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Inventor:
Amerga; Messay
Address:
San Diego, CA
No. of patents:
33
Patents:












Patent Number Title Of Patent Date Issued
8145132 Method and apparatus for reducing frequency space from frequency search March 27, 2012
A method and apparatus for reducing frequency space from code space search is disclosed in a wireless network. The method and apparatus reduces the frequency space without compromising the probability of detection, so that user equipment can expedite system acquisition and reduce pow
8139542 Cell timing acquisition in a W-CDMA hard handover March 20, 2012
Cell timing is detected by first trying to detect a target handover cell through detecting a primary synchronization channel (P-SCH) followed by a common pilot channel (CPICH). If that fails, N number of retrials is performed using a full-window search on the CPICH. The full-window CPICH
8098780 Rake receiver finger assignment based on signal path concentration January 17, 2012
A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment
8068834 Intra-frequency, inter-frequency and inter-radio access technology searching for neighbor cells November 29, 2011
Techniques for searching neighbor cells within a fixed time duration are disclosed. In one embodiment, cells in a monitored list are ranked. A first subset of the ranked cells are searched during each cycle in a series of cycles, and a subset of the remainder of ranked cells is searc
8045981 System search to detect for a wireless communication network in a crowded frequency band October 25, 2011
Techniques for efficiently performing system search to obtain service from a wireless system as quickly as possible are described. A terminal initially looks for service from a first (e.g., W-CDMA) system. The terminal identifies network(s) in the first system from which service was
7986661 Efficient utilization of transmission gaps for cell measurements July 26, 2011
A terminal communicates with a first wireless network and obtains a list of cells in a second wireless network to measure. The terminal operates in a compressed mode and receives multiple transmission gap pattern sequences for different measurement purposes, e.g., RSSI measurements,
7953401 Methods and apparatus for out of service processing with varied behaviors May 31, 2011
Methods and apparatus for out of service processing with varied behaviors. In an aspect, a method is provided for service acquisition. The method includes determining one or more conditions, wherein each condition is associated with at least one weight, detecting whether an out-of-se
7917163 Intra-frequency searching in the presence of frequency gaps March 29, 2011
Techniques for intra-frequency searching in the presence of frequency gaps are disclosed. In one embodiment, a search is scheduled and frequency switches are suppressed during the scheduled search. In another embodiment, a search is scheduled in between anticipated frequency gaps. In
7877100 Position determination system that uses A cellular communication system January 25, 2011
A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements
7734264 System frame number (SFN) evaluator June 8, 2010
An access terminal (102) reacquires a system frame number (SFN) when a difference between a continuous counter elapsed time (220) and a calculated elapsed time (222) exceeds a threshold. The continuous counter elapsed time (220) is generated by a continuous counter (122) remaining ac
7729412 Parameter estimator with dynamically variable integration time June 1, 2010
A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base
7693241 Rake receiver finger assignment based on signal path concentration April 6, 2010
A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment
7593367 Frequency scan for CDMA acquisition September 22, 2009
Techniques for reducing the time required for frequency scan in acquisition are disclosed. In one aspect, received power measurements are made at one or more of the possible carrier frequencies and system search is performed on one or more of those frequencies when the power measurem
7580450 Parameter estimator with dynamically variable integration time August 25, 2009
A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base
7558534 Reliability metrics for parameter estimates which account for cumulative error July 7, 2009
A method of producing a reliability metric for a parameter estimate derived from a signal using correlation analysis is described. The method begins by obtaining an indication of whether a non line of sight signal condition is present or likely and/or obtaining an indication of whether
7369534 Reducing search time using known scrambling code offsets May 6, 2008
Techniques for reducing search time using known scrambling code offsets are disclosed. In one embodiment, a plurality of search results is generated by correlating a received signal with a synchronization sequence. The plurality of search results is reduced by removing any results wh
7340268 Reliability determination and combining of power control commands received in a wireless communi March 4, 2008
The reliability of transmit power control (TPC) commands received from a transmitter is determined based on a TPC target value. The TPC target value is derived based on a TPC threshold and possibly a weight, depending on the receiver implementation. A received TPC command is consider
7308022 Parameter estimator configured to distinguish between peaks and sidelobes of correlation functio December 11, 2007
A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) are present, and, if so, distinguishable from the sidelobe(s) of
7286801 Maintaining and searching sets of cells in a wireless communication system October 23, 2007
For cell measurement, a wireless device categorizes cells whose identities are known to the device into multiple sets. The wireless device may obtain these cells from the system via signaling and/or detect these cells via searches. Different sets of cells may be associated with diffe
7190750 Rake receiver for tracking closely spaced multipath March 13, 2007
Techniques for tracking closely spaced multipath and preventing finger merge without monitoring relative positions between each of a plurality of fingers are disclosed. In one aspect, motion limits are determined for each finger. Time-tracking commands that would move the position of a
7133702 Idle mode cell reacquisition and reselection November 7, 2006
Techniques for cell reacquisition and reselection that increases time spent in low-power mode while effectively monitoring neighbor cells are disclosed. In one aspect, one or more windows around the expected location of the serving cell are searched in the period of time prior to the
7110765 Limiting cell reselection based on pilot power September 19, 2006
Techniques for limiting cell reselection in response to a variable channel are disclosed. In one aspect, a measurement of received pilot power from a base station is used as an indication of channel quality. In another aspect, hysteresis is applied to limit cell reselection, wherein the
7085537 System and method for the detection and compensation of radio signal time of arrival errors August 1, 2006
A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses
7039418 Position determination in a wireless communication system with detection and compensation for re May 2, 2006
Techniques to detect whether or not a remote terminal is under the coverage of a repeater within a wireless communication network, which may be based on (1) a list of base stations expected to be received while under the repeater's coverage, (2) the characterized environment of the r
6944143 Prioritization of searching by a remote unit in a wireless communication system September 13, 2005
A method and apparatus for improving searching in a remote unit of a slotted mode, wireless, communication system. In a slotted mode communication system, the remote unit enters an "active state" during its assigned slot. While in the active state, a controller in the remote unit pas
6819931 Method and apparatus for assigning tracking elements to received signals November 16, 2004
A method for assigning tracking elements includes sorting a list of potential assignments according to a diversity criterion. In one example, a list of received signal instances is sorted first according to a measure of energy and then sorted again according to the diversity criterion. I
6804494 System and method for the detection and compensation of radio signal time of arrival errors October 12, 2004
A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses
6785554 Modified finger assignment algorithm for high data rate calls August 31, 2004
A method and communication system for assigning the plurality of fingers to demodulation paths in a path list which insures that at least one finger will be assigned to a demodulation path supporting a supplemental channel, if one exists. The method involves determining whether any of th
6738438 Parameter estimator with dynamically variable search window size and/or placement May 18, 2004
A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable search window is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base
6731676 Assigning clusters of demodulation elements in a spread spectrum system May 4, 2004
An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, may add one or more additional "virtual" paths to a list of candidate paths when assigning demodulation elements. These "virtual" paths are added as candidate paths even though a
6711420 Modified finger assignment algorithm for high data rate calls March 23, 2004
A method of creating a path list for use in finger assignments comprising clearing a list of paths (12), choosing a sector for consideration from an active set of sectors (14), establishing a searcher window around the sector for cosideration (16), and determining up to "n" local maxima
6650912 Selecting paging channel mode November 18, 2003
A quick paging channel (QPCH) is used to receive paging indicators that indicate that a wireless communication device (WCD) has a message on a paging channel relating to, for example, an incoming call to the WCD. When the condition of the quick paging channel is too low to receive paging
6574483 Modified finger assignment algorithm for high data rate calls June 3, 2003
A method and communication system for assigning the plurality of fingers to demodulation paths in a path list which insures that at least one finger will be assigned to a demodulation path supporting a supplemental channel, if one exists. The method involves determining whether any of th










 
 
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