Thursday, April 8, 2010

integration and personalization

To the emergence of cellular systems as a starting point, with development of integrated circuit technology, computer and Communication technology,mobile communication have developed in time of 3G. The 3G mobile communication system is forward to globalization,integration and personalization, WCDMA, CDMA2000 and TD-SCDMA as the main representatives of 3G.TD-SCDMA is a Chinese 3G mobile communication wireless interface standard, which is wedding dresses form china submitted to ITU, accepted as a part of CDMA-TDD in international norms. This is a major breakthrough in the history of Chinese telecommunications, and important milestone in the development for mobile communications in China. Differ from WCDMA and cheap nike shoes which implement with FDD, TD-SCDMA combines advantages of CDMA and TDD, With a flexible air interface, use smart antennas, joint detection and other advanced technologies, have a very high technical features. It has the highest spectral efficiency in the three mainstream standard.The key technologies of hot women's dresses mainly are concentrated in the baseband part, such as smart antenna, joint detection, uplink synchronization, dynamic channel allocation, relay switching, the wireless network, power control, software radio, channel estimation and so on. TD-SCDMA is a synchronous CDMA, synchronization technology is an important technology to reduce multiple access interference, enhance system capacity and simplify the receiver. In the shop 4u blog for shirts system, the downlink is always synchronized, so in general said, synchronous blog lace wedding dresses means uplink synchronization, which requires uplink signals from different distances and different user terminals to arrive at base station the same time.Uplink synchronization algorithm in new wedding dresses is based on the good auto-correlation of the sequence which is used for synchronization, and has greatly computation.
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