SVD based reconfigurable SRC filter for multi-standard radio receivers

• Published in: IET circuits, devices & systems Vol. 10; no. 5; pp. 375 - 382
• Main Authors: Agarwal, Ashok, Bopanna, Lakshmi
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 01.09.2016; John Wiley & Sons, Inc
• Subjects: Algorithms; antialiasing; Bandwidths; CDMA 2000; channelisation; Channelization; coefficientless cascaded-integrator-comb filter; comb filters; computational intensive task; Design; Design engineering; Design standards; Digital filters; Fourier transforms; Gain; gain droop compensation; GSM900; Mathematical models; MATLAB; minimum reconfiguration overhead; multiple radio communication standard; multistandard radio receiver; passband; Radio; Radio communications; Radio frequency; Radio receivers; Receivers & amplifiers; reconfigurable antialiasing filter; reconfigurable SRC filter; Reconfiguration; sample rate conversion; SDR; SDR receivers; Signal processing; Singular value decomposition; singular value decomposition algorithm; Software; software defined radio; Software radio; spectral characteristic; spectral response; Spectral sensitivity; Spectrum allocation; SVD; Task complexity; variable digital filter; VDF; WCDMA; WiMAX 802.16; wireless industry; SVD; multiple radio communication standard; MATLAB; multistandard radio receiver; software radio; comb filters; wireless industry; variable digital filter; VDF; spectral characteristic; minimum reconfiguration overhead; singular value decomposition; SDR; GSM900; WCDMA; spectral response; reconfigurable SRC filter; software defined radio; reconfigurable antialiasing filter; radio receivers; antialiasing; SDR receivers; channelisation; singular value decomposition algorithm; CDMA 2000; digital filters; passband; gain droop compensation; sample rate conversion; WiMAX 802.16; computational intensive task; coefficientless cascaded-integrator-comb filter
• ISSN: 1751-858X; 1751-8598; 1751-8598
• DOI: 10.1049/iet-cds.2016.0073

With the recent growth in wireless industry, and changes that occur at a faster pace in radio standards, software defined radio (SDR) provides a flexible solution when compared with hardware radios. Channelisation and sample rate conversion (SRC) are two computational intensive tasks to be carried out in SDR receivers. Reconfigurable anti-aliasing filter and channeliser with minimum reconfiguration overhead is needed for the design of SDR receivers. Low complexity, coefficientless cascaded-integrator-comb filters provides flexible reconfiguration for SRC over a wide integer range, but offers gain droop in the passband of interest. Moreover, they are not suitable for achieving SRC by fractional rates. In this study, the authors propose the design of variable digital filter (VDF) for gain droop compensation and fractional SRC to meet the spectral characteristics of multiple radio communication standards, employing singular value decomposition algorithm. The proposed design of VDF is tested for its reconfigurability with four radio standards, namely, GSM900, WCDMA/CDMA 2000 and WiMAX 802.16. Simulations carried out in MATLAB showed that the proposed VDF had improved spectral response in comparison to other methods proposed in literature.