Accurate Timing Distribution by HF Radio

High-frequency (HF) sound signals are extensively used in various communication and navigation systems. However, obtaining an accurate and absolute time reference for these signals can be challenging because of multiple interference factors and the unpredictable propagation of HF signals. Accurate time referencing is crucial for reliable communication, localization, and navigation applications. The existing methods for determining absolute time reference often rely on a single source of input, leading to inaccuracies because HF signals can be distorted by their interaction with the environment. In addition, these methods do not account for the relative delay and propagation modes of the signals, which can provide significant insights into their behaviors. These shortcomings necessitate a more refined and intelligent approach to time referencing in HF signals.

Technology Description

This advancement is a procedure for determining an absolute time reference for high-frequency (HF) sounding signals. It includes transmitting a reference signal from a location, alongside a sounding signal. Both of these signals are then received at a second location. The innovative factor lies in utilizing the received signals to determine relative delay of the sounding signal to the reference signal and ascertain the propagation mode based on this delay. What sets this technology apart is the ability to interpret the absolute time reference on the basis of the identified propagation mode. Existing systems do not have this nuanced approach for calculating the precise timing reference by correlating sounding signals with reference signals. This approach results in a more accurate reading and understanding of high-frequency signal behavior.