Thursday, April 8, 2010

communication engineering

In the short-wave communication engineering, people often need to test the performance of the short-wave communication equipment. If the tests are taken over the real short-wave channel, much time, manpower and money had to be cost, and it is impossible to have the ralph lauren polo shirts same tested condition and channel environment. In addition, it is difficult to change the channel parameters by manmade. Consequently, the accuracy of Lacoste Polo Shirts simulators for test purpose becomes increasingly crucial. Especially wide band high frequency (Cheap Lacoste Polo Shirts) communication was developing with a high speed in the last decades, so the chi flat iron channel simulator weighs heavily in the applications.At present, short-wave channel simulator studies have become more sophisticated in foreign countries, but these simulators’target is audio signal, data-processing chi flat iron rate low, and expensive.The start time of the studies of short-wave channel simulator is much later in domestic, however, it have made some progress, but many of these simulators are based on chi hair straighteners implementation for narrow-band HF channel. Wide band channel simulate requiries substantial high-speed parallel signal processing, and FPGA is more suitable than DSP in the aspect. The research goal of this paper is to realize a reconfigurable broadband shortwave channel simulator, whoes processing unit is FPGA.

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