METHOD OF GENERATING AN INDEX VALUE

• US 20090034670A1
• Filed: 10/06/2008
• Published: 02/05/2009
• Est. Priority Date: 02/27/2001
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Demir, Alpaslan, Grieco, Donald M.
• Granted Patent: US 7,746,920 B2
• Time in Patent Office: Days
• US Class Current: 375/354
• CPC Class Codes: H04B 1/7083 Cell search, e.g. using a three-step approach
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04J 3/0608 Detectors therefor, e.g. correlators, state machines
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/00 Synchronisation arrangements

Abstract

A method of generating an index value associated with a primary synchronization code within a communication signal includes splitting a sampled communication signal into even and odd samples. The even and odd samples are correlated with a primary synchronization code of the communication signal and complex values of the even and odd samples are generated. Signal strength values for the even and odd samples are approximated and the approximate signal strength values within a frame of the communication signal are accumulated. A highest accumulated signal strength value is assigned as an index value.

Claims

1. A method of generating an index value associated with a primary synchronization code within a communication signal, comprising:

splitting a sampled communication signal into even and odd samples;

correlating the even and odd samples with a primary synchronization code of the communication signal;

generating complex values of the even and odd samples;

approximating signal strength values for the even and odd samples;

accumulating the approximate signal strength values within a frame of the communication signal; and

assigning as an index value a highest accumulated signal strength value.