NDLI: Single channel steepest descent algorithm for the correction of cycle frequency error

Content Provider	IET Digital Library
Author	Cai, Xin Wang, Xiang Huang, Zhi Tao Wang, Feng Hua
Abstract	The beneficial characteristics of signal cyclostationarity have been widely exploited in varied domains. However, one common problem is that algorithms adopting cyclostationarity would suffer from severe performance degradation when there is an error or mismatch in the cycle frequency (CF) involved. Hence, the authors attempt to propose a single channel correction method for CF error (CFE). First, a new cyclostationary spectral feature function is introduced which reaches its maxima at CFs; second, the steepest descent algorithm is deduced for the correction of CFE, the convergence property of which is also discussed. The main contributions of the novel scheme are that first, the estimation accuracy is remarkably improved compared with most existing algorithms adopting cyclic feature functions. Second, the steepest descent scheme holds an advantage in computational complexity compared with previous works based on linear search. Moreover, the proposed algorithm is robust against the pulse shape variation and multipath fading. Simulation works are carried out, which demonstrate the performance of the algorithm under varied environment conditions, and results fit well with theoretical analysis. Comparisons with existing methods are also presented, together with examples to illustrate how the correction scheme can be applied in real systems.
Starting Page	1829
Ending Page	1838
Page Count	10
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 14, Sep (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.1235
Journal	IET Communications
Publisher Date	2016-09-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Array Beamforming CF Error Computational Complexity Convergence Property Cycle Frequency Error Correction Cyclic Feature Function Cyclostationary Spectral Feature Function Error Correction Gradient Method Interference Suppression Interpolation And Function Approximation Linear Search Multipath Fading Numerical Analysis Performance Degradation Pulse Shape Variation Signal Cyclostationarity Characteristic Signal Parameter Estimation Signal Processing Signal Processing And Detection Signal Processing Theory Signal Separation Single Channel Correction Method Single Channel Steepest Descent Algorithm Spectrum Sensing
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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