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US 8,526,421 B2Granted
Arrangement and approach for time slot index synchronization for wireless communications
AssigneeNXP B.V.
InventorMing Gong
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Abstract
The time slot index for wireless signals is synchronized using an approach that facilitates rapid synchronization acquisition and tracking synchronization recovery. According to an example embodiment, a synchronization circuit (e.g., 300) uses data in symbols of a particular signal frame (e.g., 120) to set a time slot index synchronization characteristic for an acquired wireless signal, and further to track time slot index synchronization during processing of the signal.
Claims12
A synchronizing circuit arrangement for processing wireless signals via time slot index synchronization, the synchronizing circuit arrangement comprising:
- a receiver circuit to receive wireless signals from a remote wireless transmitter, the wireless signals including signal frames with a plurality of sequential time slots in each frame, and to process the wireless signals in accordance with a synchronization condition;
- a time slot index synchronizer circuit to
- detect a beacon at the front of a time slot in a signal frame and use the beacon to set the synchronization condition for the received signal frame,
- use data in symbols that follow the beacon in the time slot to fine tune the set synchronization condition,
- detect a time slot index synchronization failure as a function of a quality characteristic of a sub-channel of one of the received signal frames,
- in response to detecting a time slot index synchronization failure in a signal frame, controlling the receiver circuit to resynchronize the time slots;
- and
- the synchronizer circuit operates in a synchronization acquisition phase by detecting the time slot index,
- setting the time slot index as acquired in response to a time slot index of “0” and a check result of decoded data from the signal frame being correct, and entering a tracking phase, and
- setting the time slot index as not acquired and continuing to operate in an acquisition phase in response to a check result of decoded data from the signal frame being incorrect.
7 more elements
Dependencies are inferred from the claim text.