Citation
Abstract
L Introduction il. System Design Considerations In order to test tile compatibility of tile current urdionwtric The Costas loop is designtd to bc operntrd jvith IIW 1310rk system in a IISN environment with suppressed carrier binary Ill Reccivcr in the long loop mode. controlling lhc \’CO input. ph:tse.sltifl keyed (BPSK) signirl]ing and Costas loop carrier the output of which is multi plictl 10 S&sntl for L:sc il; t!:: firs: recovery. n Costw loop has been designed and construcvcd to mixer. The sysiem contlguratims is illustr:ltcti in Fiy. 1. Tl]is Opcr:ltc willl the 13tockIll reccivcr. It 110sbeen tested with the loop $vill provide the Block III wccivcr with !hr o~~tiim t>f Bk>ck III ret’civcr at the Tclcc{>ltllrlltllicatiofls Develo;mwnt Irosking Supprcswd carrier siy:lls. in :Iddilion 10 Ihc cxis[ing Lolwratory (TDL) ml its mcosured performance. with respccl ~:lpilbility of tracking residual corrier si~mrls, In ortk’r 10 c:lrry IL> th)pplcr tracking. IUIS been reported in Ref. 1. This nrlicle OtII tlIC dwired tests. M mentioned in l-?e~.1. of the e:trticsl dcscrihts its ~csign considerations. Its expected performance time possible, the Costjs loop nlodillc:l;ion is d sc:llcd dottll rc~:lrding ste:ldy state PIIWC error under assumed Doppler version of [he carrier tracking loop 10 bc Ilstd in lIIC conditions. rms pltose jitter. and their respective sensitivities Nlultime$abit Telemetry Demodulator and Dctccror (\l TDD) Ivilh respw to wrrinlions in signal. to.noise ratios m discussed. now under developrswnt. In p:wliculflr, this current Ctx[as l{~{~i~ Tlw loop’s expected pull-in time is also given. SysMnl desi!n dcsiSn utilizes a con)plcx mixer which wss tievclopcd in e:lrlicr t.<>l]si~tcr:ltii>lls u,ill tlrsl bc discussed in Section Il. Descriptions projects (Refs. 2 and 3) anti IKSSa b:lndwid!h of lrss tll~n of Iwrdunrt design snd conslructirm w’ill be givers in Scclion 2 X1117. Becdt[se of this inlwrcrrt bondtvi~ilh Iinlit:}litul IIw II 1. I’rtdictcd ptrfornl~nce will he discussed in Sections IV, V, dcsiyled (’ostas loop csn only track si$n~ls havin$ d:lt:l r:llrs :1(11\1’1. up ro I meysymbol per scconJ (\l S1’S).
Details
- Volume
- 42-51
- Published
- June 15, 1979
- Pages
- 113–123
- File Size
- 463.4 KB