David Jonathan Julian

US Patent:

7197692, Mar 27, 2007

Filed:

Jul 13, 2004

Appl. No.:

10/890717

Inventors:

Arak Sutivong - San Diego CA, US
Avneesh Agrawal - San Diego CA, US
David Jonathan Julian - San Diego CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H03M 13/03

US Classification:

714796, 714752, 375262, 375341

Abstract:

Techniques for performing erasure detection and power control for a transmission without error detection coding are described. For erasure detection, a transmitter transmits codewords via a wireless channel. A receiver computes a metric for each received codeword, compares the computed metric against an erasure threshold, and declares the received codeword to be “erased” or “non-erased”. The receiver dynamically adjusts the erasure threshold based on received known codewords to achieve a target level of performance. For power control, an inner loop adjusts the transmit power to maintain a received signal quality (SNR) at a target SNR. An outer loop adjusts the target SNR based on the status of received codewords (erased or non-erased) to achieve a target erasure rate. A third loop adjusts the erasure threshold based on the status of received known codewords (“good”, “bad”, or erased) to achieve a target conditional error rate.

US Patent:

7292856, Nov 6, 2007

Filed:

Dec 22, 2004

Appl. No.:

11/020716

Inventors:

David Jonathan Julian - San Diego CA, US
Avneesh Agrawal - San Diego CA, US
Arak Sutivong - San Diego CA, US
Edward Harrison Teague - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04Q 7/20
H04Q 7/00

US Classification:

455436, 455439, 370331

Abstract:

The disclosed embodiments provide for methods and systems for selecting sectors for handoff in a communication system. According to one aspect, the method includes monitoring an indicia of transmit power on a plurality of RL control channels directed to a plurality of sectors, and selecting one of the sectors as a candidate for a RL handoff. The disclosed embodiments also provide for methods and systems for indicating a selected serving sector for handoff in a communication system. According to one aspect, the method includes sending a first signal to a first sector to indicate the first sector as a serving sector for a forward-link handoff, and sending a second signal to a second sector to indicate the second sector as a serving sector for a reverse-link handoff.

US Patent:

7440399, Oct 21, 2008

Filed:

Dec 22, 2004

Appl. No.:

11/021790

Inventors:

David Jonathan Julian - San Diego CA, US
Edward Harrison Teague - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04L 12/26

US Classification:

370230, 370462, 370342, 370329, 370328, 455436, 455522

Abstract:

Method and apparatus for transmission of information in multiple access communication system is described. Information from a plurality of access terminals is received. Alternatively, an access terminal determines what information needs to be sent to the access point. A determination is made as to whether sufficient resources, such as time, power level, or channels, are available to send an indication of acknowledgment. If sufficient resources are not available at the given time, the transmission of an indication of acknowledgment is delayed until sufficient resources are available.

US Patent:

7453849, Nov 18, 2008

Filed:

Dec 22, 2004

Appl. No.:

11/022507

Inventors:

Edward Harrison Teague - San Diego CA, US
Avneesh Agrawal - San Diego CA, US
David Jonathan Julian - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04Q 7/00

US Classification:

370329, 370348, 370347, 455434, 455450, 455451, 4554521, 455453

Abstract:

Accordingly, a method and apparatus are provided that use implicit de-assignment, instead of explicit deassignment, of resources, such that a mobile terminal can interpret the assignment of the resources to other channel terminals as an implied deassignment of the resources. Thus, reducing the number of assignment or the assignment between the base station and the terminals.

US Patent:

7536626, May 19, 2009

Filed:

Dec 22, 2004

Appl. No.:

11/020708

Inventors:

Arak Sutivong - San Diego CA, US
Avneesh Agrawal - San Diego CA, US
David Jonathan Julian - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03M 13/00

US Classification:

714760

Abstract:

Techniques for performing erasure detection and power control for a transmission without error detection coding are described. For erasure detection, a transmitter transmits codewords via a wireless channel. A receiver computes a metric for each received codeword, compares the computed metric against an erasure threshold, and declares the received codeword to be “erased” or “non-erased”. The receiver dynamically adjusts the transmit power based on whether the codewords met the erasure threshold or not.

US Patent:

7576605, Aug 18, 2009

Filed:

Apr 19, 2007

Appl. No.:

11/737678

Inventors:

Chong U. Lee - San Diego CA, US
David Jonathan Julian - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03F 3/38

US Classification:

330 10, 330207, 330251, 341143, 341177, 341182, 341189, 341190

Abstract:

Power consumption of an output stage such as a class-D output stage may depend on the amplitude and the activity of the signal being output. Here, control signals may be generated to independently control coupled switches of the output stage and to provide a tri-state control scheme for the output stage. These control signals may be generated based on durations of different levels of an input signal over one or more periods of time.

US Patent:

7576672, Aug 18, 2009

Filed:

Aug 23, 2007

Appl. No.:

11/843914

Inventors:

Chong U Lee - San Diego CA, US
David Jonathan Julian - San Diego CA, US
Harinath Garudadri - San Diego CA, US
Somdeb Majumdar - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03M 3/02

US Classification:

341143, 341 77

Abstract:

Apparatus and method for processing signals. A sigma-delta modulator is used. An adaptive dynamic range controller is configured to adaptively adjust the dynamic range of a signal output from the sigma-delta modulator.

US Patent:

7636328, Dec 22, 2009

Filed:

Oct 20, 2004

Appl. No.:

10/969117

Inventors:

Edward Harrison Teague - San Diego CA, US
David Jonathan Julian - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04B 7/00
H04B 7/005
H04L 12/28
H04L 12/56

US Classification:

370277, 370278, 370279, 370280, 370329, 370408

Abstract:

To transmit signaling, a base station obtains signaling for a group of channels used for data transmission and selected from a set of channels having constraints on usage. The base station compresses the signaling based on the channel constraints and obtains at least one message. If multiple messages are to be sent, then the assigned channels are partitioned into multiple subgroups, and the signaling for the channels in each subgroup is compressed to obtain a message for that subgroup. Each message is encoded at a spectral efficiency and transmitted at a power level selected for the message. A Cyclic Redundancy Check (CRC) value is appended to the message(s) for error detection. To receive the signaling, a terminal checks a received message with the appended CRC, decodes the message if the CRC passes, decompresses the decoded message based on the channel constraints, and extracts the signaling for an assigned channel.