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US 7,248,624 B2Granted
Bit synchronization in a communications device
AssigneeQUALCOMM Incorporated
InventorKai Tang
Life of this patent
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Abstract
Systems and techniques are disclosed relating to communications. The systems and techniques involve the synchronizing to a signal having a plurality of bits by computing energy for a plurality of different phase offset signal portions, generating a ratio from the signal portion with the highest computed energy and the signal portion with the second highest computed energy, and comparing the ratio to a threshold to determine whether the signal portion with the highest computed energy can be used to determine bit timing.
Claims6
A communications apparatus, comprising;
- a receiver section configured to receive a signal having a plurality of bits;
- a synchronization module coupled to the receiver section, said synchronization module configured to compute energy for a plurality of different phase offset signal portions, generate a ratio from the signal portion with the highest computed energy and the signal portion with the second highest computed energy, and compare the ratio to a threshold to determine whether the signal portion with the highest computed energy can be used to determine bit timing;
- wherein each of the bits has a bit period, and each of the signal portions comprises a plurality of sub-portions, each of the sub-portions having a time period equal to the bit period, and wherein the synchronization module is further configured to determine the bit timing by synchronizing to the sub-portions of the signal portion with the highest computed energy if the ratio exceeds the threshold;
- and
- a position processor, wherein the synchronization module is further configured to synchronize to the sub-portions of the signal portion with the highest computed energy by providing a strobe to the position processor at the beginning of each of such sub-portions.
2 more elements
Dependencies are inferred from the claim text.