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Video-SAR combines SAR imaging and video techniques together, enabling continuous surveillance of a specific area, which is a new developing microwave detection technology. Several airborne Video-SAR achievements have been published; however, less attention has been paid to the moving targets in the Video-SAR as well as spaceborne platforms. In this paper, the continuous observation problem of spaceborne...
The dual-frequency Induced Polarization method (IP method for short) has been widely used for the detection of ground and tunnel. Affected by strong noise environment in coal roadway, it is very difficult to accurately detect underground weak IP signals. For the promotion in the field of advanced detection in underground coal mine, it is of great significance to research weak excitation signals detection...
The information of available bandwidth on an end-to-end path is important for various network applications, and several probing methods have been proposed to estimate it in recent years. However, previous methods are either based on fluid model or are only partially suitable for bursty real internet cross traffic; and the accuracy of their estimation degrades at different extents in multi-hop situations...
GLONASS, together with GPS, forms the current Global Navigation Satellite System (GNSS). A high fidelity GLONASS signal simulator is a key instrument for receiver design and verification. It helps early stage algorithm validation and provides controllability and repeatability for receiver testing at relatively low cost. High accuracy signal simulation enables credible receiver characterization before...
Multipath transfer utilizes multiple independent end-to-end paths to improve the total transmission throughput. Reliable transmission protocols as TCP and SCTP suffer resequencing delay due to asynchronous packet arrivals at the receiver as a result of packet reordering. The resequencing delay deteriorates the performance of some delay-sensitive applications. In this paper, we make an analysis of...
TCP is primarily designed for wired networks and became very efficient and robust with years of enhancements. However, experiments and research showed that TCPpsilas congestion control algorithm performs very poorly over Wireless Sensor Networks with degraded throughputs. This paper studies TCPpsilas throughput issues in Wireless Sensor Networks, and designs an improved congestion control algorithm...
Transmission control protocol (TCP) is a reliable, end-to-end transport protocol, which is widely used for data services and is very efficient for wired networks. However, experiments and research showed that TCP's congestion control algorithm performs very poorly over wireless sensor networks with degraded throughputs. This paper studies TCP's throughput issues in wireless sensor networks, and designs...
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