Title :
Frequency Response Masking based Reconfigurable Channel Filters for Software Radio Receivers
Author :
Mahesh, R. ; Vinod, A.P.
Author_Institution :
Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore
Abstract :
The most computationally demanding block in the digital front end of a software defined radio (SDR) receiver is the channelizer which operates at the highest sampling rate. Finite impulse response (FIR) filters are employed as channel filters in SDR receivers. These channel filters must be less complex and reconfigurable. A new reconfigurable architecture for the implementation of channel filters based on frequency response masking (FRM) technique is proposed in this paper. Our architecture offers multiple levels of reconfigurability in addition to the inherent low complexity features offered by the FRM technique. Design results show that our method offers an average adder reduction of 37% over binary subexpression elimination (BSE) technique and 57% over canonical signed digit (CSD) based techniques.
Keywords :
FIR filters; channel bank filters; frequency response; radio receivers; reconfigurable architectures; software radio; binary common subexpression elimination; canonical signed digit; channel filters; finite impulse response filters; frequency response masking; reconfigurable architectures; software defined radio receivers; Algorithm design and analysis; Channel bank filters; Digital filters; Finite impulse response filter; Frequency response; Narrowband; Receivers; Reconfigurable architectures; Sampling methods; Software radio;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378751
