Inside GNSS Media & Research

MAR-APR 2018

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www.insidegnss.com M A R C H / A P R I L 2 0 1 8 Inside GNSS 15 lation, now means reduced multipath and ionospheric interference, improv- ing positioning in urban and other environments. "We are working with a number of handset vendors, Samsung in particu- lar, to bring multi-constellation and multi-frequency capabilities to your next smartphone," said del Castillo. "The BCM47755 provides a high level of accuracy with minimal power con- sumption and footprint, and is ca- pable of enabling an entirely new set of high-precision LBS applications." These include lane-level vehicle navi- gation, advanced gaming apps, mobile augmented reality, car-hailing applica- tions, driving assistance for cars, drone guidance, and many others that have yet to be imagined. Del Castillo said the decision to go dual-frequency was an easy one to make. "Once we were sure that the cost increase was going to be tolerable and the technical benefits would be far greater than the added cost, we forged ahead quickly. Of course we were moving into unexplored territory for a mass-market chip. The development process was extensive and it involved a substantial chip revision. "A major challenge was always go- ing to be the ten-fold increase in complexity of L5/E5 signals, and the fine-tuning of the internal phase de- lays between L1/E1 signals and L5/ E5 signals. Also, there was the need for additional memory and computa- tional resources, while reducing power consumption. And we had to do all of this with a minimal cost impact for our customers." "Bringing in Galileo and, most im- portantly, implementing the dual- frequency support has absolutely paid off," del Castillo said. "The benefits " OUR MOTIVATION HAS ALWAYS BEEN ACCURACY AND YIELD IMPROVEMENTS IN CHALLENGING URBAN ENVIRONMENTS, WHERE OUR CUSTOMERS HAVE CONSTANTLY PUSHED US TO KEEP IMPROVING." LINKING SPACE TO USER NEEDS Manuel del Castillo Broadcom Associate Director for GNSS Product Marketing Photo courtesy of GSA. for our customers start, of course, with the performance improvement, delivering re- liable sub-meter accuracy even in difficult environ- ments. But for Broadcom itself, supporting Galileo in E1 and in E5 means we are now clear leaders in the innovation race, and we are benefiting from joint actions with the GSA and working in partnership with ESA." Not Standing Still Competitors beware; the gang at Broadcom shows no signs of resting on their laurels. In another example of innovative thinking, the company has recently partnered with Google to host some location-based applications within its GNSS chipsets. Activity recognition is one such application that uses smartphone sensors to de- termine what the user is doing, i.e. walking, biking, driving, etc. The ap- plication can run on the smartphone's own applications processor, which uses quite a bit of power, or, now, it can be pushed down to a low-power processor in an onboard Broadcom GNSS chip. Del Castillo said Broadcom is intent on staying smart, harnessing its multi- constellation and multi-frequency GNSS technologies to maintain and increase its advantage over all com- petitors. "We see further refinements coming in our E5 implementation, ultimately allowing us to deliver even higher accuracy for newer and even more exciting applications. As long as we keep moving the innovation bar higher and higher, we believe we can stay a step ahead of the competition, and the ultimate winner will be the GNSS user."

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