Monday, March 29, 2010

amount of wireless communication service

Nowadays, with the increasing of the amount of wireless communication service and the type of the data transmitted, the requirement of the speed of the data transmitted and QoS is increasing fast. Channel fading is one of the factors restrict improving the performance of cheap womens nike shoes communication service, so it’s important to depress the impact of channel fading. To confront the impact of channel fading, people bring forward diversity and MIMO to improve the receive cheap men's nike shoes SNR, that transmit and receive information using multi-antenna at both the nike running shoes transmitter and receiver. By using these, the performance of communication nike shoes system was improved obviously, but these bring forward new demand to the antenna of mobile terminal and base nike trainers station and transmit power.To solve the problem of the antenna of mobile terminal, people then bring forward cooperation diversity. It will choose another terminal as a partnership when a terminal can’t communicate directly to another one, then it will transmit the information that received from the resource after processing. The antenna of the terminal composing a virtual MIMO system, which can achieve transmit diversity and receive diversity.
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