Physical layer structures and initial access schemes in an...

Details Physical layer structures and initial access schemes in an... Physical layer structures and initial access schemes in an...

2004-01-21

2010-06-15

Eng, George (Department: 2617)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S335000, C370S208000, C375S145000

Reexamination Certificate

active

07738437

ABSTRACT:
Physical layer structures and related access schemes for unsynchronized communication networks are provided. Access channel information, preferably including a common synchronization code associated with all transceiver stations in a communication network and a cell-specific synchronization code uniquely associated with one of the transceiver stations, is modulated onto at least one set of time-continuous signal components of a communication signal. In order to access the communication network, communication terminals search for the access channel information in one or more sets of time-continuous signal components and synchronization parameters are then determined based on a location of the access channel information in the sets of time-continuous signal components. Some embodiments of the invention provide for joint frame synchronization and coarse timing synchronization. In further embodiments, the communication signal also includes a scattered pilot channel onto which a portion of the access channel information, preferably the cell-specific synchronization code, is modulated. The pilot channels may then be re-used for initial access operations in addition to its conventional uses for such operations as channel estimation.

REFERENCES:
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patent: 6567383 (2003-05-01), Bohnke
patent: 6643281 (2003-11-01), Ryan
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patent: 2003/0081538 (2003-05-01), Walton et al.
patent: 2004/0085946 (2004-05-01), Morita et al.

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