公开(公告)号：EP1757115A2

公开(公告)日：2007-02-28

申请号：EP05753134.5

申请日：2005-05-20

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： GOLDBERG, Steven, Jeffrey ,  OZLUTURK, Fatih ,  PAN, Jung-Lin ,  TSAI, Yingming

IPC: H04Q7/20

CPC classification number: H04W16/28 ,  H04W16/24

Abstract: A wireless communication system and method generates and shapes one or more three-dimensional control channel beams for transmitting and receiving signals. Each three-dimensional beam is directed to cover a particular coverage area and beam forming is utilized to adjust bore sight and beam width of the three-dimensional beam in both azimuth and elevation, and the three-dimensional control channel beam is identified. In another embodiment, changes in hot-zones or hot-spots, (i.e., designated high volume user coverage areas), are managed by a network cell base station having at least one antenna. Each of a plurality of wireless transmit/receive units (WTRUs) served by the base station use a formed beam based on one or more beam characteristics. When the coverage area is changed, the base station instructs at least one of the WTRUs to change its beam characteristics such that it forms a return beam concentrated on the antenna of the base station.

公开(公告)号：EP1719357A2

公开(公告)日：2006-11-08

申请号：EP05713087.4

申请日：2005-02-07

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： OZLUTURK, Fatih

IPC: H04Q7/20

CPC classification number: H04W64/00

Abstract: Location of a portable device with a transmitter, such as a wireless transmit/receive unit (WTRU) in a cellular telecommunications network, is obtained by a primary network augmented by data obtained from a diverse network. In a particular configuration, changes of the indication of the location of the portable device are used to update positional information, such as positional information obtained from a GPS receiver.

公开(公告)号：EP1632039A1

公开(公告)日：2006-03-08

申请号：EP04751475.7

申请日：2004-05-06

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  OZLUTURK, Fatih ,  NARAYAN, Geetha, Lakshmi

IPC: H04B7/00

CPC classification number: H04B1/30 ,  H03D3/008

Abstract: A digital baseband (DBB) receiver for receiving and processing a wireless communication signal. The DBB receiver includes at least one low noise amplifier (LNA), at least one demodulator, a direct current (DC) discharge circuit and an LNA control circuit. The LNA selectively amplifies the communication signal. The demodulator outputs analog real and imaginary signal components on real and imaginary signal paths, respectively, in response to receiving the communication signal from the LNA. The DC discharge circuit selectively discharges DC accumulating on at least one of the real and imaginary signal paths. The LNA control circuit turns the LNA on or off.

公开(公告)号：EP1561365A2

公开(公告)日：2005-08-10

申请号：EP03774944.7

申请日：2003-10-23

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： SHIN, Sung-Hyuk ,  ZEIRA, Ariela ,  OZLUTURK, Fatih ,  GRIECO, Donald, M.

IPC: H05B7/00

CPC classification number: H04W52/228 ,  H04W52/08 ,  H04W52/24 ,  H04W52/287 ,  H04W52/44

Abstract: A transmitting station performs closed loop power control prior to a transmission pause. A closed loop transmission power level prior to the pause is determined. A reference signal is received and a received power level of the reference signal prior to and during the transmission pause is determined. The measured reference signal received power levels are compared to a transmit power level of the reference signals to produce a pathloss estimate of the reference signal prior to and during the transmission pause. A new transmit power level is determined by adjusting the closed loop transmission power level by a change between the prior to and during pathloss estimates. A transmission power level of the transmitting station is set to the determined new transmit power level. A communication is transmitted at the set transmission power level.

公开(公告)号：EP1169781B1

公开(公告)日：2004-10-27

申请号：EP00907229.9

申请日：2000-02-10

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： OZLUTURK, Fatih

IPC: H04B1/707

CPC classification number: H04J13/0022 ,  H04B1/707 ,  H04B2201/70703 ,  H04J13/10

Abstract: A wireless communications system employs code-division multiple access information transmission techniques where the uplink and downlink transmission bandwidths are unequal. The higher bandwidth is an integer multiple of the lower bandwidth. The present system requires a base station and a subscriber unit to have two-pseudo-random code generators which can be clocked separately. Alignment of the uplink and downlink pseudo-random spreading codes is achieved by truncating the code sequence for the lower speed link at the conclusion of a complete code sequence for the higher speed link.

公开(公告)号：EP1779681A2

公开(公告)日：2007-05-02

申请号：EP05783823.7

申请日：2005-07-29

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： OZLUTURK, Fatih ,  PIETRASKI, Philip, J. ,  BULTAN, Aykut

IPC: H04Q7/00

CPC classification number: H04W52/262 ,  H04B7/046 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0046 ,  H04L5/006 ,  H04L25/0206 ,  H04W52/42

Abstract: A method and apparatus for radio resources control in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system are disclosed. Channel metric is calculated for each of a plurality of transmit antennas. Sub-carriers are allocated to each transmit antenna in accordance with the channel metric of each transmit antenna. Signals are transmitted using the allocated sub-carriers at each antenna. Adaptive modulation and coding and transmit power control of each sub-carrier may be further implemented in accordance with the channel metric. Power control may be implemented per antenna basis or per sub-carrier basis. In performing power control, a subset of transmit antennas may be selected and waterpouring may be applied only to the selected antennas. Waterpouring may be based on SNR instead of channel response.

公开(公告)号：EP1488532B1

公开(公告)日：2007-04-25

申请号：EP03709422.4

申请日：2003-03-04

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： KAZAKEVICH, Leonid ,  KLAHN, Gerard ,  OZLUTURK, Fatih

IPC: H04B1/02 ,  H04B7/02 ,  H04B7/185 ,  H03C7/02 ,  H04B7/08

CPC classification number: H04B7/0868 ,  H04B7/0811 ,  H04B7/0857

Abstract: Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink wherein priority is given to the antenna receiving a better quality signal. Measurements are taken during each time slot to determine the weighting to be given to the antenna with the better quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal the techniques described herein may be used individual, and in some cases are combined to receive additional benefits in efficiency.

公开(公告)号：EP1568192A1

公开(公告)日：2005-08-31

申请号：EP03783365.4

申请日：2003-11-14

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： OZLUTURK, Fatih ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir ,  DEMIR, Alpaslan ,  NARAYAN, Geetha, Lakshmi ,  KEARNEY, Kenneth

IPC: H04M1/00

CPC classification number: H03G3/001 ,  H03D3/008 ,  H03D3/009 ,  H03G3/3068 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307 ,  H03G2201/508 ,  H04B1/30 ,  H04L2027/0016 ,  H04L2027/0024

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component (105) tolerances of an analog radio (100), a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (110) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency parameters.

公开(公告)号：EP0903016B1

公开(公告)日：2004-09-08

申请号：EP98912922.6

申请日：1998-03-10

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： OZLUTURK, Fatih ,  JACQUES, Alexander ,  LOMP, Gary ,  KOWALSKI, John

IPC: H04B1/707 ,  H04B7/26

CPC classification number: H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/7093 ,  H04B1/7103 ,  H04B1/7115 ,  H04B1/712 ,  H04B1/7183 ,  H04B7/2637 ,  H04B7/264 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/7071 ,  H04J13/00 ,  H04J13/10 ,  H04J2013/0037 ,  H04L1/004 ,  H04L25/0212 ,  H04L27/206 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0053 ,  H04W24/08 ,  H04W28/22 ,  H04W36/06 ,  H04W52/0238 ,  H04W52/04 ,  H04W52/08 ,  H04W52/143 ,  H04W52/146 ,  H04W52/24 ,  H04W52/26 ,  H04W52/322 ,  H04W52/325 ,  H04W52/343 ,  H04W52/346 ,  H04W52/36 ,  H04W52/362 ,  H04W52/367 ,  H04W52/44 ,  H04W52/50 ,  H04W52/52 ,  H04W52/60 ,  H04W72/0466 ,  H04W88/021 ,  H04W88/08 ,  H04W88/181 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/21 ,  Y02D70/40 ,  Y02D70/449

Abstract: The present invention claims a multiple access spread-spectrum communication system for dynamically changing a transmission rate of an information signal received from a remote processing unit (RPU) over a telecommunication line and transmitted to a subscriber through a first spread-spectrum message channel of a plurality of spread spectrum message channels, the system comprising a) a base station, connected to the RPU, which identifies an information signal rate of the respective information signal and provides a modify signal responsive to the information signal rate; comprising: a system channel controller which assigns the information signal and the modify signal to respectively different ones of the plurality of spread-spectrum message channels; first information channel mode modification means connected to the system channel controller and responsive to the modify signal for switching the respective information signal from the first spread-spectrum message channel supporting a first information channel rate to one other pre-determined spread-spectrum message channel, the one other pre-determined spread-spectrum message channel having a different information channel rate supporting the identified information signal rate; and b) a subscriber unit comprising: a first despreading means for recovering the respective information signal and modify signal from the first spread spectrum message channel; second information channel mode modification means responsive to the modify signal for reassigning the first despreading means to a second despreading means which supports the different information channel rate, the second despreading means corresponding to the second spread spectrum message channel.

公开(公告)号：EP1435145A2

公开(公告)日：2004-07-07

申请号：EP02768976.9

申请日：2002-10-04

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： SHIN, Sung-Hyuk ,  OZLUTURK, Fatih ,  ZEIRA, Ariela ,  KOO, Chang-Soo

IPC: H04B7/185

CPC classification number: H04W52/228 ,  H04W52/08 ,  H04W52/221 ,  H04W52/226 ,  H04W52/242 ,  H04W52/243 ,  H04W52/248 ,  H04W52/36

Abstract: A transmitting station receives a transmit power command and a reference signal. The transmit power command indicates an increase or decrease in transmission power for the transmitting station. A received power level of the reference signal is measured and the measured reference signal received power level is compared to a transmit power level of the reference signal to produce a pathloss estimate of the reference signal. A size of a change in transmit power level is determined using the pathloss estimate. A transmission power level of the transmitting station is adjusted in response to the transmit power command in an amount of the determined change in size. A communication is transmitted at the adjusted transmission power level.