Title:
Low-power discrete Fourier transform and soft-decision Viterbi decoder for OFDM receivers

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dc.contributor.advisor Barry, John R.
dc.contributor.advisor Hasler, Jennifer
dc.contributor.author Suh, Sangwook en_US
dc.contributor.committeeMember Anderson, David
dc.contributor.committeeMember Hamblen, James
dc.contributor.committeeMember Lacey, Michael
dc.contributor.committeeMember McLaughlin, Steven
dc.contributor.department Electrical and Computer Engineering en_US
dc.date.accessioned 2012-02-17T19:14:51Z
dc.date.available 2012-02-17T19:14:51Z
dc.date.issued 2011-08-31 en_US
dc.description.abstract The purpose of this research is to present a low-power wireless communication receiver with an enhanced performance by relieving the system complexity and performance degradation imposed by a quantization process. With an overwhelming demand for more reliable communication systems, the complexity required for modern communication systems has been increased accordingly. A byproduct of this increase in complexity is a commensurate increase in power consumption of the systems. Since the Shannon's era, the main stream of the methodologies for promising the high reliability of communication systems has been based on the principle that the information signals flowing through the system are represented in digits. Consequently, the system itself has been heavily driven to be implemented with digital circuits, which is generally beneficial over analog implementations when digitally stored information is locally accessible, such as in memory systems. However, in communication systems, a receiver does not have a direct access to the originally transmitted information. Since the received signals from a noisy channel are already continuous values with continuous probability distributions, we suggest a mixed-signal system in which the received continuous signals are directly fed into the analog demodulator and the subsequent soft-decision Viterbi decoder without any quantization involved. In this way, we claim that redundant system complexity caused by the quantization process is eliminated, thus gives better power efficiency in wireless communication systems, especially for battery-powered mobile devices. This is also beneficial from a performance perspective, as it takes full advantage of the soft information flowing through the system. en_US
dc.description.degree PhD en_US
dc.identifier.uri http://hdl.handle.net/1853/42716
dc.publisher Georgia Institute of Technology en_US
dc.subject Quantization en_US
dc.subject Power consumption en_US
dc.subject Bit error rate en_US
dc.subject Floating gate en_US
dc.subject Field-programmable analog array en_US
dc.subject Soft-decision en_US
dc.subject Viterbi decoder en_US
dc.subject Discrete Fourier transform en_US
dc.subject Orthogonal frequency-division multiplexing en_US
dc.subject.lcsh Fourier transformations
dc.subject.lcsh Error-correcting codes (Information theory)
dc.subject.lcsh Data transmission systems
dc.subject.lcsh Wireless communication systems
dc.subject.lcsh Orthogonal frequency division multiplexing
dc.title Low-power discrete Fourier transform and soft-decision Viterbi decoder for OFDM receivers en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Barry, John R.
local.contributor.advisor Hasler, Jennifer
local.contributor.corporatename School of Electrical and Computer Engineering
local.contributor.corporatename College of Engineering
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