Christopher Q Riddle

US Patent:

6999533, Feb 14, 2006

Filed:

Nov 30, 2001

Appl. No.:

10/000817

Inventors:

Chandra R. Murthy - San Jose CA, US
Serguei A. Glazko - San Diego CA, US
Christopher C. Riddle - San Diego CA, US
Angelica Wong - San Francisco CA, US

Assignee:

QUALCOMM, Incorporated - San Diego CA

International Classification:

H04L 27/06

US Classification:

375343

Abstract:

The invention provides the ability to exploit redundancy characteristics of an equation set used to generate waveforms for wireless communication. In doing so, the invention can reduce the number of correlation values that need to be calculated in order to determine the most likely transmitted code word. In particular, the invention can exploit the redundancy characteristics of the equation set in a novel and unique fashion by separating the vector and calculating partial correlations for each separated portion of the vector. The techniques can drastically reduce the number of correlation values that need to be computed for demodulation, and can also reduce the total number of computations. In this manner, the demodulator of a wireless communication device can be simplified without negatively impacting performance.

US Patent:

7340268, Mar 4, 2008

Filed:

Jun 10, 2003

Appl. No.:

10/457846

Inventors:

Hyukjun Oh - Santa Clara CA, US
Nitin Kasturi - Los Gatos CA, US
Messay Amerga - San Diego CA, US
Chih-Ping Hsu - San Diego CA, US
Christopher C. Riddle - San Diego CA, US
Andrew Sendonaris - San Jose CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04B 7/00
H04Q 7/20

US Classification:

455522, 455 69, 455 6711, 455442, 370320, 370332, 370335, 370345

Abstract:

The reliability of transmit power control (TPC) commands received from a transmitter is determined based on a TPC target value. The TPC target value is derived based on a TPC threshold and possibly a weight, depending on the receiver implementation. A received TPC command is considered reliable if its absolute value exceeds the TPC target value. Received TPC commands deemed as unreliable are discarded and not used for power control. Multiple TPC target values, used for detecting UP and DOWN commands, may be derived with multiple scaling factors. For a receiver in soft handover and receiving TPC commands from multiple transmitters, a different TPC target value may be derived for each transmitter. The received TPC commands for each transmitter are compared against that transmitter's TPC target value. Received TPC commands deemed as unreliable are discarded and not combined.