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In communication countermeasure, in order to efficiently interfere with the enemy, firstly we need to determine the modulation mode of enemy signals. This paper introduces a recognition algorithm of digital modulation signals which based on high-order cumulants. Due to the signals of 8PSK and MFSK have the same cumulants, we can't recognize them directly. Meanwhile, the identify species of exiting...
This paper studies multiple access channels with additive Gaussian noise in the low signal to noise ratio (SNR) regime. We compare the spectral efficiencies of the optimal superposition channel sharing scheme and two simple alternatives: the time division multiple access (TDMA) scheme and the parallel multiple access scheme with single user decoding (PMAS). We consider the situation when the receiver...
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