Tag Archives: Coherence

Coherence in GNSS: A Critical Consideration When Testing and Simulating

Man using mobile phone with GPS

Man using mobile phone with GPSModern GPS integrations come with antennas for controlled reception patterning to counter the testing with typical jamming or interference sources not giving you the most accurate results. Nonetheless, you will require using modernized GPS equipment that has the technology to output signals that accurately simulate the antenna electronics of the GPS receiver. One of such equipment is the wavefront generator simulator with which the jamming source can now displace the signals in coherence with the expected reception pattern of the antenna.

Why in Coherence?

Coherence is a critical factor whenever you are testing global navigation satellite systems. That is so because using extended integration times will reduce the noise when transmitting navigation messages. You will require coherence considering the power consumption requirements, noise conditions, signal acquisition times, and odds of signal detection of your GPS equipment.

Coherent Integration to Increase Accuracy

The longer your GPS coherent integration time is, the higher the chances of having better signal detection and fewer false alarms are. However, these extended integrations reduce the acquisition time since the GPS receiver will linger, searching for the transmitted signal. Nonetheless, if you have set your GPS in a tracking mode, you can use coherent integration to increase the accuracy of signal transmission and reception.

Tracking Weak Signals

Indoor environments pose a significant risk in reducing the carrier-to-noise ratio of signals that are penetrating through the building’s walls. Low CNR values present GNSS receivers with the challenge of having highly-optimized signal acquisition sensors with advanced tracking functions to get accurate results.

Using GNSS receivers indoors no longer has to be a limitation that hinders your application of GPS in your industry. With the right jamming simulator, you can determine how best to optimize signal displacement to be in coherence with your expected reception pattern of the GNSS antenna. Moreover, modernized GPS will provide you with higher chances of achieving accurate indoor positioning.