Satish S Kulkarni

US Patent:

7082451, Jul 25, 2006

Filed:

Sep 9, 2002

Appl. No.:

10/237465

Inventors:

Satish S. Kulkarni - Austin TX, US
Brian T. Kelley - Austin TX, US

Assignee:

Freescale Semiconductor, Inc. - Austin TX

International Classification:

G06F 15/00

US Classification:

708404

Abstract:

Systems and methods are described for providing a reconfigurable circuit having multiple distinct circuit configurations with respective distinct operating modes The circuit may be controllably configures to perform a fast Fourier transform function, a multiplier function, and a divider function. In one exemplary practical application of the invention, the fast Fourier transform function, multiplier function, and divider function may be used for signal demodulation, channel equalization and channel estimation for a WLAN IEEE 802. 11 system.

US Patent:

7346098, Mar 18, 2008

Filed:

Nov 25, 2003

Appl. No.:

10/721950

Inventors:

Weizhong Chen - Austin TX, US
Sekchin Chang - Austin TX, US
Satish S. Kulkarni - Austin TX, US

Assignee:

Freescale Semiconductor, Inc. - Austin TX

International Classification:

H04B 1/00

US Classification:

375150, 375136, 375147

Abstract:

A timing and carrier error detector module () of a communication receiver (). The timing and carrier error detector module uses phase information of a correlated signal (e. g. a Barker de-spread signal) to generate a timing signal and carrier error signal. In one example, the phase information includes a phase error signal of the correlated signal. In one example, the timing and carrier error detector module calculates an indication of the variance of the phase error signal for a plurality of sample positions over a plurality of Barker symbol intervals. The timing signal is based upon the sample position having a minimum indication of a variance.

US Patent:

7778674, Aug 17, 2010

Filed:

Dec 29, 2004

Appl. No.:

11/025673

Inventors:

Frederick A. Rush - Austin TX, US
Satish S. Kulkarni - Austin TX, US

Assignee:

ST-Ericsson SA - Geneva

International Classification:

H04M 1/00

US Classification:

455574, 4555561, 455558, 713300, 710 13

Abstract:

A communication apparatus including a radio frequency (RF) circuit coupled to a digital processing circuit and an interface circuit coupled to an authentication device. The RF circuit may be configured to operate on a radio frequency signal. A portion of the digital processing circuit may be disabled during an active mode of operation of the RF circuit. The interface circuit may be configured to buffer data communicated between the digital processing circuit and an authentication device during the active mode of operation of the RF circuit. In one embodiment, the interface circuit includes a memory and memory control logic to buffer data available for transmission to and/or received from the authentication device. In some embodiments, the digital processing circuit includes a processing unit configured to process authentication data received from the authentication device. In these and other embodiments, the authentication device may be a subscriber identity module (SIM).

US Patent:

8019382, Sep 13, 2011

Filed:

Dec 29, 2004

Appl. No.:

11/025672

Inventors:

Frederick A. Rush - Austin TX, US
Satish S. Kulkarni - Austin TX, US

Assignee:

ST-Ericsson SA - Plan-Les-Ouates

International Classification:

H04M 1/00

US Classification:

4555531, 455417, 455418, 4554261

Abstract:

A communication apparatus including a digital processing circuit coupled to a radio frequency (RF) circuit and to a serial communications device. The serial communications device may be configured to buffer data communicated between the digital processing circuit and an external device. A portion of the serial communications device may be disabled during an active mode of operation of the RF circuit. The serial communications device may include a flow control logic circuit configured to control a data stream between the digital processing circuit and the external device while a portion of the serial communications device is disabled. In some embodiments, a portion of the digital processing circuit may be disabled during an active mode of operation of the RF circuit.

US Patent:

20060058027, Mar 16, 2006

Filed:

Sep 14, 2004

Appl. No.:

10/940365

Inventors:

Jing Fang - Austin TX, US
Satish Kulkarni - Austin TX, US

Assignee:

MOTOROLA, INC. - Schaumburg IL

International Classification:

H04B 1/00
H04B 17/00
H04Q 7/20

US Classification:

455434000, 455063100, 455067110

Abstract:

A method and apparatus for frequency estimation useful in location determination utilizes a plurality of energy detectors to estimate the frequency associated with a peak energy value as determined by the energy detectors. An iterative process is implemented such that the frequency estimate corresponds to the Doppler frequency or carrier frequency error.