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In PCM/FM remote sensing receiving system, when the bit rate is above 1Mbps, the signal suffers frequency select fading, which causes the serious inter-symbol interference (ISI); power allowance can no longer guarantee the system quota. Besides signal reflection such as buildings, ground, mountains and atmospheric refraction eventually become the multipath interference signals. Thus an adaptive filter...
The orthogonal wavelet lowpassed filters coefficients with arbitrary length are constructed in this paper. When N=2k and N= 2k−1, the general analytic constructions of orthogonal wavelet filters are put forward, respectively. The famous Daubechies filter and many other wavelet filters are tested by the proposed novel method, which is very useful for wavelet theory research and many applications areas...
This article first briefly introduces the basic principles of the multipath effects and analyzes the causes of the multipath fading, and then gives the standards definition for some related concepts and rigorous mathematical expressions for those. Then, based on a theoretical model, using dynamic system modeling and simulation software package Simulink of the Matlab software, this article gives the...
Microphone array has been widely applied to the conference mode, while the application on the mobile phone is still in the initial stage. Because hardware processing speed of mobile phone is low and the environment where we use mobile phone are complex as the restriction condition, now the use of microphone array technology on the mobile phone still has many difficulties needs to overcome. In order...
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