Data Processing for Positioning

The output from the tracking loop is the value of the in-phase arm of the tracking block truncated to the values 1 and −1. Theoretically we could obtain a bit value every ms. However, we deal with noisy and weak signals, so a mean value for 20 ms is computed and truncated to −1 or 1. One navigation bit durates 20 ms. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.