An important aspect of Software Defined Radio is the ability to define the bandwidth of the filter that selects the desired channel. This paper first explains the importance of channel filtering. Then the advantage of analog channel filtering with a variable bandwidth in a Software Defined Radio is demonstrated. This is done by comparing the requirements of the analog-to-digital converter with and without an analog filter with a variable bandwidth. Then, a technique for channel filtering is described, in which two passive filters are combined to obtain a variable bandwidth. Passive filters have the advantage of high linearity, low noise and inherent energy efficiency. Some limitations of the concept are discussed. Finally, conclusions are drawn and our ideas for further research are presented.
|Title of host publication||the 12th ProRISC Workshop (Program for Research on Integrated Systems and Circuits)|
|Place of Publication||Utrecht|
|Number of pages||4|
|Publication status||Published - Nov 2001|
|Event||14th ProRISC Workshop on Circuits, Systems and Signal Processing 2003 - Veldhoven, Netherlands|
Duration: 25 Nov 2003 → 27 Nov 2003
Conference number: 14
|Publisher||STW Technology Foundation|
|Workshop||14th ProRISC Workshop on Circuits, Systems and Signal Processing 2003|
|Period||25/11/03 → 27/11/03|
- Software Defined Radio
- passive filter
- analog front-end
Arkesteijn, V. J., Klumperink, E. A. M., & Nauta, B. (2001). Variable Bandwidth Analog Channel Filters for Software Defined Radio. In the 12th ProRISC Workshop (Program for Research on Integrated Systems and Circuits) (pp. 258-261). Utrecht: STW.