Methods and systems for synchronization with multiple frequency offsets and known timing relationships
AssigneeEricsson Inc.
InventorsCarsten Hoirup, Amie Pendleton Palmer
Life of this patent
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Abstract
Methods and systems are provided which store frequency settings before switching frequencies, for example, before assignment to the traffic channel when switching between a ground station and another mobile station), thus, making it possible to recall the previous frequency setting and then only perform a second pass of the synchronization process or no synchronization at all. By storing the frequency setting, either as an offset to a given frequency or as an absolute frequency for each system to be monitored, the stored frequency setting can be re-used when subsequently monitoring a system.
Claims14
A method of rapidly synchronizing a wireless device, utilizing a single reference frequency, to at least two received signals, the method comprising the steps of:
- determining a time varying phase offset between a first received signal from a first source device and the single reference frequency so as to provide a first received signal phase offset;
- determining a time varying phase offset between a second received signal from a second source device and the single reference frequency so as to provide a second received signal phase offset;
- synchronizing to the first received signal utilizing the first received signal phase offset by applying the first phase offset to the single reference frequency;
- and
- synchronizing to the second received signal by applying the second phase offset to the single reference frequency.
A wireless device which utilizes a single reference frequency to synchronize to at least two received signals, comprising:
- means for determining a time varying phase offset between a first received signal from a first source device and the single reference frequency so as to provide a first received signal phase offset;
- means for determining a time varying phase offset between a second received signal from a second source device and the single reference frequency so as to provide a second received signal phase offset;
- means for synchronizing to the first received signal utilizing the first received signal phase offset by applying the first phase offset to the single reference frequency;
- and
- means for synchronizing to the second received signal by applying the second phase offset to the single reference frequency.
Dependencies are inferred from the claim text.