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Conference Paper: On the design and multiplier-less realization of digital IF for software radio receivers with prescribed output accuracy

TitleOn the design and multiplier-less realization of digital IF for software radio receivers with prescribed output accuracy
Authors
Issue Date2002
PublisherIEEE.
Citation
The 14th International Conference on Digital Signal Processing, Santorini, Greece, 1-3 July 2002, v. 1, p. 277-280 How to Cite?
AbstractThis paper studies the design and multiplier-less realization of the digital IF in software radio receivers. The new architecture consists of a compensator for compensating the passband droop of the conventional cascaded integrator and comb (CIC) filter. The passband droop is improved by a factor of four and it can be implemented with four additions using the sum-of-powers-of-two (SOPOT) coefficients. The decimation factor of the multistage decimator is also reduced so that its output can be fed directly to the Farrow structure for sample rate conversion (SRC), eliminating the need for another L-band filter for upsampling. By so doing, the programmable FIR filter can be replaced by a half-band filter placed immediately after the Farrow structure. As the coefficients of this half-band filter, the multistage decimators and the subfilters in the Farrow structure are constants, they can be implemented without multiplication using SOPOT coefficients. As a result, apart from the limited number of multipliers required in the Farrow structure, the entire digital IF can be implemented without any multiplications. A random search algorithm is employed to minimize the hardware complexities of the proposed IF subject to a given specification in the frequency domain and prescribed output accuracy, taking into account signal overflow and round-off noise. Design results are given to demonstrate the effectiveness of the proposed method.
Persistent Identifierhttp://hdl.handle.net/10722/46394

 

DC FieldValueLanguage
dc.contributor.authorChan, SCen_HK
dc.contributor.authorYeung, KSen_HK
dc.date.accessioned2007-10-30T06:48:56Z-
dc.date.available2007-10-30T06:48:56Z-
dc.date.issued2002en_HK
dc.identifier.citationThe 14th International Conference on Digital Signal Processing, Santorini, Greece, 1-3 July 2002, v. 1, p. 277-280en_HK
dc.identifier.urihttp://hdl.handle.net/10722/46394-
dc.description.abstractThis paper studies the design and multiplier-less realization of the digital IF in software radio receivers. The new architecture consists of a compensator for compensating the passband droop of the conventional cascaded integrator and comb (CIC) filter. The passband droop is improved by a factor of four and it can be implemented with four additions using the sum-of-powers-of-two (SOPOT) coefficients. The decimation factor of the multistage decimator is also reduced so that its output can be fed directly to the Farrow structure for sample rate conversion (SRC), eliminating the need for another L-band filter for upsampling. By so doing, the programmable FIR filter can be replaced by a half-band filter placed immediately after the Farrow structure. As the coefficients of this half-band filter, the multistage decimators and the subfilters in the Farrow structure are constants, they can be implemented without multiplication using SOPOT coefficients. As a result, apart from the limited number of multipliers required in the Farrow structure, the entire digital IF can be implemented without any multiplications. A random search algorithm is employed to minimize the hardware complexities of the proposed IF subject to a given specification in the frequency domain and prescribed output accuracy, taking into account signal overflow and round-off noise. Design results are given to demonstrate the effectiveness of the proposed method.en_HK
dc.format.extent540572 bytes-
dc.format.extent2564 bytes-
dc.format.extent27162 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.titleOn the design and multiplier-less realization of digital IF for software radio receivers with prescribed output accuracyen_HK
dc.typeConference_Paperen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/ICDSP.2002.1027887en_HK
dc.identifier.hkuros82540-

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