Sunday, March 28, 2010

communications

With the progress in technology, the demand on communications between human beings becomes higher and higher. At present, a wide range of communication shop 4u blog for shirts systems co-exist in China mobile communication system, which include public cellular mobile, for example, GSM, CDMA, DCS, PHS, WCDMA, TD-SCDMA, CDMA2000, WLAN, etc., and cheap nike shoes digital trunking communication system, for example, TETRA.Because of the north face jackets productive structure adjustment, people stay indoor much more time than outdoor. According to the statistics from 2G business, more than 70% business is brought indoor. It shows that the in-building northface jackets coverage is particularly important in the wireless communication.In the traditional indoor coverage solution, the closed circuit equipment only aims at some operator's several service patterns to cheap womens nike shoes carry on the closed circuit. Thus, it will bring the incomplete coverage on the correspondence service pattern, or cause many distribution systems in the identical plot and buildings, the redundant investment, the building redundant project, the higher construction cost and so on.According to the current situation of China wireless communication in-building coverage; the author designs the POI which contains China present public mobile communication frequency bands, the up-Link and the down-Link separation system's POI.
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