problems of long delay, large loss, low SNR and no feedback information in IPN (InterPlaNetary Internet) backbone network, we proposed multihop relay protocols based on fountain codes. The rateless property, erasure property and no need feedback of fountain codes, which combined the advantage of relay make us propose the Random Linear Network Coding (RLNC) based and LT code based multihop relay protocols. We give the analysis and simulation results in transmission and delay of every protocol. The results indicate that we need to consider the residual energy, work mode and processing ability comprehensively in the selection of these protocols to realize the efficient and reliable transmission in the IPN backbone network.

The intrapulse modulation recognition of radar signals is an important part of the radar reconnaissance. By means of the digital channelized receiver on processing simultaneous signals, the recognition method in this paper accomplishes the separation and recognition of the different modulated signals from a complex multiple environment with simultaneous signals. Further, from the statistical characteristics of the intrapulse instantaneous frequency, the modulation types can be recognized and the modulation parameters can be extracted using this method. The experimental result provided the effectiveness of this proposed method.

Optimizing wireless networks represents a complex task, directly affecting quality, coverage, capacity and cost. In this paper, a new coverage presentation method based on geographic information system is proposed for coverage optimization in CDMA work. The proposed method represents a novel approach in that it focuses on distribution of successful access points around the base station (BS), that can reflect the actual coverage situation vividly. We analyze and render the distribution of the mobile stations (MS), which successfully access the base station in CDMA network in order to figure out coverage boundary. In a live network optimization test, application of this method to a cell with high proportion of soft-switching has shown the effectiveness of proposed approach.

With the development of Rich Internet Applications (RIAs) in recent years, the RIA technology is now widely deployed for user interface. But large amounts of conventional RIAs have close-coupled modules and not very well structure. They will become a great barrier for large scaled applications. In this paper we present an approach to transform conventional RIAs to structured well RIAs which are based on PureMVC framework. PureMVC is a lightweight framework for creating applications based upon the classic Model-View-Controller design meta-pattern. In this migration model, we adopt abstract structure view and abstract logical view to analyze original RIAs, and then make a smooth transform at a low cost. In addition, we introduce this migration model into a practical RIA and evaluate its utility.