Title :
Quadrature Coherent Detector of Wideband Internediate Frequency Signal
Author :
Minglei, Yang ; Baixiao, Chen ; Shouhong, Zhang
Author_Institution :
Nat. Lab. of Radar Signal Process., Xidian Univ., Xi´´an
Abstract :
On the basis of reviewing and contrasting the three processing methods of quadrature sampling of intermediate frequency (IF) signal: the LPF (low pass filter) method, the Bessel interpolation method and the polyphase filter method, this paper deals with the applicability of the three methods with wideband signals. Through the analysis of the progression of spectra and simulations on computer, it can be concluded that the maximum processing bandwidth is fs/2 and the LPF method is more suitable for the quadrature coherent detector of wideband IF signal and the characteristics of the filter fit for it and something that deserve to be noticed are also given. Finally the application of wideband signal using the LPF method is illustrated with an example
Keywords :
Bessel functions; interpolation; low-pass filters; signal detection; signal sampling; Bessel interpolation method; LPF method; low pass filter; polyphase filter method; quadrature coherent detector; signal sampling; wideband intermediate frequency signal; Band pass filters; Computational modeling; Detectors; Frequency; Interpolation; Low pass filters; Signal analysis; Signal processing; Signal sampling; Wideband; Quadrature coherent detector; the Bessel interpolation method; the LPF method; the polyphase filter method; wideband signal;
Conference_Titel :
Radar, 2006. CIE '06. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-9582-4
Electronic_ISBN :
0-7803-9583-2
DOI :
10.1109/ICR.2006.343510
