1
Rajiv Laroia, Junyi Li, Sathyadev Venkata Uppala: Power and timing control methods and apparatus. QUALCOMM Incorporated, Milan I Patel, August 17, 2010: US07778643 (166 worldwide citation)

The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. The various states require different amounts of communications resources, e.g., bandwidth. Four supported states of operation are an o ...


2
Rajiv Laroia, Junyi Li, Frank A Lane: Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system. Flarion Technologies, Straub & Pokotylo, Michael P Straub, May 16, 2006: US07047009 (140 worldwide citation)

A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current wireless link to the current BS sector, which forwards the request to the new BS sector, e.g., via a network l ...


3
Rajiv Laroia, Junyi Li, Michaela Catalina Vanderveen: Orthogonal frequency division multiplexing based spread spectrum multiple access. Flarion Technologies, Michael P Straub, Straub & Pokotylo, October 29, 2002: US06473418 (121 worldwide citation)

In an orthogonal frequency division multiplexing (OFDM) based spread spectrum multiple access system the entire bandwidth is divided into orthogonal tones, and all of the orthogonal tones are reused in each cell. To reduce peak-to-average ratio at the mobile transmitter, each voice user is allocated ...


4
Rajiv Laroia, Murari Srinivasan, Junyi Li: Methods and apparatus of enhancing performance in wireless communication systems. Qualcomm Incorporated, Michael P Straub, Straub & Pokotylo, November 28, 2006: US07142864 (118 worldwide citation)

Methods and apparatus for supporting and using multiple communications channels corresponding to different transmit technologies and/or access technologies in parallel within a cell of a wireless communications system are described. Mobile nodes support multiple technologies and can switch between t ...


5
Rajiv Laroia, Junyi Li, Sundeep Rangan, Pramod Viswanath: Base station identification in orthogonal frequency division multiplexing based spread spectrum multiple access systems. Flarion Technologies, Straub & Pokotylo, Michael P Straub, November 1, 2005: US06961364 (118 worldwide citation)

A base station having the strongest downlink signal is identified by utilizing a unique slope of a pilot tone hopping sequence being transmitted by a base station. Specifically, base station identification is realized by determining the slope of the strongest received pilot signal, i.e., the receive ...


6
Rajiv Laroia, Junyi Li, Sundeep Rangan, Sathyadev Venkata Uppala: Uplink timing synchronization and access control for a multi-access wireless communication system. Lucent Technologies, November 22, 2005: US06967936 (107 worldwide citation)

Improved timing synchronization and access control techniques for use in an orthogonal frequency division multiplexed (OFDM) wireless system or other type of wireless communication system. In accordance with the invention, an uplink synchronization and access control system is provided in which mobi ...


7
Rajiv Laroia, Junyi Li, Sundeep Rangan, Sathyadev Venkata Uppala: Signal construction, detection and estimation for uplink timing synchronization and access control in a multi-access wireless communication system. Lucent Technologies, July 26, 2005: US06922388 (96 worldwide citation)

Signal construction, detection and estimation techniques for use in uplink timing synchronization and access control in an orthogonal frequency division multiplexed (OFDM) wireless system or other type of wireless communication system. In accordance with an illustrative embodiment of the invention, ...


8
Pramod Viswanath, Rajiv Laroia, David N C Tse: Methods and apparatus for transmitting information between a basestation and multiple mobile stations. Flarion Technologies, Michael P Straub, Straub & Pokotylo, February 17, 2004: US06694147 (94 worldwide citation)

Methods and apparatus for scheduling mobile stations (MSs) to download data and/or to control the rate of downloading to an MS from a base station (BS) as a function of downlink channel condition information are described. Artificial channel variations, which can be measured at the MS, and feedback ...


9
Rajiv Laroia, Junyi Li, Sundeep Rangan, Murari Srinivasan, Frank A Lane, Prashanth Hande: Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems. Flarion Technologies, Straub & Pokotylo, Michael P Straub, May 2, 2006: US07039370 (92 worldwide citation)

Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one t ...


10
Rajiv Laroia, Junyi Li, Sathyadev Venkata Uppala: Pilot use in orthogonal frequency division multiplexing based spread spectrum multiple access systems. Flarion Technologies, Michael P Straub, Straub & Pokotylo, October 11, 2005: US06954481 (78 worldwide citation)

Base station identification and downlink synchronization are realized by employing pilots including known symbols transmitted at prescribed frequency tones in individual ones of prescribed time intervals. Specifically, the symbols used in the pilots are uniquely located in a time-frequency grid, whe ...