Method and system for acquiring ultra-wide-bandwidth communications signals using sequential block searches
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsAndreas Molisch, Sinan Gezici, Hisashi Kobayashi, H. Vincent Poor
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Abstract
A method and system acquire a received impulse radio signal by first searching, with respect to time, a region of the impulse radio signal using a first template signal to locate a block including a signal cell, and second searching, with respect to time, the block using a second template signal to locate the signal cell to acquire the received impulse radio signal.
Claims13
A method for acquiring a received impulse radio signal, comprising:
- searching, with respect to time, a region of the impulse radio signal using a first template signal to locate a block including a signal cell;
- and
- searching, with respect to time, the block using a second template signal to locate the signal cell to acquire the received impulse radio signal.
The method of claim further comprising:
- wherein a first correlation interval associated with the first template signal is substantially longer than a second correlation interval associated with the second template signal.
A system for acquiring a received impulse radio signal, comprising:
- first means for searching, with respect to time, a region of the impulse radio signal using a first template signal to locate a block including a signal cell;
- and
- second means for searching, with respect to time, the block using a second template signal to locate the signal cell to acquire the received impulse radio signal.
An apparatus for acquiring a received impulse radio signal, comprising:
- a correlation unit configured to search, with respect to time, a region of the impulse radio signal using a first template signal to locate a block including a signal cell, and to search, with respect to time, the block using a second template signal to locate the signal cell to acquire the received impulse radio signal;
- a synchronization unit to time-shift the first and second template signals while searching;
- and
- a decision unit to compare first and second outputs of the correlation unit to first and second thresholds while searching the region and block respectively.
Dependencies are inferred from the claim text.