Question

classify digital modulation​

Answer 1

Answer:

The common modulation signals can be divided into four classes including ASK, FSK, PSK and QAM according to the modulation method. According to the modulation order, these four classes also can be divided into eleven types, including 2ASK, 4ASK, 8ASK, 2FSK, 4FSK, 8FSK, 2PSK, 4PSK, 8PSK, 16QAM and 64QAM.

Answer 2

Answer:

Seven digital modulation schemes have been considered and seven features have been used as inputs to the neural network (NN) to perform the classification. Several NN structures have been tested that perform at over 99% accuracy at signal-to-noise ratios (SNR) of 10 dB. Design considerations for the NN classifier are discussed and the implementation of these has been shown to produce significant reduction in network size. The performance of the NN-based classifier has also been compared with that of a decision-theoretic classifier; it was found that the NN slightly outperforms the decision-theoretic classifier.