SURVEY ON VARIABLE DIGITAL FILTERS USED FOR CHANNELIZATION IN SOFTWARE DEFINED RADIO

Author(s) : Nimmy Vincent, Neema M

Volume & Issue : VOLUME 2 / 2017 , ISSUE 1

Page(s) : 55-63


Abstract

There are multiple wireless commu-nication standards available nowadays which offer high range of services. To incorporate all these on a single hardware Software Defined Radio (SDR) has been proposed as a solution. SDR receivers use variable digital filters (VDFs) to perform multi standard channelization, i.e., extraction of desired radio channels (frequency bands) from a wideband input signal. VDFs provide variable frequency responses such as low pass, high pass, band pass and band stop and multi-band with a small change of parameters. This paper deals with the study of different design methods of VDFs that offer variable responses with less complexity, resource utilization and power consumption etc. There are different types of VDFs such as programmable filters and fixed coefficient filters. The study gives a brief description of different types of VDFs and how the reconfigurabilty is achieved in the design.



Keywords

VDF, Software Defined Radio, Frequency response masking, coefficient decimation

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