1
Arak Sutivong, Ayman Fawzy Naguib, Dhananjay Gore, Alexei Gorokhov, Tingfang Ji: Separating pilot signatures in a frequency hopping OFDM system by selecting pilot symbols at least hop away from an edge of a hop region. QUALCOMM Incorporated, Dmitry R Milikovsky, Darren M Simon, August 3, 2010: US07768979 (43 worldwide citation)

Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The patterns may be selected according to a location of the mobile station with respect to one or more antennas are provided. In some aspects, the pattern may be selected based upon the distance b ...


2
Tingfang Ji, Ayman Naguib, Arak Sutivong, Dhananjay Ashok Gore, Alexei Gorokhov: Channel structures for a quasi-orthogonal multiple-access communication system. QUALCOMM Incorporated, Stanton Braden, May 21, 2013: US08446892 (41 worldwide citation)

A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. T ...


3
Petru Cristian Budianu, Dhananjay Ashok Gore, Alexei Gorokhov: Simplified channel and interference estimation with dedicated pilot tones for OFDMA. Qualcomm Incorporated, Turocy & Watson, July 6, 2010: US07751510 (37 worldwide citation)

Estimation of channel characteristics and interference level in a time-varying multi-carrier multi-user systems is carried out concurrently. To perform the estimation, a multitude of data symbols and dedicated pilot symbols are transmitted over the channel. The estimate of the interference level is ...


4
Alexei Gorokhov, Johan Paul Marie Gerard Linnartz: Multicarrier transmission system with reduced complexity leakage matrix multiplication. Koninklijke Philips Electronics, May 30, 2006: US07054354 (32 worldwide citation)

Described is a transmission system for transmitting a multicarrier signal from a transmitter (10) to a receiver (20). The multicarrier signal comprises a plurality of subcarriers. The receiver (20) comprises a channel estimator (28) for estimating amplitudes of the subcarriers and for estimating tim ...


5
Aamod Khandekar, Alexei Gorokhov, Avneesh Agrawal, Rajiv Vijayan, Edward Harrison Teague, Fatih Ulupinar: Scalable frequency band operation in wireless communication systems. QUALCOMM Incorporated, Stanton Braden, October 25, 2011: US08045512 (31 worldwide citation)

To support mobile stations that are not capable of demodulating the entire bandwidth or that can be made to demodulate less than the entire bandwidth, a system, apparatus and method are provided to schedule users on less than all of the bandwidth. Further, certain users can be scheduled on more of t ...


6
Aamod Khandekar, Alexei Gorokhov, Avneesh Agrawal, Sundeep Rangan, Arnab Das: Acknowledgement of control messages in a wireless communication system. QUALCOMM Incorporated, Donald C Kordich, July 2, 2013: US08477684 (29 worldwide citation)

Techniques for sending control messages are described. In an aspect, assignment messages may be acknowledged based on either linked or dedicated acknowledgement (ACK) resources. A terminal may receive an assignment message from a base station, determine whether to acknowledge the assignment message, ...


7
Johan Paul Marie Gerard Linnartz, Alexei Gorokhov, Johannes Wilhelmus Maria Bergmans, Antonius Adrianus Cornelis Maria Kalker: Multicarrier receiver with channel estimator. Koninklijke Philips Electronics, Larry Liberchuk, April 17, 2007: US07206349 (27 worldwide citation)

Described is a transmission system for transmitting a multicarrier signal from a transmitter (10) to a receiver (20). The multicarrier signal comprises a plurality of subcarriers. The receiver (20) comprises a channel estimator (28) for estimating amplitudes of the subcarriers and for estimating tim ...


8
Min Dong, Alexei Gorokhov, Tingfang Ji: Orthogonal resource reuse with SDMA beams. QUALCOMM Incorporated, Dmitry Romanovich Milikovsky, Charles E Eggers, October 11, 2011: US08036669 (24 worldwide citation)

A wireless communication system can implement beamforming across multiple omni-directional antennas to create beams at different spatial directions. The communication system can arrange the beams in sets, with each set arranged to provide substantially complete coverage over a predetermined coverage ...


9
Ahmed K Sadek, Alexei Gorokhov, Stephen J Shellhammer: Multichannel dynamic frequency selection. QUALCOMM Incorporated, Jeffrey D Jacobs, October 16, 2012: US08290503 (24 worldwide citation)

Multichannel dynamic frequency selection in wireless networks begins with an access point for a wireless network broadcasting a list of unused channels that are available for communication within the area served by the access point. The various access terminals within this service area receive the b ...


10
Rajat Prakash, Aamod Khandekar, Alexei Gorokhov: Method and apparatus for transmitting and receiving selected interlace acknowledgement messages in wireless communication systems. Qualcomm Incorporated, Turocy & Watson, September 27, 2011: US08027302 (21 worldwide citation)

An apparatus and method of acknowledging transition to SelectedInterlacesOff state in a wireless communication system are described. A SelectedInterlaceAck message comprising an 8 bit MessageID field, a 12 bit PilotPN field wherein the PilotPN field is set to the PilotPN of the sector to which the m ...