1、信号体制NAVSTAR GPS信号体制GLONASS信号体制表6.4 ( )s tsf( ,)BOC n m12nnmnm1n241nnm2n0( )cos(2)sccccS tA C tD tStf tTTT( )sgn(2)cSS tsinf tBOC定义和特性 0( )cos(2)sccccS tA C tD tStf tTTT( )sgn(2)cSS tsinf tA( )C ( )D ( )cSsf( )sign 0f0 改进的改进的BOC调制调制AltBOC（Alternative Binary Offset Carrier ）的基本思想和处理方法同标准的基本思想和处理方法同标准B
2、OC调调制类似，只是副载波变为复指数形式，即制类似，只是副载波变为复指数形式，即 这这时时，AltBOC调制后信号的频谱不再是分裂开的调制后信号的频谱不再是分裂开的两部分，而是整体单侧偏移。两部分，而是整体单侧偏移。( )sgn(2)sgncos(2)cssS tsinf tjf t 0sgn(2)sinf t0sgncos(2)f t12(,)MBOC m m1m11.023mMHz2m21.023mMHz1(,1)BOC m/n m(10,5)BOC(14,2)BOC(10,5)BOC(10,5)BOC(10)BPSK(10,5)BOC(10)BPSK( , )BOC n n4sf6sf1
3、0sf20sf/m n/n m4 /n m(10,5)BOC(10)BPSK(10)BPSK(10,5)BOC( ,)BOC n m (6,1,1/11)MBOC(6,1,1/11)MBOC(6,1,1/11)MBOC(1,1)BOC(6,1)BOC(1,1)BOC(2,1)BOCF/NAV帧的内容 ieoet图7.3。oe图7.4s tt604800s302400ts604800s=-stoet ttis0=+isM Mnt3=/isa(7.5) 0= -sinM E eE0000-1sin=+1-sin+sin=+sin =1,2,n=iineMEMM eMEM eEiE EL(7.6)0
4、00000=arctan2 sin,cos1-sincos- =arctan2,1-cos1-coseEE eeEeEoosr= + (7.8) oosu0=1-cos+sin2+cos2=+sin2+cos2oosnrcoosusucraeECCuCC(7.9)(7.10)=cos,=sin,=0oooooooosososososososxruyruz=,=eeoiioeso osiso osrC r rC r(7.11)(7.12)i0=-+ieoedt tt &0= +sin2+cos2disici iit CC&(2.15)得(7.13)=0eoeoeoi，cossinsinsinco
5、scossinsincoscossincoscoscossincoscossinsinsinsincossinsinsinsincoscosCcoscoscos sinsin sinsincos cossin cos0sincoseoiiCiiii(7.14)coscos sinsincos cossinooososeooesososoosxyirxyiyi(2.94)(2.95)=,=eeiiieebiibibe ebrC r rC r00000000cos()sin()0sin()cos()0001cos()sin()0sin()cos()0001ieieeiieieieieieieiet
6、tttCttttttttCtttt (7.15)0t0000cos()cos sin()sin()cos cos()sinooosiestosiestiooisosiestosiestoosxttyittrxttyittyi(2.35)stt=C r &(7.16)(7.17)0+=1-cosisnEeE&sin=sinEE&(7.18)(7.19)0=sin+2cos2-sin2= 1+2cos2-2sin2ooskkrsrcoosusucraeEECCuCC &=cos-sin=sin+cos=0ooooooososososososooooooososososososoosxrur uuy
7、rur uuz&(7.20)(7.21)=-die &= +2cos2 -sin2disici iCC & &iex coscos sin +isin sinsin +y cos cosvx sincos cosisin cos-x cos +y cos sinsincos07.22oooooosososososeoooooesosososdososooososiyixiiyiiyi iyi-y+y-&000000cos()cos sin()sin sin()sin()cos cos()sin cos()sincosoooosiestosiestosiestioooisosiestosiest
8、osiestooososdxttyittiyittvxttyittiyittyi iyix&0000sin()cos cos()cos()cos sin() (7.23)0ooosiestosiestooosiestosiestttyittxttyitt(7.24)21=+-+-2=+-eeeeesstesoeesoestoeesoestoeeeeesstesoeesoestoertrtvtttatttvtvtattt(2.94), (2.95)eeiiieebiibibe ebrC rrC r()() (2.96)eeiiiebiibie ibiieeeibeebieebvCvvC v r
9、r r r00000000cos()sin()0sin()cos()0001cos()sin()0sin()cos()0001ieieeiieieieieieieiettttCttttttttCtttt 表7.2 1 =m R( )= m=0, 1,2, NkmNN 2012( ) 0,1rrif xcc xc xc xc21rN 0123x 104050001000015000m序列自相关1.6378 1.6381.6382 1.6384 1.6386 1.6388x 104050001000015000m序列自相关 0123x 104-2000200400m1与 m2互 相 关00.511
10、.52x 10402000400060008000m3与 m6互 相 关050001000015000200000200040006000800010000m4与 m5互 相 关 max|( )|R122221 r|( )|21 4rrRabr为奇数为偶数且不是 的倍数 665212118653( )1( )1( ) ( )1F xxxG xxxxxrF x G xxxxxxx21rN 0123x 104050001000015000gol d1 自相关1.63751.6381.63851.6391.6395x 104050001000015000gol d1 自相关00.511.522.53
11、3.5x 104-400-2000200400gol d1 与gol d3互相关 ( )ut t( )()stt( )( )( ( )()sutc t ttt( ) t (, )( )( )r ttI tT tc( )I t( )T t ( )( )(, )( )()( )( )( )sutr ttct tttcI tcT tt( )I t( )T t( ) t( ) t(, )r tt( )( )()sut ttt和 ( )()( )( )sttI tT t、c( )sctITucrt( )ut t( )()stt( )ut t( )(30) 0.020() 0.001 ( )1023sCP
12、tTOWwbcs周内时（6S一跳）字，比特（20ms）比特内C/A码周期、码相位( ) st( ) st( )( )( ( )()sutc t ttt滞后C/A码（L）超前C/A码（E）即时C/A码（P）cp接收的卫星信号 相位差本地参考信号 ( )( )( )jjkkkkkkttt( )( )kkSittjkNkj(t1)= k(t1) - kj(t1) = Nkj + kj(t1) )(0tSj)(ijtSi)(Int0N0N011( )( )jjjjkkikikR tR tcc&111( )( )( )( )jjjjjkkikikikikR tR tt tR tccc&2111( )(
13、)( )( )( )jjjjjkkikikikikiR tR t R tR tt tccc&11( )( ) 1( )1( )( )( )( )jjjjjkikikikikiijjkkiftR tR tfR tt tft tcccNt&( )( )( )jjjjkkikikiNtNtt 11( )( ) 1( )1( )( )( )jjjjjjkkikikikikiiNtRtRtcRtttcttcc&11( )( ) 1( )1( )( )( )( )( )( )npjjjjjkikikikikiijjjjkkikikiv tR tR tcR tt tc t tccNttt &jknjkp周跳
14、T 周跳T 2211LLLL44332210iiiittatatataai)(44332210周跳数iitiiiitNtatatataa231234234itiiiaa ta ta t& 残差（周） 时间 （周） 0.00 100.002 -100.00 SV12-SV15 jkNjkNjkN但是这里是哪里但是这里是哪里?你就在这里你就在这里.我在哪?,222,()()()()()()()()()()()()jjiiiisasasast jst jisjiaisjiaCjrciiiiiiisjiaisjiasasast jst jst jsaisjiasarctttttyyxx ttttz t
15、z tt %rrrr(7.168)ipiarrcP(7.174)111222()()()()PiiPiasaiaCCiiPPsaiaiaCCiiPiaiasaPPsarcrcCnCnnx txyyttzztMM% (7.176),() () (7.175)PiiP TiiPPCjisjst jiaisjst jiarcrtrrtr%11112222iiPiaiaiiiiaiarciaiiiiaiarciannnniiiiaiarciarryxzyxzyxz (7.177)(7.34),1,1,1,2,2,2, , , ,111iPiPiPasxasyasziPiPiPasxasxasxiiPi
16、PiPas n xas n xas n xuuuuuuGuuu ,-=-iiiiis jst jiasais jst jiasaias jiiTjis jst jiasartrtrtrturtrt1,1,1,1,2,2,2,2,n, , , ,11=(,)1(7.50)nnnnas Nas Eas Dea NnnnnasNasEasDneaEnearcneaDnnnasnNasnEasnDrcuuuruuurGrruuuMMMMM11122rc3344 ()(7.178) ()PCCiiPPiasaiaCCiPPrcsaCCPCCr trGt%210 (7.179) (),()njijiasa
17、rcsar tt(7.180)11122 ()() ()PCCiiPPTTiasaiaCCiiiPrcsarcPCnCnr trG GGt%M%(7.181)0/c n+C1111122 ()() ()PCCiiPPTTiasaiaCCiiiPrcsarcPCnCnrtrG CGG Ct%M%(7.182) , () (7.183)PiP TiiPPCjas jisjst jiarcuvtv%&11122 ()() ()PCCiiPPTTiasaiaCCiiiPrcsarcPCnCnvtvG GGt%&%&M%&(7.184)1112211122 ()() ()()() ()PCCeePPTT
18、easaeaCCeeePrcsarcPCnCnPCCePPTTeaCCeeeeeasaPrcrcsaPCnCnrtG GGtG GGtt%&M%&%&M%&(7.185)(7.186),TeePIePIePPesjesjst jst jst jst jCjeeaeearceePeTIeePeePPesjst jesjst jst jCjas jeieeaie earcCtrtrCtrtruCtvtrtvr $%$%&,() ()()PeeP TeepPCjesjst jeaesjst jearcie jPeP TeePPCjas jesjst jearcie jrtrrtrut%&222sin
19、1tancoseebbEbbeebbeebeeebebbEbbzLeRLhyxxyhRLL(2.71) (2.41)vC v(2.99)eeareeav,aaaLhneavneCsincossinsincossincos0coscoscossinsinsincossincoscossinsincoscossincos0sinbbbbbnebbbbbbbbbbbbnebbbbbbbLLLCLLLLLCLLLL ：, (7.187)aieaiaeaieaieiiaeaeearcrcrcrcrcrcLrrhvvxxxv& 3123,13,1333,13,11,31,31,31,30000000000
20、10000nnFF0001000000001000000001000000000000000000000000000000000100000000iFeFiF.1212(,) (7.196)CCCnCCCnGzLML,iG kH,ias ju,eas ju,eG kH,1,1,1,2,2,2, , , ,1,1,1,2,2,1, ,000100001000010H0000100001000iiiasxasyasziiiasxasyasziiias n xas n yas n ziG Kiiiasxasyasziiiasxasyaszias n xas nuuuuuuuuuuuuuuuuuMMM
21、MMMMMMMMMMMMM,1,(7.201)01iiyaszu(7.204),1,1,1,2,2,2, , , ,1,1,1,2,2,2, ,0001000010000100000100001000nnnLasNasEasDnnnLasNasEasDnnnLas n Nas n Eas n DiG knnnasNasEasDnnnasNasEasDnas n Nah uh uuh uh uuh uh uuHuuuuuuuuMMMMMMMMMMMMMMMM, , ,01knns n Eas n Dx xu$.21,122,223,327,7 (7.206)xxyyzzprcprcPPPP表7.6表7.7谢谢2022年1月28日
