Title :
ALE-FFT algorithms for weak signal acquisition
Author_Institution :
Beijing Inst. of Technol., Beijing, China
Abstract :
Weak signal acquisition is the key problem of deep space detection. The paper discusses an improved weak signal acquisition technology which fits for acquiring the signals having high dynamic range and low signal to noise ratio (SNR). The adaptive line enhancer is applied before the FFT acquisition to improve the acquisition performance and reduce the acquisition time. The output SNR and the dynamic detection ability are enhanced by using the appropriate adaptive line enhancer. Aiming at the residual carrier, the acquisition methods that use the ALE-FFT and normal FFT are compared, the improved FFT acquisition algorithm has better acquisition performance. The spectrum estimation algorithm is discussed also.
Keywords :
fast Fourier transforms; signal detection; ALE-FFT algorithms; adaptive line enhancer; deep space detection; residual carrier; signal to noise ratio; spectrum estimation algorithm; weak signal acquisition; Signal to noise ratio;
Conference_Titel :
Intelligent Signal Processing and Communication Systems (ISPACS), 2010 International Symposium on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-7369-4
DOI :
10.1109/ISPACS.2010.5704773