Publication:
Quantization degradation of GNSS signal quality in the presence of CW RFI.
Quantization degradation of GNSS signal quality in the presence of CW RFI.
dc.contributor.author | Tabatabaei Balaei, Asghar | en_US |
dc.contributor.author | Akos, Dennis | en_US |
dc.contributor.author | Dempster, Andrew | en_US |
dc.date.accessioned | 2021-11-25T15:17:26Z | |
dc.date.available | 2021-11-25T15:17:26Z | |
dc.date.issued | 2008 | en_US |
dc.description.abstract | In a Digital Matched Filter (DMF) the degradation of signal quality depends on the pre-sampling filter bandwidth and on the number of Analogue to Digital Converter (ADC) bits. Digital matched filters are used in the acquisition of Global Navigation Satellite Systems (GNSS) signals. Automatic Gain Control (AGC) in the GNSS receivers is used to determine the maximum level of quantization by the ADC. In [1], the quantization degradation for different pre sampling bandwidths and ADC bits is analysed in the presence of Additive Gaussian white noise (AGWN). Bandwidths of more than once (or twice) the data bit rate contribute only about 0.4dB (or (0.2dB) to the overall degradation of the DMF. Also 2 bit uniform step quantization with optimum ADC threshold setting is shown to recover most of the digital implementation degradation. In this paper by focusing on pre-sampling filter bandwidth equal to the data bit rate and 2 bit ADC, the effect of quantization on the received GNSS signal quality in the presence of Continuous Wave (CW) radio frequency interference (RFI) is analysed. It is shown that a one bit ADC can have much higher degradation than the 3.5 dB in the AGWN case. It is also shown that the effect of AGC on the quantization degradation has to do with both power and frequency of CW RFI. In the presence of CW RFI, the optimal value for ratio of maximum threshold of ADC to the effective noise RMS is shown to be about 1.35 which is higher than the case when RFI does not exist (0.8). | en_US |
dc.identifier.uri | http://hdl.handle.net/1959.4/44310 | |
dc.language | English | |
dc.language.iso | EN | en_US |
dc.rights | CC BY-NC-ND 3.0 | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/au/ | en_US |
dc.source | Legacy MARC | en_US |
dc.title | Quantization degradation of GNSS signal quality in the presence of CW RFI. | en_US |
dc.type | Conference Paper | en |
dcterms.accessRights | open access | |
dspace.entity.type | Publication | en_US |
unsw.accessRights.uri | https://purl.org/coar/access_right/c_abf2 | |
unsw.description.publisherStatement | ©2008 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_US |
unsw.identifier.doiPublisher | http://dx.doi.org/10.1109/ISSSTA.2008.15 | en_US |
unsw.relation.faculty | Engineering | |
unsw.relation.ispartofconferenceLocation | Bologna, Italy | en_US |
unsw.relation.ispartofconferenceName | 10th Int. Symp. on Spread Spectrum Techniques & Applications | en_US |
unsw.relation.ispartofconferenceProceedingsTitle | 10th Int. Symp. on Spread Spectrum Techniques & Applications | en_US |
unsw.relation.ispartofconferenceYear | 2008 | en_US |
unsw.relation.ispartofpagefrompageto | 42-47 | en_US |
unsw.relation.originalPublicationAffiliation | Tabatabaei Balaei, Asghar, Surveying & Spatial Information Systems, Faculty of Engineering, UNSW | en_US |
unsw.relation.originalPublicationAffiliation | Akos, Dennis, Surveying & Spatial Information Systems, Faculty of Engineering, UNSW | en_US |
unsw.relation.originalPublicationAffiliation | Dempster, Andrew, Surveying & Spatial Information Systems, Faculty of Engineering, UNSW | en_US |
unsw.relation.school | School of Civil and Environmental Engineering | * |
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