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The latest generation of Global Navigation Satellite System (GNSS) and Global Positioning System (GPS) signals are evolving from single-band to dual-band technology

The background to the migration from L1 to L1/L5 or L1/L2 signals is that as GNSS receiver technology continues to advance, multiband receivers are becoming more attractive and viable for a growing number of applications. Advantages of multi-band technology include higher signal availability, higher positional accuracy, improved signal security, and fast signal acquisition.

The advantages of multi-band technology include higher signal availability, better positioning accuracy, improved signal security and fast signal capture.

In terms of use cases, L1/L5 and L1/L2 are suitable for high-precision positioning equipment in a variety of applications, including autonomous agricultural machinery, surveying and construction equipment. For example, in the field of ground robotics, L1/L2 has advantages over L1/L5, especially when using RTK (real-time kinematic) technology, because of L2's wider global coverage. In terms of precision timing, with the advent of 5G services that require greater time accuracy, devices require a second GNSS band, and L1/L2 band combinations have been adopted to provide more accurate timing information.

In terms of pros and cons, L1/L5 receivers have an advantage over the L1 band when dealing with weak signals, helping to ensure continuous positioning services in challenging environments with guaranteed positioning accuracy
L1/L5 receivers can help ensure continuous positioning services in challenging environments and guarantee positional accuracy. However, dual-band L1/L5 receivers consume more power than single-band receivers, which can pose a challenge for battery-powered devices. In addition, the L5 signal is not yet fully operational, and users need to consider its operational status when designing products based on the L5 band.

When choosing between L1/L2 and L1/L5, it is important to consider specific application scenarios and requirements; L1/L2 receivers perform well in RTK applications, while L1/L5 performs better in multipath effect mitigation and weak signal environments.
As technology evolves, it is expected that most applications will transition towards multi-band technology in the coming years.

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