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The Wireless Application of Spread-Spectrum OFDM Technology in the Internet of Things

Lots of data have to be transferred in the internet of things at high rate. Using spectrum spreaded by LAS multiple access codes and orthogonal subcarriers, spread-spectrum OFDM system integrates both technologies. When it is elaborately designed, the inter-symbol interference and multiple access interference are eliminated to a large extent. In the environment of fading channel, the decision variable of the receiver is given. This kind of wireless or mobile communication system has good performance so that it is very useful in the future application especially in the internet of things.