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This paper propose a novel scheme combining wavelet packet denoising and cyclic spectrum feature to detect signal. Since many non-stationary signals existing in communication system have cyclostationnary features, signals can be detected by taking advantage of cyclic spectrum. But when the signal spectrum has more complex structure, the noise component is too large or noise itself has cyclostationary...
Orthogonal multi-carrier modulation draws more and more attention due to its resistance to multipath delay. Though OFDM technology have outstanding virtues that single-carrier cannot compete with, a difficulty about OFDM signals is that they have a very large peak-to average ratio. This paper analyses and compares the principle of some conventional schemes of reducing PAPR and introduces an optimization...
Sampling is the link between analog signal and digital signal. With the rapid development of information technologies, demands for the amount of information are increasing at very fast speed. So the systems in existence are very difficult to meet the challenges of sampling at high speed, transmitting and storing large volume data. How to acquire information in signal efficiently is an urgent problem...
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