Fan Fan J Wang

7054656, May 30, 2006

Aug 2, 2002

10/211609

Frank Fei Zhou - Arlington Heights IL, US
Jiangnan Jason Chen - Hawthorn Woods IL, US
Fan Wang - Palatine IL, US

Motorola, Inc. - Schaumburg IL

H04B 7/00
H04Q 7/20

455522, 455 69, 455 134, 370318, 370320

Using conventional techniques, a common power control channel provides information used by mobile stations for power control operation of each mobile station. In accordance with the present invention, the common power control channel is also used to provide information used by the mobile stations for purposes other than the power control operation of each mobile station. In one embodiment, the information used for purposes other than power control operation comprises information instruction the mobile station to transition to an active state. In another embodiment, the information used for non-power control purposes is transmitted to mobile stations during periods in which the power control information is not being transmitted. Using a common power control channel in this manner substantially reduces the resources consumed by a mobile station while operating in a stand-by state.

7450944, Nov 11, 2008

Nov 3, 2005

11/266469

John M. Harris - Chicago IL, US
Ivan N. Vukovic - Arlington Heights IL, US
Fan Wang - Vernon Hills IL, US

Motorola, Inc. - Schaumburg IL

H04B 7/00

455436, 455450, 455453, 455502, 370331, 370335, 370336, 370349, 370350, 375150, 375326, 340825

An apparatus and method for monitoring () at least one factor relating to a wireless communication system () is provided such that a synchronization signal is sent () to at least one base transceiver station () neighboring a primary base transceiver station () at least in part according to a predetermined function of the monitored factor(s). The monitored factor may be any of several factors that weigh on the operation of the wireless communication system. The synchronization signal itself may vary in how it signals to the neighboring base transceiver station(s) () to synchronize with the data to be sent to a given mobile station () from its primary base transceiver station (), and the number of synchronization signals sent over a given time may vary according to the predetermined function of the monitored factor(s).

7477699, Jan 13, 2009

Dec 20, 2006

11/613349

Fan Wang - Chicago IL, US
Lawrence A. Downing - Hoffman Estates IL, US
Amitava Ghosh - Buffalo Grove IL, US
Chandrasekar Sankaran - Arlington Heights IL, US
Jun Tan - Lake Zurich IL, US

Motorola, Inc. - Schaumburg IL

H04B 7/02
H04L 1/02

375267, 375260, 375299, 375347, 455101, 455103, 455 69, 455104

A radio communications device () that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device () that has multiple transmit antennas. A channel throughput (--) for each transmission technique is estimated based on signal to interference and noise ratios (--) of signals being transmitted through a MIMO channel () as measured by a receiver (). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.

7489755, Feb 10, 2009

Feb 9, 2005

11/054290

Fan Wang - Vernon Hills IL, US
Amitava Ghosh - Buffalo Grove IL, US
Chandrasekar Sankaran - Arlington Heights IL, US
Jun Tan - Dearborn Heights MI, US

Motorola, Inc. - Schaumburg IL

H04L 7/00

375363, 375134, 375135, 375136, 375137, 375145, 375146, 375147, 375246, 375253, 375342, 375365, 375366, 375367, 375370, 375265

Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator () to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter () then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain.

7539214, May 26, 2009

Dec 8, 2004

11/007465

John M. Harris - Chicago IL, US
Vijay G. Subramanian - Chicago IL, US
Fan Wang - Vernon Hills IL, US
Jyoti Black - St. Charles IL, US

Motorola, Inc. - Schaumburg IL

H04J 3/24

370473, 370471

A mobile station () senses () at least one boundary of a wireless communication packet () which includes a plurality of frames. The mobile station () then determines () at least a first group () and a second group () of frames at least in part in relation to the sensed boundary. The first group () of frames is received () at a first target reliability, and the second group () of frames is received () at a second target reliability. Optionally, the frames are sent () or received at a variable reliability in relation to the frames' distances from one or more boundaries () of the packet ().

7747225, Jun 29, 2010

Oct 3, 2006

11/538432

Fan Wang - Chicago IL, US
Stanley J. Benes - Round Lake Beach IL, US
Amitava Ghosh - Buffalo Grove IL, US
Jun Tan - Lake Zurich IL, US

Motorola, Inc. - Schaumburg IL

H04B 17/00
H04B 1/00
H04B 7/00
H04B 7/185
H04M 1/00
H04W 4/00

455 69, 4555621, 455 6711, 370334, 370318

A subscriber unit () with multiple receive antennas () and a single transmit antenna () derives beamforming weights to be used at a base station () with multiple transmitting antennas (, and ). The downlink beamforming weights are derived at the subscriber unit () from a prior downlink transmission from the base station () to the subscriber device () and an uplink sounding signal is used to carry derived downlink beam forming weights to the base station (). Downlink antenna specific pilots (without weight) are used at the subscriber device () to determine the beamforming weights. Decimated sounding signals, where the number of sounding subcarriers is at least the same as the number of antennas at the base station (), allow multiple users to sound at the same time.

8000305, Aug 16, 2011

Jan 10, 2007

11/621587

Jun Tan - Lake Zurich IL, US
Amitava Ghosh - Buffalo Grove IL, US
Rapeepat Ratasuk - Hoffman Estates IL, US
Fan Wang - Chicago IL, US
Weimin Xiao - Barrington IL, US

Motorola Mobility, Inc. - Libertyville IL

H04B 7/216

370335, 455434

A system and method for initializing a system communication without previous reservations for random access channel (RACH) access includes a first step of defining at least one spread sequence derived from at least one constant amplitude zero autocorrelation sequence. A next step includes combining the spread sequence with a Walsh code to form an extended spread sequence. A next step includes using the extended spread sequence in a preamble for a RACH. A next step includes sending the preamble to a BTS for acquisition. A next step includes monitoring for a positive acquisition indicator from the BTS. A next step includes scheduling the sending of a RACH message. A next step includes sending the RACH message.

8055198, Nov 8, 2011

Aug 27, 2008

12/198910

Stanley J. Benes - Round Lake Beach IL, US
Chandrasekar Sankaran - Arlington Heights IL, US
Fan Wang - Chicago IL, US

Motorola Mobility, Inc. - Libertyville IL

H04B 1/00
H04B 15/00

455 631, 455522, 455 6711

An apparatus and method to provide uplink interference control in a WiMAX communication system includes a step of receiving a downlink channel quality indication from an MS. A next step selecting a modulation product ratio modification parameter in response to the channel quality indication. A next step includes modifying a modulation product ratio by the modification parameter. A next step includes mapping the modified modulation product ratio against a table of modulation coding schemes. A next step includes applying the mapped modulation coding scheme.