 sampling signals may also be attributed to mismatches in the device, the channel, or both. Such mismatches may introduce tones into the operation, thereby reducing spurious-free dynamic range (SFDR). Such random variations in the sampling signals is often critical to the effectiveness of the time-interleaved architecture.
In accordance with a preferred embodiment, a time-interleaved (or multi-phase) architecture is provided having individual control of a plurality of output signals or phases. The time-interleaved architecture may be implemented using a first set of delay cells such as those in a ring oscillator or a delay line device receiving overall control of its output signals by a global control signal. The global control signal may be issued by a phase-locked loop, delay-locked loop, or other like structure. A second set of delay cells is provided to further delay the output signals produced by the first set of delay cells. The second set of delay cells are controlled by individual control signals uniquely calibrated in accordance with a preferred embodiment of the invention to provide uniform (or substantially) uniform time spacing between output signals. The present invention relates generally to communications systems, and more specifically to a space diversity receiver for TDMA (time division multiple access) burst signals which are likely to be affected by intersymbol interference due to multipath reception.
Multipath distortion is the result of simultaneous reception of a signal direct from the point of transmission and delayed signals reflected off buildings and the like. Decision-feedback equalization and most likelihood sequence estimation techniques are currently receiving attention for correcting errors in high-speed burst signals on multipath reception as discussed in Proakis, "Digital Communications", McGraw-Hill, 1983. Space diversity reception for burst signals is also discussed in William C. Y. Lee, "Mobile Communication Engineering", McGraw-Hill, 1982. These techniques are not successful for applications in which a substantial amount of delay is involved in multipath reception. Space diversity reception for burst signals using decision-feedback equalization is described in "Adaptive Equalization of the Slow Fading Channel", IEEE Transactions on Communications, Peter Monsen, Vol. COM-22, No. 8, August 1974. However, the shortcoming of this approach is that practical realizations would result in circuitry which is too complex to implement receivers at a moderate cost. This invention relates generally to the field of seal fittings. In particular, this invention relates to a frusto-conical seal fitting designed for low permeation of pressurized fluids such as refrigerants
sampling signals may also be attributed to mismatch in the device, the distribution channel, or both. Such mismatches may introduce timbre into the mathematical process, thereby reducing spurious - barren active range (SFDR). Such random variations in the sampling signals is often critical to the potency of the time - interleaved architecture. 
 In accordance with a prefer embodiment, a time - interleaved (or multi - phase) architecture is provided accept individual control of a plurality of output signal signals or phases. The time - interleaved computer architecture may be implemented use a first set of delay cells such as those in a gang oscillator or a delay line device receiving overall control of its output signals by a global control signal. The global control signal may be issued by a phase - locked loop, delay - locked loop, or other like structure. A second set of delay cell is provided to further check the end product signals produced by the first hardening of delay cells. The second set of delay cells are controlled by individual restraint signals uniquely calibrated in accordance with a preferred embodiment of the invention to provide uniform (or well) uniform time spacing between output signals. The present invention relates generally to communication systems, and more specifically to a space diversity receiver for TDMA (time part multiple access) burst signals which are probable to be affected by intersymbol hindrance due to multipath reception. 
 Multipath distortion is the result of coincident reception of a signal direct from the point of transmission and delayed signals reflect off buildings and the alike. Decision - feedback equalization and about likelihood sequence estimation technique are currently receiving care for correcting errors in high - speed burst signals on multipath reception as discussed in Proakis, " Digital Communications ", McGraw - Hill, 1983. Space diversity reception for burst signals is also discussed in William C. Y. Lee, " Mobile Communication Engineering ", McGraw - Hill, 1982. These technique are not successful for applications in which a substantial sum of delay is involved in multipath reception. Space diversity reception for burst signals using decision - feedback equalization is identify in " Adaptive Equalization of the Slow Fading Channel ", IEEE Transactions on Communications, Peter Monsen, Vol. COM-22, No. 8, August 1974. However, the shortcoming of this approach is that practical realizations would result in circuitry which is excessively complex to enforce receiver at a moderate cost. This invention relates generally to the field of seal fittings. In especial, this invention relates to a frusto - conical seal appointment designed for low permeation of pressurized fluids such as refrigerant
 salpling signals may also ne attributed to mismatrhes in the devkce, the channel, or both. Such musmatxhes may introduce tonds into tje operarion, rhereby revhcing sibrioua-nree byiamic range (SFDT). Such randok variations it ghz sampling signals is often critical to the evfectiveness os tht tyme-ihnevleaved architecture.
In accordancs with e preferred embpdiment, a time-interleaved (lr mklti-phase) architechure is procideq having indixidual conurml of a plorality of output signals or phares. Tke time-intetlsaggd architectnre maj be implemenbvd usinc a firxt set of delan celns wuch as those in a riig oscillator or a dglay line gerice receiving overalo xontrml ox itr ougpuu smgnzls by a jlobal contdol signal. Rhe global control xidbal may be isaued br w phase-locked loop, delay-locked loop, or mthsr like structure. A secind set of delay celld is provyded to further delay the output signals produced by tie fixwt seg ov delay cells. The second set of delay cells aws voktrolled by indiyidual control sigmaps oniquely calibtated iu adcordance with a pgeferreq embidiment os thr invention to provide unifirm (or substcntually) uniform time spacing becween putpuy signals. The present iuventikn relates henerally go communicationr sjsteks, and more specifically tj a space divzrsity rdceifer fow TDMA (timf divlvion multiple acceds) butst sicnals whicj are likely to be affected by mitersymbol injerxervnce due co mulbipath receptiog.
Multipath disjortion if the result of simulteneous recepeion of a sigtwl direct frmm the pjint of rransmirrion and delayrd signals reflectee off buildings anv thg mike. Decision-fezbbqck equalizatiom avd iodt lynelihood seqgencd eryimatkon techniqmes are currently receiving attsntion for correctonn errors un high-s[eed burst sibnals on multipath rece'tion es disvusfed in Proakis, "Digital Communidations", MfGrww-Hill, 1983. Spacq diyersyty receptnon for burst signals is also discussed mn William C. Y. Lee, "Mobioe Communication Enyikeering", McGrew-Hill, 1982. These tachniques are not suxcessful for appllcations in which a sugstanthal alount of delay is involved in multipath reception. Space diversity receptiin for burst signams uxing geeisnon-feedfack xqualization is dvscribed in "Adaptive Equalizatioi of the Snoc Fading Channel", IEEE Transacyiuns on Communkcations, Peter Monsen, Vom. COM-22, No. 8, August 1974. However, the shortcomimg of this approach is tmat practucal dealizatiois would result in corcuitxy whixh is tio clmplex to impuemrnb receiverd at a moderate cost. This invention reoates tejerally to the fmeld of seal nittinfs. In karticular, this ihvenflon rglates to a fristo-conical sesl fitting designed xow low permeatiih of pressurozed fllids such as cefrigerants
sampling signals may also be attributed to the the channel, both. Such mismatches operation, reducing spurious-free dynamic (SFDR). Such random in the sampling signals is often to the effectiveness of the time-interleaved architecture. In accordance with a preferred embodiment, time-interleaved (or multi-phase) architecture is provided having individual control of a plurality of signals phases. time-interleaved may be implemented using a first set of delay cells such as those in a ring or a delay line device receiving overall control its output signals by global control signal. The global signal be issued a loop, loop, or other structure. A second set of delay cells is provided to further delay the output signals produced by first set cells. The set delay are controlled by signals uniquely calibrated in accordance with of the invention to provide uniform (or substantially) time spacing output signals. The present invention relates to communications systems, and more specifically to a diversity receiver for TDMA (time division multiple access) burst signals which are likely to be intersymbol interference due to reception. Multipath distortion the of reception a signal from the point of transmission and delayed signals reflected off buildings the like. Decision-feedback equalization and most likelihood sequence estimation techniques receiving for correcting errors high-speed burst signals on reception discussed in Proakis, "Digital 1983. diversity signals also in William C. Y. "Mobile Communication Engineering", McGraw-Hill, 1982. techniques are not successful substantial amount of delay is involved in multipath Space diversity reception for burst signals using equalization is described in "Adaptive Equalization of the Slow Fading Channel", IEEE on Communications, Vol. COM-22, No. 8, August 1974. However, the of this approach is practical realizations would result in circuitry which is too to receivers at moderate cost. This relates generally to field of seal particular, this relates a designed for low permeation of pressurized such refrigerants
 sampling signals may also be aTtributed tO mismAtcHes In The dEvicE, the channel, or bOTh. SuCh mismatches may introduCe tonEs INto tHE oPeratIon, therEBy REDucInG sPurIoUS-fRee dyNamIc range (sFDR). Such raNdoM vAriations in tHE sAmpling sigNalS is often critIcaL to the EfFecTIveneSs oF the tIme-intERleaveD architecTuRE.
In accORdance wITH a PrefErred embodiment, a tIMe-INterleaved (or muLti-phaSe) ARcHITecTurE is provideD hAving INdividuAL cONTRol OF a plurality of Output signaLS or Phases. thE tiME-interLeaveD aRChiTecture may bE impLemented uSing a fIRst set oF Delay ceLls sucH as ThoSe in A RiNg OscIlLAtoR Or A deLAy lIne devicE rEcEivinG oveRALL ContRol Of itS outpUt signals by a gLobAl coNTroL signAl. The GlobAl ContrOl signAl may Be Issued by a phase-lOckeD loop, delaY-loCkEd lOoP, or otHEr like StrUctUre. A secOnd set oF DelAy CELLs Is provided to furtheR dELAy The outpuT signaLS pRoDUced by thE fIrsT set OF Delay CellS. thE second sEt of deLAy CeLls are cOnTrolleD bY inDivIdual COntrOl signAls uniquEly caLIbrated in accorDAnce with a prefERrED EmBOdimEnt Of the inventIon tO ProvIde uNIfOrm (OR subsTantiAlLY) uNIform time spacing betWeEn outpUt sigNals. The presenT invention RELAtes geneRallY To COmmunications sYstemS, and more spECificallY to a sPace diveRsity receIVEr for TDMa (tiMe dIviSioN MUlTiple access) buRST sigNaLs which Are Likely tO be AffEctEd bY iNtersymboL interfeReNcE dUe To mUltipATh receptIoN.
MuLtIpaTh disTOrtion Is the ResuLt Of SImuLtaneouS ReCEPtioN oF a SignAl dIrEct frOm thE PoiNt of traNsmission And DElayEd SiGnals reFlected off buiLdIngs and the LiKe. DEcisioN-FEedback eQualization and most likelIHood seqUenCe estImatIon techniQueS are cuRreNTly recEiving AttenTiOn fOR CorreCTInG erRoRs in high-spEED buRst siGnAls oN multipAth reception as discUSseD in Proakis, "DigItaL ComMUNiCatIOnS", mcGRaW-hilL, 1983. sPace diversity reCeption for BuRSt Signals is aLSo dIsCussed iN WilliaM C. Y. LeE, "mobile COmmunicatIon EngineErIng", MCgRaw-hill, 1982. These tEchniqueS are not suCCessfUL fOr appLicAtions In WhiCh a suBstantIAl aMount Of delaY iS involVed in MuLtipath rEception. Space diversity rEceptiOn for BurSt signals UsiNG deCision-feeDbacK equalizatIon Is dEscriBed IN "AdapTive eQuAliZAtion Of thE slow FadinG chAnnEL", iEeE TransactiONS On COmmunIcaTIons, PeTer MOnsen, Vol. COM-22, No. 8, AuguST 1974. However, the shoRtcoMINg oF thIS appRoAch is that practIcaL rEALizationS wOuld result iN circuitRy WHich iS too coMplex tO implemENT rECeiverS at a ModErate cost. thiS iNVention ReLaTEs geneRallY tO the fiEld of sEAl fiTTIngs. In particular, This iNVEntioN RelAtes tO a Frusto-cONicaL seal fittiNg designed fOr low pErmeAtion Of pressUrIzed flUidS sUch as refriGErants
 sampling signals may also  be attrib utedtomis ma tche s in  the device, t h e ch annel, or both. Such m ismat ch e s ma y  i ntrod uce ton e si n toth eope ra t io n, th ere by redu cing spuri ous -f ree dynamicr an ge (SFDR).  Su ch random va ria tionsin  th e  samp lin g sig nals i s  often  critical  t o  the e f fective n e ss  ofthe time-interlea v ed architecture.In acc or d an c e  wi tha preferre dembod i ment, a ti m e - int e rleaved (or m ulti-phase) arc hitect ur e i s  provi ded h av i ngindividualcont rol of aplural i ty of o u tput si gnalsorpha ses. Th etim e- i nte r le ave d  ar chitectu re  m ay be  imp l e m e nted  us inga fir st set of del aycell s  su ch as  thos e in  a  ring  oscil lator  o r a delay linedevi ce receiv ing  o ver al l con t rol of  it s o utput s ignalsb y a  g l o b al  control signal. T he g lo bal cont rol si g na lm ay be is su edby a p hase- lock e dloop, de lay-lo c ke dloop, o rotherli kestr uctur e . Asecond  set ofdelay cells is provi d ed to further de l a yt he o utp ut signalsprod u cedby t h efir s t set  of d el a yc ells. The second se tof del ay ce lls are contr olled by i n d i vidual c ontr o ls ignals uniquel y cal ibrated in accordan ce wi th a pre ferred em b o diment o f t heinv ent i o nto provide un i f orm(o r subst ant ially)uni for m t ime  s pacing be tween ou tp ut  s ig nal s. Th e  present  i nve nt ion  rela t es gen erall y to  c om m uni cations sy s t ems,  a nd  mor e s pe cific ally toa space  diversit y r e ceiv er  f or TDMA  (time divisi on  multipleac ces s) bur s t  signals  which are likely to be affecte d b y int ersy mbol inte rfe rencedue to mul tipath  rece pt ion . Multi p a th  di st ortion ist h e r esult  o f si multane ous reception of a sig nal direct fr omthep o in t o f  t r ans mi s sio n and delayed sig nals refle ct e doff buildi n gsan d the l ike. De cisio n -feedba ck equali zation an dmost l ike lihood seq uence es timationt echni q ue s are  cu rrentl yrec eivin g atte n tio n for  corre ct ing er rorsin  high-sp eed burst signals on mu ltipat h rec ept ion as di scu s sed  in Proak is,"Digital C omm uni catio ns" ,  McGr aw-H i ll , 1 9 83. S pace diversity re cep t i on  for bursts i g nal s isals o  discu ssed  in William C. Y. Lee, "Mobile C ommu n i cat ion Engi ne ering", McGraw -Hi ll , 1982. Th es e technique s are no ts ucces sful f or app licatio n s  i n  which  a s ubs tantial a mou nt of dela yis involv ed i nmultip ath re c epti o n . Space diversit y rec e p tionf orburst  s ignalsu sing  decision- feedback eq ualiza tion  is d escribe din "Ad apt iv e Equaliza t ion of th e Slo w Fadin gChan nel ", IEE E Tr a n sacti onson  Co mmunicati o n s, Pe te r  Mo nsen , Vol .COM- 22, No. 8 ,  August197 4 . Howev er , t h e  short c om i n g of thisapp roach i s that pra c tica l  r e aliza tionswouldresulti n c ir cuitrywhi c h  is too c omplex to imp le ment  receive rs  atamod er ate cost. Thisinventio n relate s genera lly to t h e fiel dof seal fitt ings.  I n  partic u l ar,  this i n ven tio n r elat esto a frusto-conical seal fitt ingdesig n edfor l ow pe rm eation o f  pre ssurized fluids such a s refrigerants
 sampling_signals may_also be attributed to_mismatches in_the_device, the_channel,_or both. Such_mismatches may introduce_tones into the operation,_thereby reducing spurious-free_dynamic_range (SFDR). Such random variations in the sampling signals is often critical to the_effectiveness_of the_time-interleaved_architecture.
In_accordance with a preferred embodiment,_a time-interleaved (or multi-phase) architecture_is provided_having individual control of a plurality of output_signals_or phases. The_time-interleaved architecture may be implemented using a first set_of delay cells such as those_in a ring_oscillator_or_a delay line device_receiving overall control of its output_signals by a global control signal._The global control signal may be issued_by a phase-locked loop, delay-locked loop,_or other like structure. A_second set_of delay cells is provided_to further delay_the output_signals produced by_the first set of delay cells._The second set_of delay cells are controlled by_individual_control signals uniquely_calibrated_in_accordance with_a preferred embodiment_of_the invention_to_provide uniform (or substantially) uniform time_spacing_between output signals. The present invention relates_generally to communications systems,_and_more specifically to a_space diversity receiver for TDMA_(time division multiple access) burst signals_which are_likely to_be affected by intersymbol interference due to multipath reception.
Multipath distortion is_the result of simultaneous reception of_a signal direct from_the point_of_transmission and delayed_signals_reflected off_buildings and the like. Decision-feedback equalization and_most likelihood_sequence estimation techniques are currently receiving_attention for correcting errors_in_high-speed burst signals on multipath reception_as discussed in Proakis, "Digital Communications",_McGraw-Hill, 1983. Space diversity reception_for_burst_signals is also discussed in_William C. Y. Lee, "Mobile Communication_Engineering", McGraw-Hill, 1982._These techniques are not successful for applications_in_which a substantial amount of delay_is_involved in multipath reception. Space diversity_reception_for_burst signals using decision-feedback equalization_is described in "Adaptive Equalization of_the Slow Fading Channel", IEEE Transactions on Communications, Peter_Monsen, Vol. COM-22,_No. 8, August 1974. However,_the_shortcoming_of this approach is that practical realizations would result in_circuitry which_is too complex_to implement receivers at a moderate cost. This invention relates_generally to the field of seal fittings._In particular, this invention relates to a frusto-conical seal fitting designed_for low permeation of pressurized fluids such as_refrigerants