Survey and Mapping

East Meets West: Hemisphere GNSS’s New Era
February 19, 2013

East Meets West: Hemisphere GNSS’s New Era

Xinping Guo, president and chairman, Beijing UniStrong

Although not on the scale or at the strategic level of China National Offshore Oil Corporation’s takeover of Canada’s Nexen Inc., the recent acquisition of the Precise Products business of Hemisphere GPS by Beijing UniStrong Science & Technology Co. Ltd. marks a notable achievement in the GNSS world — the acquisition of a North American manufacturer with core GNSS receiver intellectual property by a Chinese enterprise.

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By Inside GNSS
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Markets and Multi-Frequency GNSS

Markets and Multi-Frequency GNSS

FIGURE 1: Proposal to have a single chip GNSS receiver with additional pins to allow for the inclusion of an additional radio

Q: What will limit the spread of multi-frequency GNSS receivers into the mass market?

A: To set the scene, we need to define our terms of reference. By multi-frequency we mean receivers that operate with navigation signals in more than just the standard upper L-band from about 1560–1610 MHz where we find GPS L1, Galileo E1, Compass B1, and GLONASS L1. The obvious additional frequency is the lower L-band, from about 1170 to 1300 MHz, where again the same four constellations have signals.

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By Inside GNSS
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