| 摘要 |
<p>A method for automatically reducing carrier acquisition and tracking thresholds for carriers received in orbit by a receiver accessing an orbital navigator inside or outside the receiver, wherein said receiver comprises at least one phase loop. The phase loop is used for carrier acquisition and/or tracking and 'pushed' by a fine speed aid, and compensates for the error between the actual speed and the computed speed. The carrier Doppler frequency search is carried out around a frequency prediction maintained by the fine speed aid from the orbital navigator.</p> |
