| US 7,603,133 B2 | ||
| Efficient frame tracking in mobile receivers | ||
| Aykut Bultan, Bayside, N.Y. (US); John W. Haim, Baldwin, N.Y. (US); and Donald Grieco, Manhassett, N.Y. (US) | ||
| Assigned to InterDigital Technology Corporation, Wilmington, Del. (US) | ||
| Filed on Apr. 20, 2005, as Appl. No. 11/110,164. | ||
| Application 11/110164 is a continuation of application No. 10/733952, filed on Dec. 10, 2003, granted, now 7,006,840. | ||
| Claims priority of provisional application 60/507848, filed on Sep. 30, 2003. | ||
| Prior Publication US 2005/0197160 A1, Sep. 08, 2005 | ||
| Int. Cl. H04B 15/00 (2006.01) | ||
| U.S. Cl. 455—502 [455/334; 370/342; 375/149; 375/150] | 4 Claims |
| 1. A method for determining the validity of a most significant path in wireless communications wherein data is transmitted
in frame units in a multipath environment, the method comprising:
accumulating a correlated data sequence N times, each time at a frame offset apart from the previous time;
calculating by a frame tracker processor, a preliminary noise estimate (PNE) equal to an average of the accumulated data values;
calculating by the frame tracker processor, a preliminary noise threshold (PNT) according to the equation C1×PNE;
calculating by the frame tracker processor, a final noise estimate (FNE) equal to the average of accumulated data values below
the PNT;
calculating by the frame tracker processor, a final noise threshold (FNT) according to the equation C2×FNE; and
determining by the frame tracker processor, the validity of the most significant path if the most significant path value is
greater than the FNT.
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