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MIMO is one of the techniques used in LTE Release 8 to achieve very high data rates. A field trial was performed in a pre-commercial LTE network. The objective is to investigate how well MIMO works with realistically designed handhelds in band 13 (746-756 MHz in downlink). In total, three different handheld designs were tested using antenna mockups. In addition to the mockups, a reference antenna...
Residential environment improvement is the important part in new rural construction. Land consolidation can bring great fortune for rural development, thereinto, the land consolidation project to improve residential environment is the most important tasks in the study of land consolidation project at present. This paper takes the land consolidation project in Shishi town, Fushun County, Zigong city,...
In the correlation-based leak location, it is supposed that the correlative components in the spatially separately collected acoustic signals merely result from a leak or leaks. This is why a false leak location will be produced when there is a non-leak acoustic source occurring outside a pipeline. To void a false leak location, it is necessary to detect whether or not a real leak exists in the pipeline...
In the traditional acoustic source location methods based on correlation technique, the acoustic signal propagation velocity is a prerequisite that has to be known beforehand. However, in practice, the prerequisite is not always available. Thus, the correlation based location methods are infeasible. Actually the acquired acoustic signals contain the characteristics related to the acoustic propagation...
The leak acoustic signals collected on pipelines play an important role in detecting a leak or leaks in buried pipelines. The traditional detection methods have shown some promise in detecting leak in the absence of a fixed non-leak acoustic source occurring in or outside the detected pipeline. However, in practice, the leak signals are inevitably corrupted with these non-leak sounds as usual. In...
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