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Uri Landau Phones & Addresses

  • 5989 Agee St, San Diego, CA 92122 (858) 452-6815 (858) 550-0628

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Uri Landau Photo 1

Telecommunications Professional

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Location:
Greater San Diego Area
Industry:
Telecommunications

Publications

Us Patents

Method And System For Weight Determination In A Spatial Multiplexing Mimo System For Wcdma/Hsdpa

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US Patent:
7483675, Jan 27, 2009
Filed:
Jun 30, 2005
Appl. No.:
11/172759
Inventors:
Mark Kent - Vista CA,
Vinko Erceg - Cardiff CA,
Uri M. Landau - San Diego CA,
Pieter Van Rooyen - San Diego CA,
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04B 17/00
US Classification:
455 6711, 4555621, 375147, 375347, 370208
Abstract:
Certain aspects of the method may comprise generating models for a received plurality of spatially multiplexed communication signals for multiple channels from a plurality of transmit antennas. A calculated signal to noise ratio (SNR) of each multiple channel may be maximized based on the generated models. A phase and an amplitude of at least a portion of the received plurality of spatially multiplexed communication signals may be adjusted based on a plurality of amplitude and phase correction weights determined from the maximized SNR.

Method And Apparatus For Improving Noise Power Estimate In Wcdma Network

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US Patent:
8600423, Dec 3, 2013
Filed:
Apr 8, 2010
Appl. No.:
12/756332
Inventors:
Severine Erceg - Cardiff CA,
Vinko Erceg - Cardiff CA,
Mark Kent - Vista CA,
Uri M. Landau - San Diego CA,
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04B 7/00
US Classification:
455522, 455 631, 455 65, 455 6713, 455 69, 455442, 370318
Abstract:
Method and apparatus for improving a noise power estimate in a wideband CDMA (WCDMA) network are disclosed and may include calculating a total noise power estimate for a downlink channel based on a plurality of control channel bits from a plurality of different types of control channels. The plurality of control channel bits may include at least two of: dedicated physical channel (DPCH) transmit power control (TPC) bits, DPCH pilot bits, and common pilot channel (CPICH) bits. A first noise power estimate may be calculated for the downlink channel based on a plurality of the DPCH TPC bits. A value of at least one of the plurality of DPCH TPC bits may not be known when the at least one of the plurality of DPCH TPC bits is received.

Method And System For Channel Estimation In A Single Channel (Sc) Multiple-Input Multiple-Output (Mimo) System Comprising Two-Transmit (2-Tx) And Multiple-Receive (M-Rx) Antennas For Wcdma/Hsdpa

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US Patent:
2006007, Apr 6, 2006
Filed:
Jun 30, 2005
Appl. No.:
11/173252
Inventors:
Mark Kent - Vista CA,
Vinko Erceg - Cardiff CA,
Uri Landau - San Diego CA,
Pieter van Rooyen - San Diego CA,
Pieter Roux - San Diego CA,
International Classification:
H04J 15/00
US Classification:
370464000
Abstract:
In a wireless system, a method and system for channel estimation in a single channel MIMO system comprising two-transmit and multiple-receive antennas for WCDMA/HSDPA are provided. A first receive antenna and at least one additional receive antenna may receive a plurality of SC communication signals transmitted from a first and an additional transmit antennas. Estimates of the propagation channels between transmit and receive antennas may be performed concurrently and may be determined from a baseband combined channel estimate. The integration time may be based on channel estimation accuracy and wireless modem performance. The signals received in the additional receive antennas may be multiplied by a rotation waveform to achieve channel orthogonality. The rotation waveform's amplitude and phase components may be modified based on the channel estimates. Rotation of the received signals in the additional receive antennas may be continuous or periodic.

Method And System For Channel Equalization

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US Patent:
2006007, Apr 6, 2006
Filed:
Jun 30, 2005
Appl. No.:
11/173502
Inventors:
Mark Kent - Vista CA,
Vinko Erceg - Cardiff CA,
Uri Landau - San Diego CA,
Pieter Rooyen - San Diego CA,
International Classification:
H04J 11/00
US Classification:
370203000
Abstract:
Methods and systems for processing signals in a receiver are disclosed herein and may comprise generating at least one channel estimate of a time varying impulse response for at least one of a plurality of received clusters within at least one received signal, where a cluster may comprise an aggregate of continuously processed received multipaths. The generated channel estimate may be transformed to at least one flat fading channel estimate utilizing at least one signal-to-noise ratio optimization algorithm. Complex waveforms, comprising in-phase (I) and quadrature (Q) components, may be processed for the plurality of received clusters within the received signal, and the processed complex waveforms may be filtered. The resulting filtered waveforms may be convolved with the generated channel estimate to generate a convolved input signal. A weight signal for the transforming may be generated, utilizing the at least one signal-to-noise ratio optimization algorithm and the generated convolved input signal.

Method And System For Channel Estimation In A Spatial Multiplexing Mimo System

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US Patent:
7995537, Aug 9, 2011
Filed:
Apr 21, 2009
Appl. No.:
12/427206
Inventors:
Mark Kent - Vista CA,
Vinko Erceg - Cardiff CA,
Uri M Landau - San Diego CA,
Pieter van Rooyen - San Diego CA,
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04Q 7/00
US Classification:
370334, 375260, 455 111
Abstract:
Aspects of a method and system for channel estimation in a SM MIMO communication system may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas. A plurality of baseband combined channel estimates based on phase rotation may be generated in response to the received plurality of spatially multiplexed communication signals. An estimate of the channel matrix may be determined based on the baseband combined channel estimates. A plurality of amplitude and phase correction signals may be generated in response to receiving the estimate of the channel matrix. An amplitude and a phase of at least a portion of the received plurality of spatially multiplexed communication signals may be adjusted based on the generated plurality of amplitude and phase correction signals, respectively.

Method And System For Diversity And Mask Matching In Channel Estimation In Ofdm Communication Networks Using Circular Convolution

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US Patent:
8634487, Jan 21, 2014
Filed:
Sep 14, 2012
Appl. No.:
13/617245
Inventors:
Mark Kent - Vista CA,
Uri Landau - San Diego CA,
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04K 1/10
US Classification:
375260, 375346
Abstract:
A mobile device in an OFDM system receives an OFDM signal comprising RS tones and data OFDM symbols. The received RS tones are extracted for channel estimation using a masking operation. Masking parameters are determined by matching channel time variance using corresponding time domain samples of the extracted RS tones. As approximated channel impulse responses of transmission channels, the time samples are masked to perform the channel estimation. The channel time variance comprising inter-carrier interference and delay spread are measured, respectively. A mean of differences in power between neighbor adjacent subcarriers of the extracted RS tones is used for the inter-carrier interference measurement. The delay spread measurement such as root-mean-squared (RMS) delay spread is calculated using the approximated channel impulse responses. Masking parameters are determined based on the inter-carrier measurement and the RMS-DS measurement for generating channel estimates by masking the approximated channel impulse responses.

Method And System For Determining Synchronization Status In A Wide Band Cdma Network

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US Patent:
8626226, Jan 7, 2014
Filed:
Oct 5, 2010
Appl. No.:
12/897972
Inventors:
Mark Kent - Vista CA,
Uri M Landau - San Diego CA,
Vinko Erceg - Cardiff CA,
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04B 7/00
H04B 1/00
US Classification:
455522, 455 69, 4551271
Abstract:
A method and system for determining synchronization status in a wide band CDMA (WCDMA) network may comprise calculating a signal to noise ratio (SNR) of a downlink dedicated physical channel (DPCH) based on a plurality of transmit power control (TPC) bits received via the downlink dedicated physical channel (DPCH), wherein the value of at least one of the plurality of TPC bits is not known when at least one of the plurality of TPC bits is received. The transmit circuitry may be controlled based on the calculated signal to noise ratio. The transmit circuitry may be disabled if the calculated SNR of the plurality of TPC bits is below a first channel threshold. The transmit circuitry may be enabled if the calculated SNR of the plurality of TPC bits is above a second channel threshold.

Method And System For Controlling And Regulating Services And Resources In High-Performance Downlink Channels

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US Patent:
8606287, Dec 10, 2013
Filed:
Aug 15, 2007
Appl. No.:
11/839363
Inventors:
Uri Landau - San Diego CA,
Mark Kent - Vista CA,
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04W 72/00
US Classification:
4554521, 455450, 455451, 370329, 370330
Abstract:
Aspects of a method and system for controlling and regulating services and resources in high-performance downlink channels may include receiving, at a second communication device, from a first communication device, one or more process data packets. For one or more feedback classes, at least one feedback message may be generated from the one or more process data packets associated with a process that may be associated with the one or more feedback classes. One or more feedback messages may be generated from the at least one generated feedback message and transmitted from the second communication device to the first communication device.
Uri M Landau from San Diego, CA, age ~80 Get Report