IS-GPS-800D (797938), страница 18
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The S1 sequence is defined by one of the followingfour polynomials:1 + x3 + x6 + x9 + x11Octal 5111,1 + x4 + x8 + x9 + x11Octal 5421,1 + x + x8 + x9 + x11Octal 5403,110IS-GPS-800D24 Sep 2013and1 + x6 + x8 + x10 + x11Octal 6501.The second sequence, S2, is fixed and is defined by polynomial:1 + x9 + x11Octal 5001.Each polynomial generates a sequence using a specified initial condition, e.g., S1(t) and S2(t).The additional L1CO-code sequences are then defined by L1COi(t) = S1(t) ⊕ S2(t) for i = 64 to210. Table 6.3-2 specifies the L1CO-code parameters for PRN signal numbers 64 - 210.
SeeFigure 3.2-2 for a conceptual code generator for these additional L1CO-code sequences.111IS-GPS-800D24 Sep 2013Table 6.3-2. Additional L1CO Overlay Code Parameter Assignments (sheet 1 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Initial 11Symbols(Octal †)Final 11Symbols(Octal †)645111174030352775214565511136641557233316566651111427023716100356675111262725270300075368511107013307340634036951113460140220622765705111137312250156171371511125400607234731777251112004035123551310735111227437241550120374511113401675053532677551110602262520273240765111250210303532205577511103271443176414357851112600327714770243795111046411321556073680511136740572330626718151113040124122010322825111115305351466371683511107471366142127428451111770004117310671NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.112IS-GPS-800D24 Sep 2013Table 6.3-2 Additional L1CO Overlay Code Parameter Assignments (Sheet 2 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Starting 11Symbols(Octal †)Ending 11Symbols(Octal †)855111377205613213273586511117310122161300218751111672120504770631885111133337532460353789511127052543024636209051112713303117221622915111356222601702117392511132453773053626739351113770315606262737945111320222151017312195511135210146346717609651113250241316432600975111211725640473340098511105303310362011769951113021226712460514100542125113120143116441015421156200641506355410254211067104200251161103542104240476005203331045421340210202422162010554211326043117172000NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.113IS-GPS-800D24 Sep 2013Table 6.3-2 Additional L1CO Overlay Code Parameter Assignments (Sheet 3 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Starting 11Symbols(Octal †)Ending 11Symbols(Octal †)106542121420216235426551075421073327362005032010854210504252720231103109542116112431322035311105421272410133737072311154210753052402770023112542137240726300223121135421265210423610172311454211743336224213065115542100131364137715651165421346433540730121111754212300062325233610118542113340145127136021195421217502142361115512054212564022327471166121542130750151312422071225421345524051050267312354213627252213052703124542106173235342236131255421132404521776106512654213506261713113270NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.114IS-GPS-800D24 Sep 2013Table 6.3-2 Additional L1CO Overlay Code Parameter Assignments (Sheet 4 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Starting 11Symbols(Octal †)Ending 11Symbols(Octal †)127542122311300313100401285421111014300520254112954211271077315020673130542137400772303201611315421365235610333014313254211644060710431040133542136350420321502271345421343605273111352313554213076377007063452136542104342536210214511375421334022331173167713854210054336633321650139540324463766132007121405403002535543571330514154030150206021303603142540327462070073616071435403272307132030230114454032601336615670420145540334403247060707071465403131227763464233114754030544124417001705NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.115IS-GPS-800D24 Sep 2013Table 6.3-2 Additional L1CO Overlay Code Parameter Assignments (Sheet 5 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Starting 11Symbols(Octal †)Ending 11Symbols(Octal †)148540320622102016035661495403017617121664316515054033616124524532020151540317403344240401001525403377712772500162715354030432016505573170154540324662131055722001555403166736232044221715654033601014137403133157540327060421232723401585403202230321010133715954031363206533063741160540323313024131532151615403355626631335361716254032205227400713034163540337342114162014731645403211516643771006316554030010041304031102166540321401512345223301675403313601353003252016854030272273725451077NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.116IS-GPS-800D24 Sep 2013Table 6.3-2 Additional L1CO Overlay Code Parameter Assignments (Sheet 6 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Starting 11Symbols(Octal †)Ending 11Symbols(Octal †)169540332641015227113041705403201710753062106117154032505125537501741172540335323473014117741735403064727162151237417454031542010114430473175540321541105305107131765403373414072333377317754032621340712260321178540327111046375725301795403021732373020026718054033503015434573763181540334573010044705701825403375022451515274218354032525205105741142184540301132144205711351855403026517431526145618654031711251132001717187540305523410314235561885403067514141261144018954031706127505732600NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.117IS-GPS-800D24 Sep 2013Table 6.3-2 Additional L1CO Overlay Code Parameter Assignments (Sheet 7 of 7)PRNSignalNo.S1 PolynomialCoefficient(Octal) *(mi, j)S1 InitialCondition(Octal †) **S2 InitialCondition(Octal †) **Starting 11Symbols(Octal †)Ending 11Symbols(Octal †)190540335132257174416761915403113523313204222619254030566027607100231193540305003261376116761945403025417601534162019554033445043030752340196540325423477113534771975403125716760421324119865010211163614273011199650105342411212506742006501142014730053174620165013401226616671110202650107142104261014152036501061320702663262720465012475176633132471205650125720711226300572066501326525331756336420765011250035311031762208650117111744005523172096501270400532757075521065010135222223171145NOTES:* The polynomial coefficient is given as m11, … , m0.
Thus octal 5111 corresponds to thegenerator polynomial 1 + x3 + x6 + x9 + x11.** The initial condition is given as n11, … , n1. (See Figure 3.2-2)†The initial bit value 0 is dropped to obtain 11 symbols. Thus octal 3035 corresponds to 11values 1 1 0 0 0 0 1 1 1 0 1.118IS-GPS-800D24 Sep 20136.3.2 Pre-Operational UseBefore any new signal or group of signals (e.g., L2C, L5, M, L1C, etcetera) is declaredoperational, the availability of and/or the configuration of the broadcast signal or group ofsignals may not comply with all requirements of the relevant IS or ICD. For example, the preoperational broadcast of L2C signals from the IIR-M satellites did not include any NAV orCNAV data as required by IS-GPS-200. Pre-operational use of any new signal or group ofsignals is at the users own risk.6.3.3 Integrated Phase Noise Characteristics.As an aid to user equipment receiver designers, a plot is provided (Figure 6-1) of a typical GPSIII phase noise spectral density for the un-modulated L1C carrier.Reserved for L1C Phase Noise PlotFigure 6-1 Carrier Phase Noise Spectral Density6.4Operational Protocols6.4.1 Lower PRN Numbers Versus Upper PRN NumbersSee IS-GPS-200.6.4.2 PRN Number ConsistencyFor a given satellite, the same PRN number will be assigned to all operational signals (signalsmodulated by standard PRN code with data that indicates the signal health is OK).6.4.3 PRNs 33 and 37See IS-GPS-200.6.4.4 PRNs 33 through 63See IS-GPS-200.119IS-GPS-800D24 Sep 2013.
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