mentioned above

In order to overcome the two major defects of ICA as it was mentioned above, an innovation in this work that channel identification codes are used considering the characteristics of the MGDM system is given, which can greatly reduce complexity of the system while guaranteeing the plus size wedding dresses de-multiplexing performance of system. The corresponding FastICA algorithm based on negentropy is developed.Finally, a 2×2 IM-DD MGDM experimental system is built and is used to transmit different rates of digital signals and digital video signal directly which showed the blog new shirts 2010 limitation of spatial selective detection. Under the condition of off-line, de-multiplexing of the cheap evening dresses real data which are gathered from the MGDM experimental system are realized with the improved FastICA algorithm, and the performance of this method is similar to that of the zeros forcing blog wedding dresses 2010 method. The performance of the combination of this algorithm with the Butterworth low-pass filter is studied, and the system can work at 5dB (SNR) with the implementation of this custom made prom dresses de-multiplexing method.In the short-distance high-speed communications network, multimode fiber communication system which based on the MGDM has unique advantages of fiber-optic network and the same function as WDM which the SMF are used, which can considerably enhance the cheap evening dresses system capacity and solve the bandwidth limitation of multimode fiber effectively. However, the requirements in the system are less critical than WDM on the light source, and the installation and maintenance of multimode fiber are more convenient and its components are reasonable in price. The adoption of the proposed method can make the de-multiplexing of MGDM system easier only with the information of received signals, and avoid the complexity of matrix inversion without using pilot signal and estimating the channel matrix, so the system complexity may be lower and so as the cost.
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