STMi­cro­elec­tron­ics launches multi­band GNSS for au­ton­o­mous driv­ing

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STMi­cro­elec­tron­ics (STM), a global semi­con­duc­tor leader serv­ing cus­tomers across the spec­trum of elec­tron­ics ap­pli­ca­tions, has in­tro­duced the world’s first multi-fre­quency satel­lite-nav­i­ga­tion re­ceiver chipset suit­able for safe­ty­crit­i­cal au­to­mo­tive ap­pli­ca­tions like safer au­ton­o­mous driv­ing and high ac­cu­racy po­si­tion­ing at the decime­tre and cen­time­tre-level for Pre­cise Point Po­si­tion­ing (PPP) and Real Time Kine­mat­ics (RTK) ap­pli­ca­tions.

Tra­di­tional in-car nav­i­ga­tion sys­tems help driv­ers reach their des­ti­na­tions us­ing re­ceivers and com­mer­cial satel­lite ser­vices that al­low po­si­tion­ing ac­cu­rate to within a few me­ters. With in­creas­ing use of au­ton­o­mous sys­tems such as lane-de­par­ture warn­ing (LDW), adap­tive cruise con­trol (ACC), valet park­ing, and auto-pi­lot, greater ac­cu­racy is needed to en­sure safety and re­li­a­bil­ity, in com­bi­na­tion with prox­im­ity sen­sors such as cam­eras, radar, lidar, and oth­ers, to mon­i­tor the driv­ing en­vi­ron­ment au­to­mat­i­cally. Fully self-driv­ing ve­hi­cles of the fu­ture will also de­mand high-ac­cu­racy po­si­tion­ing.

By track­ing satel­lites of all GNSS (Global Nav­i­ga­tion Satel­lite Sys­tem) con­stel­la­tions si­mul­ta­ne­ously on at least 2 of the fre­quen­cies used by each sys­tem (in­stead of one in other prod­ucts),STM’s au­to­mo­tive-qual­ity Te­seo APP (Au­to­mo­tive Pre­cise Po­si­tion­ing) re­ceiver pro­vides high­qual­ity raw GNSS data for PPP and RTK al­go­rithm, which al­lows ac­cu­rate po­si­tion­ing and rapid con­ver­gence time world­wide.

In ad­di­tion to its high ac­cu­racy, the in­dus­try-unique re­ceiver mon­i­tors the in­tegrity of the satel­lite data to alert the sys­tem if ac­cu­racy is de­graded for any rea­son. This per­mits Tier-1 man­u­fac­tur­ers to cer­tify safety-crit­i­cal sys­tems in ac­cor­dance with the au­to­mo­tive in­dus­try func­tional-safety stan­dard, ISO 26262, up to the high­est Au­to­mo­tive Safety In­tegrity Level (ASIL). Te­seo APP also in­te­grates a se­cure mi­cro­con­troller for se­cure sys­tem boot and data-out­put au­then­ti­ca­tion to keep sen­si­tive data safe from at­tack.

Launched along­side Te­seo APP, STM’s Te­seo V chip pro­vides equiv­a­lent multi-fre­quency pre­cise po­si­tion­ing in a sim­pli­fied de­vice for non-safety-crit­i­cal ap­pli­ca­tions where in­tegrity as­sur­ance is not re­quired.

“High-ac­cu­racy satel­lite po­si­tion­ing makes au­ton­o­mous driv­ing safer, smoother, and more re­li­able. Our new Te­seo APP GNSS chip com­bines ex­treme ac­cu­racy and pre­ci­sion with in­dus­try-unique in­tegrity as­sur­ance for use in safety-crit­i­cal ap­pli­ca­tions,” An­to­nio Radaelli, Di­rec­tor, In­fo­tain­ment Busi­ness Unit, STMi­cro­elec­tron­ics, said.

STM is now sup­ply­ing prod­uct sam­ples to lead cus­tomers who are de­vel­op­ing au­ton­o­mous-driv­ing sys­tems ex­pected to ap­pear first in high-end ve­hi­cles to be launched in 2020-21.

Con­ven­tional GNSS-based au­to­mo­tive po­si­tion­ing and nav­i­ga­tion sys­tems use only sin­gle­fre­quency GNSS re­ceivers that op­er­ate in the L1 fre­quency bands avail­able for con­sumer use, and are sub­ject to en­vi­ron­men­tal­lyre­lated er­rors such as mul­ti­path and iono­spheric phase de­lays that im­pair po­si­tional ac­cu­racy. Te­seo APP elim­i­nates these er­rors by track­ing all avail­able GNSS sig­nals in mul­ti­ple fre­quency bands, such as the GPS and GLONASS, Galielo, BeiDou, QZSS, and IRNSS L1, L2, and L5 fre­quency bands, and the Galileo E6 sig­nal that con­tains PPP cor­rec­tion data to al­low world­wide decime­ter-level ac­cu­racy.

Un­til now, GNSS sig­nals con­tain­ing pre­cise-po­si­tion­ing in­for­ma­tion have been re­served for com­mer­cial and gov­ern­ment or­ga­ni­za­tions. Other tech­niques for en­hanc­ing ac­cu­racy have in­cluded ex­pen­sive dif­fer­en­tial sys­tems re­liant on a com­bi­na­tion of ground base-sta­tion sig­nals as well as satel­lite sig­nals, or tech­niques such as Real-Time Kine­mat­ics, which gen­er­ally re­quire a denser ref­er­ence sta­tion net­work.

The new Te­seo chips make high ac­cu­racy af­ford­able for au­ton­o­mous driv­ing through an in­ge­nious com­bi­na­tion of track­ing up to 3 con­stel­la­tions si­mul­ta­ne­ously over 2 fre­quency do­mains. These multi-fre­quency com­bi­na­tions bring re­li­able GNSS iono­spheric and mul­ti­path model­ing in most en­vi­ron­ments, thus al­low­ing ac­cu­rate po­si­tion­ing with faster con­ver­gence time for au­to­mo­tive ap­pli­ca­tions, where tim­ing is crit­i­cal.

STM as a global semi­con­duc­tor leader de­liv­ers in­tel­li­gent and en­ergy-ef­fi­cient prod­ucts and solutions that power the elec­tron­ics at the heart of ev­ery­day life. STM prod­ucts en­able smarter driv­ing and smarter fac­to­ries, cities and homes, along with the next gen­er­a­tion of mo­bile and In­ter­net of Things de­vices.

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