| 摘要 |
<p>The present invention pertains to the field of radio-navigation and essentially relates to digital correlators intended for receivers that receive pseudo-noise signals from the GPS and GLONASS satellite radio-navigation systems, and that ensure the reception and the correlation processing of the signals C/A of the codes of said systems within a frequency range L1/F1. This invention relates to a digital correlator for such a receiver, wherein said correlator ensures a reliable frequency division of the signals from the GLONASS system due to a special approximation of the sine and cosine of the intermediate frequency. Thanks to this approximation, it is possible to reach the level of unwanted harmonic components required for a reliable frequency division of the GLONASS signals, and to simplify the realisation of the digital correlator units.</p> |
