Method and system for characterizing a radio channel of a wireless network using variability of synchronization

摘要

A speed parameter or channel quality parameter are determined in a mobile device based on variation in frequency offset measurement. A higher variation in the frequency offset measurement reflects a poorer channel quality and a higher speed; a lower variation in the frequency offset measurement reflects a better channel quality and a lower speed. The parameter(s) may be fed back to the system and used, for example, to make adaptive modulation and coding decisions.

主权项

1. A method comprising:
receiving a signal over a wireless communications channel; making a plurality of frequency offset measurements in respect of the signal; estimating a PDF of the frequency offset measurements;determining at least one of a channel quality parameter and a speed parameter as a function of the PDF;
determining the measure of variation from the PDF.