DRAFT IS-GPS-705A Comment Resolution Matrix - GPS.gov

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IS-GPS-705 CRMCID Originator/Org. Page/Para Importance Comment PO Resolution & Concurrence Notes-30 dBc at Df =1 Hz decreasing 30 dB/decade untilit reaches Df = 10 Hz. From 10 Hz to 10,000 Hz itdecreases at 10 dB per decade reaching -90 dBc atDf = 10,000 Hz.”From: The phase noise spectral density of the unmodulatedcarrier shall be such that a phaselocked loop of 10 Hz one-sided noise bandwidthshall be able to track the carrier to an accuracy of0.1 radians root mean square (RMS). Seeadditional supporting material for phase noisecharacteristics in section 6.3.2.Final To: The phase noise spectral density of theunmodulated carrier shall not exceed themagnitude of a straight line (on a log-log plot)between -30 dBc/Hz at 1 Hz and -60 dBc/Hz at 10Hz, and another straight line between -60 dBc/Hzat 10 Hz and -80 dBc/Hz at 10 kHz. Spurs in thephase noise spectral density of the unmodulatedcarrier between 10 Hz and 10 kHz shall not exceed-40 dBc.10-sept-09: This AI #12 has been closed andthe new text is in the document.10/01/09: Changed language for thissection to Bud Bakeman proposal. C.Hegarty took on a action to review twodifferent alternatives in the requirementlocation of carrier phase noise. ICWGstakeholders agreed with option (b) of hispackage..i.e. -80 dBc/Hz at 10 kHz.40 Thomas NagleGPCPage: 10Para: 3.3.1.2SRationale: It is not appropriate to assume UserEquipment receiver implementation. IS shouldspecify the signal-in-space, not receiverperformance.Comment: Correlation Loss in this paragraph hashad a long-standing inconsistency: with this lossdefined as the difference between power receivedin 24 MHz bandwidth and that recovered from aperfect 24 MHz correlator, there should be noadditional loss due to “ideal receiver waveformdistortion”. Suggested Change: Change the lastsentence to read “For this case, the correlationloss due to SV modulation and filter imperfectionsshall be less than 0.6 dB”.From: Correlation loss is defined as the differencePO Resolution: A/CRationale: for discussion at Public ICWG.Concurrence: ConcurRationale:11/19/08: New proposed change presentedat ICWG by Bakeman. There was somediscussion that the proposed change waswritten more like a factory test spec asopposed to a SIS spec. Action assigned toMike Deelo to set up meeting withappropriate stakeholders to reviseproposed change. Comment to remainopen. 30-jul-09: Bud Bakeman has theaction with his proposed wording. 200 POCwill get language into documents (200). 13-aug-09: refer to AI #12 for resolution. 10-12
IS-GPS-705 CRMCID Originator/Org. Page/Para Importance Comment PO Resolution & Concurrence Notesbetween the SV power received in a 24 MHzsept-09: This AI #12 has been closed andbandwidth and the signal power recovered in anthe new text is in the document. 10/01/09:ideal correlation receiver. The worst caseThis section was under rigourous reviewcorrelation loss occurs when the I5 carrier isand the ultimately the consensus of themodulated by the sum of the I5-code and the NAVICWG community was to revert to wordingdata stream. For this case, the correlation losssimilar to the IS-GPS-800.apportionment shall be as follows: 1. SVmodulation and filter imperfections: 0.6 dB 2.Ideal UE receiver waveform distortion (due to 24MHz filter): 0.4 dBFinal To: Correlation loss is defined as thedifference between the SV power received in thebandwidth defined in 3.3.1.1 (excluding signalcombining loss) and the signal power recovered inan ideal correlation receiver of the samebandwidth using an exact replica of the waveformwithin an ideal sharp-cutoff filter bandwidthcentered at L5, whose bandwidth corresponds tothat specified in 3.3.1.1 and whose phase is linearover that bandwidth. The correlation lossapportionment due to SV modulation and filteringimperfections shall be 0.6 dB maximum.37 Thomas NagleGPCPage:Para:SRationale: CorrectnessComment: Suggested Change: Add completedetail which will allow receivers to be designeddeveloped and produced that can be properlyoperational utilizing all available PRN codesdocumented through 63From:PO Resolution: DeferRationale: At the May 08 ICWG, Aerospace presentedsolution for the comment. Will be presented at Nov08 ICWG.Concurrence: Concur11/19/08: Action assigned to Karl Kovach.See Action item #8 against IS-GPS-200. 30-jul-09: 200 POC contacted Karl forproposed text and he will provide someshortly. 13-aug-09: refer to AI #18 forresolution. 10-sept-09: verified that this AIfor PRN expansion is still open.Final To:Rationale:36 Thomas NagleGPCPage: TitlePagesSRationale:Comment: Title pages of document shouldindicate a unique draft version number or date ofPO Resolution: Accept11/19/08: Action assigned to review olderPIRNs – Thomas Davis. 06-sept-09: ICC has13
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