1
Durga Malladi
John E Smee, Jay Rodney Walton, Durga P Malladi, Serge Willenegger: Forward link handoff for wireless communication systems with OFDM forward link and CDMA reverse link. Qualcomm Incorporated, Qualcomm Patent Group, Thien T Nguyen, James H Yancey Jr, March 19, 2013: US08400979 (13 worldwide citation)

A method and apparatus for performing handoff in a wireless communication system with multi-carrier modulation (MCM) for a forward link and CDMA for a reverse link. In one embodiment, a method of performing handoff on the forward link for a terminal is provided in which signal quality of pilots rece ...


2
Durga Malladi
John E Smee, Jay Rodney Walton, Durga P Malladi, Serge Willenegger: Forward link handoff for wireless communication systems with OFDM forward link and CDMA reverse link. Qualcomm Incorporated, Patents Department, April 21, 2005: US20050083888-A1

A method and apparatus for performing handoff in a wireless communication system with multi-carrier modulation (MCM) for a forward link and CDMA for a reverse link. In one embodiment, a method of performing handoff on the forward link for a terminal is provided in which signal quality of pilots rece ...


3
Jay Rodney Walton, John W Ketchum, Mark S Wallace, Steven J Howard: Broadcast transmission with spatial spreading in a multi-antenna communication system. QUALCOMM Incorporated, Thomas R Rouse, Ross L Franks, Thien T Nguyen, November 27, 2007: US07302009 (94 worldwide citation)

An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, and modulated to obtain ND data symbol b ...


4
Mark S Wallace, Jay Rodney Walton, Steven J Howard: Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system. QUALCOMM Incorporated, Philip R Wadsworth, Sandip, Dmitry R Milikovsky, September 19, 2006: US07110463 (63 worldwide citation)

Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case, an initial spatial filter matrix may be derived based on one cha ...


5
Jay Rodney Walton, Sanjiv Nanda: High speed media access control and direct link protocol. Qualcomm Incorporated, Qualcomm Patent Group, Thien T Nguyen, James H Yancey Jr, July 31, 2012: US08233462 (49 worldwide citation)

Techniques for MAC processing for efficient use of high throughput systems that may be backward compatible with various types of legacy systems are disclosed. In one aspect, a data frame is formed comprising a common portion for transmission in a format receivable by various stations, such as access ...


6
Jay Rodney Walton, John W Ketchum, Mark S Wallace, Steven J Howard: Data transmission with spatial spreading in a mimo communication system. Qualcomm Incorporated, Thomas R Rouse, Sandip, Dmitry R Milikovsky, March 20, 2007: US07194042 (44 worldwide citation)

For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spr ...


7
Sanjiv Nanda, Jay Rodney Walton: Distributed hierarchical scheduling in an AD hoc network. Qualcomm Incorporated, Thien Nguyen, Howard Seo, October 19, 2010: US07818018 (40 worldwide citation)

An ad hoc network with distributed hierarchical scheduling is disclosed. In one aspect, stations in a network mesh detect interfering neighbor stations and form interference lists. Stations transmit their interference lists. Scheduling stations schedule allocations for child stations in response to ...


8
John W Ketchum, Mark S Wallace, Jay Rodney Walton, Steven J Howard: Channel estimation and spatial processing for TDD MIMO systems. QUALCOMM Incorporated, Dmitry Milikovsky, Ross L Franks, January 26, 2010: US07653142 (37 worldwide citation)

Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/receive chains at the access point and user terminal. During normal operation, a MIMO pilot is transmitted on a first link and used to derive an estim ...


9
Jay Rodney Walton, John W Ketchum, Mark S Wallace, Steven J Howard: Data transmission with spatial spreading in a MIMO communication system. Qualcomm Incorporated, Qualcomm Patent Group, James H Yancey Jr, December 4, 2012: US08325844 (34 worldwide citation)

For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spr ...


10
Jay Rodney Walton, Mark S Wallace: Receiver for wireless communication network with extended range. QUALCOMM Incorporated, Dmitry R Milikovsky, Ross L Franks, March 23, 2010: US07684473 (26 worldwide citation)

Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processin ...