United States Patent 7,609,785
Pietraski , et al. October 27, 2009
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Mitigation of interference in cell search by wireless transmit and receive units
Abstract
A wireless transmit receive unit (WTRU) provides facilitation of cell search. In one embodiment, received samples are split into a plurality of sample sets for processing. Each of the sets is processed and an accumulated result is divided by an estimated noise value. In another embodiment, a code correlator correlates the received signal with a primary synchronization code and an auxiliary code correlator having a same length as the code correlator correlates the received signal with a code having a low cross correlation with the primary synchronization code. In another embodiment, a division of an accumulated result with a noise estimate is performed using indexes of the most significant bits.
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Inventors: Pietraski; Philip J. (Huntington Station, NY), Demir; Alpaslan (East Meadow, NY), Grieco; Donald M. (Manhassett, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/190,935
Filed: August 13, 2008
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
10660842 Aug., 2008 7415084
60410735 Sep., 2002
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Current U.S. Class: 375/335 ; 375/346
Current International Class: H04L 27/14 (20060101); H03D 1/04 (20060101)
Field of Search: 375/346,335,130,145,146,149,362 370/350,342,335,320
