Wagstaff, A. J.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1049/iet-com:20070634|
|Google Scholar:||Look up in Google Scholar|
Cyclostationary techniques have been applied widely to the problem of recognising communication modulation schemes. As these techniques are processing intensive, much effort has been invested in researching algorithms that can reduce the number of computational steps required, with fast Fourier transform approaches predominating. A novel approach to improve the extent of the cyclic frequency (α) is proposed. By using the constant Q transform (CQT), a logarithmic form of the spectral correlation function (SCF) can be produced. This allows the α-axis to be extended, which can be advantageous when the receiver bandwidth cannot be well matched to the signal frequency and bandwidth using a priori knowledge of spectrum allocation. It is found that a CQT-based SCF can form the basis of a logarithmic cyclic frequency domain profile algorithm without loss of sensitivity compared with the conventional, linear form.
|Item Type:||Journal Article|
|Copyright Holders:||2008 The Institution of Engineering and Technology|
|Academic Unit/Department:||Other Departments > IT
|Depositing User:||Colin Smith|
|Date Deposited:||14 Apr 2009 15:03|
|Last Modified:||15 Jan 2016 11:09|
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