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In our proposed model, the signal is demodulated using the DSSS-SIC scheme, which adds DSSS to the normal SIC method. First, the received signal is despread following the normal CDMA decoding to demodulate a cluster of users with power level m. Then, the signal of each user is re-modulated and re-spread just like the transmitter to reproduce the received signal. Finally, the received signal is cancelled with all the received signals of power level m. This is repeated for the number of power level divisions.
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