Patents by Inventor Walid E. Nabhane
Walid E. Nabhane has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8965440Abstract: In the method, a current channel condition is estimated based at least in part on a previous channel quality indicator and power control information received after the previous channel quality indicator.Type: GrantFiled: May 31, 2005Date of Patent: February 24, 2015Assignee: Alcatel LucentInventors: Francis Dominique, Hongwel Kong, Walid E. Nabhane
-
Patent number: 8086257Abstract: In a method of detecting a signal, a control channel associated with a physical channel may be decoded to produce at least one decoding metric. A control channel signal on the control channel may then be detected based on the decoding metric.Type: GrantFiled: August 11, 2005Date of Patent: December 27, 2011Assignee: Alcatel LucentInventors: Rainer Bachl, Francis Dominique, Hongwei Kong, Walid E. Nabhane
-
Patent number: 7929510Abstract: A method of scaling soft symbols of an uplink E-DCH is provided, where the E-DCH is received from a user in a network for processing in a base station receiver in the network employing a log-MAP turbo decoding algorithm to process the E-DCH. The E-DCH includes an E-DPDCH from which the soft symbols are generated at the base station receiver, and an E-DPCCH used to transmit control information associated with the E-DPDCH, which along with configuration information from a radio network controller (RNC) of the network enables the base station receiver to determine a reference amplitude ratio linked to the actual power offset of the E-DPDCH from the legacy DPCCH. In the method, an estimated E-DPDCH to DPCCH amplitude ratio that represents a scaling factor for the soft symbols is determined, and the soft symbols are scaled by the scaling factor to enable the soft symbols to be processed by the log-MAP turbo decoding algorithm in the base station receiver.Type: GrantFiled: February 28, 2007Date of Patent: April 19, 2011Assignee: Alcatel-Lucent USA Inc.Inventors: Francis Dominique, Hongwei Kong, Walid E. Nabhane
-
Patent number: 7809090Abstract: In a method for determining a transmitted data rate, a received data frame may be decoded using different candidate rates to generate a first decoded bit sequence associated with each candidate rate. A first frame quality indicator and a first error metric may be generated for each of the candidate rates based on the associated first decoded bit sequence and a decoding metric for the associated first decoded bit sequence. One of the candidate rates may be selected as the transmitted data rate based on the first frame quality indicators, the first error metrics and an error metric threshold.Type: GrantFiled: December 28, 2005Date of Patent: October 5, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Francis Dominique, Hongwei Kong, Walid E. Nabhane, Ashok Armen Tikku
-
Patent number: 7733988Abstract: A plurality of decoding metrics for a current frame may be generated based on a correlation set for a current frame and a correlation set for at least one previous frame. Whether a signal is present on a control channel may then be determined based on the generated decoding metrics.Type: GrantFiled: October 28, 2005Date of Patent: June 8, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Rainer Bachl, Francis Dominique, Hongwei Kong, Walid E. Nabhane
-
Patent number: 7647050Abstract: A method of adjusting a power level of communications over a channel in a wireless communications network. In the method, a determination (e.g., by a radio network controller (RNC)) is made regarding a number of base stations actively communicating with a mobile station. For example, the determination may indicate whether the mobile station is engaged in soft handoff or simplex mode. One of a plurality of power control algorithms (e.g., a fixed offset power control algorithm, a channel quality indicator (CQI) power control algorithm, etc.) is selected based on the determination. A power level of communications over the channel (e.g., a downlink communications channel to the mobile station) is then adjusted in accordance with the selected power control algorithm.Type: GrantFiled: December 28, 2005Date of Patent: January 12, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Francis Dominique, Ali Masoomzadeh-Fard, Martin H. Meyers, Walid E. Nabhane
-
Patent number: 7565594Abstract: The need for separate CRC bits is eliminated by taking advantage of what has been determined to be an embedded error detection capability in a turbo code itself to perform error detection following turbo decoding. Specifically, since the two constituent encoders of a turbo encoder that are used to encode a data packet produce two systematic codes that share the same systematic bits one code, one is used to serve as the parity check for the other. The sign of the log likelihood ratio (LLR) of each systematic bit in a block of decoded data calculated at the end of a turbo decoding cycle is compared with the sign of the LLR of each corresponding bit that was calculated at a previous turbo decoding cycle. If the signs of the LLRs for each comparison do not agree, then a packet error is determined to have occurred; otherwise no packet error is detected.Type: GrantFiled: August 26, 2004Date of Patent: July 21, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Francis Dominique, Hongwei Kong, Walid E Nabhane
-
Patent number: 7519382Abstract: In a method of controlling transmit power for a user call migrating between a first entity and a second entity in a base station of a wireless communication system, power control may be performed, as a call of the user is migrated from the first to the second entity, or vice versa, based on an adjustment ratio value. Parameters for balancing transmit power as the user call is migrated from the first entity to the second entity may be selected so that any difference in transmit power does not adversely affect system performance.Type: GrantFiled: March 31, 2005Date of Patent: April 14, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Francis Dominique, Hongwel Kong, Walid E. Nabhane
-
Publication number: 20080205329Abstract: A method of scaling soft symbols of an uplink E-DCH is provided, where the E-DCH is received from a user in a network for processing in a base station receiver in the network employing a log-MAP turbo decoding algorithm to process the E-DCH. The E-DCH includes an E-DPDCH from which the soft symbols are generated at the base station receiver, and an E-DPCCH used to transmit control information associated with the E-DPDCH, which along with configuration information from a radio network controller (RNC) of the network enables the base station receiver to determine a reference amplitude ratio linked to the actual power offset of the E-DPDCH from the legacy DPCCH. In the method, an estimated E-DPDCH to DPCCH amplitude ratio that represents a scaling factor for the soft symbols is determined, and the soft symbols are scaled by the scaling factor to enable the soft symbols to be processed by the log-MAP turbo decoding algorithm in the base station receiver.Type: ApplicationFiled: February 28, 2007Publication date: August 28, 2008Inventors: Francis Dominique, Hongwei Kong, Walid E. Nabhane
-
Publication number: 20080205328Abstract: A method of scaling soft symbols of an uplink E-DCH is provided, where the E-DCH is received from a user in a network for processing in a base station receiver in the network employing a log-MAP turbo decoding algorithm to process the E-DCH. The E-DCH includes an E-DPDCH from which the soft symbols are generated at the base station receiver, and an E-DPCCH used to transmit control information associated with the E-DPDCH, which along with configuration information from a radio network controller (RNC) of the network enables the base station receiver to determine a reference amplitude ratio linked to the actual power offset of the E-DPDCH from the legacy DPCCH. In the method, a reference E-DPDCH to DPCCH amplitude ratio is multiplied by a value greater than 1 to output a scaling factor, and the soft symbols are scaled by the scaling factor for processing by the log-MAP turbo decoding algorithm in the base station receiver.Type: ApplicationFiled: February 28, 2007Publication date: August 28, 2008Inventors: Francis Dominique, Hongwei Kong, Walid E. Nabhane
-
Patent number: 7181235Abstract: An algorithm calculates a correction value to be applied to a slot in an adjustment period for power correction. The adjustment period is divided into segments having a plurality of slots, and a target power value is determined for each segment. For each slot, the algorithm determines whether adding a correction value in a given slot would bring the actual accumulative adjustment value closer or farther from the target power value for the segment corresponding to the given slot. The correction value is added to consecutive slots in the segment. The algorithm also checks the total amount of adjustment applied to the slots over a sliding adjustment window to make sure that the total amount of adjustment applied to the slots in the window do not exceed a predetermined maximum threshold.Type: GrantFiled: March 10, 2003Date of Patent: February 20, 2007Assignee: Lucent Technologies Inc.Inventors: Xiaohua Chen, Walid E. Nabhane, Alexandro Salvarani
-
Patent number: 7155250Abstract: An algorithm calculates a correction value to be applied to a slot in an adjustment period for power correction. For each slot, the algorithm determines whether adding a correction value in a given slot would bring the actual accumulative adjustment value closer or farther from a total desired power correction value for the adjustment period. In one embodiment, the correction value is added to consecutive slots in the adjustment period to conduct the correction as fast as possible. The algorithm also checks the total amount of adjustment applied to the slots over a sliding adjustment window within the adjustment period to make sure that the total amount of adjustment applied to the slots in the adjustment window do not exceed a predetermined maximum threshold.Type: GrantFiled: March 10, 2003Date of Patent: December 26, 2006Assignee: Lucent Technologies Inc.Inventors: Xiaohua Chen, Walid E. Nabhane, Alexandro Salvarani
-
Patent number: 7123931Abstract: An algorithm calculates a correction value to be applied to a slot in an adjustment period for power correction. For each slot, the algorithm determines whether adding a correction value in a given slot would bring the actual accumulative adjustment value closer or farther from an accumulative adjustment target value. The accumulative adjustment target value has a linear relationship with the slot number and is calculated for each slot to ensure that any corrections are evenly distributed over the adjustment period for a smooth correction. In one embodiment, the algorithm also checks the total amount of adjustment applied to the slots over a sliding adjustment window to make sure that the total amount of adjustment applied to the slots in the adjustment window do not exceed a predetermined maximum threshold.Type: GrantFiled: March 10, 2003Date of Patent: October 17, 2006Assignee: Lucent Technologies Inc.Inventors: Xiaohua Chen, Walid E. Nabhane, Alexandro Salvarani
-
Publication number: 20040209636Abstract: An algorithm calculates a correction value to be applied to a slot in an adjustment period for power correction. For each slot, the algorithm determines whether adding a correction value in a given slot would bring the actual accumulative adjustment value closer or farther from an accumulative adjustment target value. The accumulative adjustment target value has a linear relationship with the slot number and is calculated for each slot to ensure that any corrections are evenly distributed over the adjustment period for a smooth correction. In one embodiment, the algorithm also checks the total amount of adjustment applied to the slots over a sliding adjustment window to make sure that the total amount of adjustment applied to the slots in the adjustment window do not exceed a predetermined maximum threshold.Type: ApplicationFiled: March 10, 2003Publication date: October 21, 2004Inventors: Xiaohua Chen, Walid E. Nabhane, Alexandro Salvarani
-
Publication number: 20040180684Abstract: An algorithm calculates a correction value to be applied to a slot in an adjustment period for power correction. The adjustment period is divided into segments having a plurality of slots, and a target power value is determined for each segment. For each slot, the algorithm determines whether adding a correction value in a given slot would bring the actual accumulative adjustment value closer or farther from the target power value for the segment corresponding to the given slot. The correction value is added to consecutive slots in the segment. The algorithm also checks the total amount of adjustment applied to the slots over a sliding adjustment window to make sure that the total amount of adjustment applied to the slots in the window do not exceed a predetermined maximum threshold.Type: ApplicationFiled: March 10, 2003Publication date: September 16, 2004Inventors: Xiaohua Chen, Walid E. Nabhane, Alexandro Salvarani
-
Publication number: 20040180685Abstract: An algorithm calculates a correction value to be applied to a slot in an adjustment period for power correction. For each slot, the algorithm determines whether adding a correction value in a given slot would bring the actual accumulative adjustment value closer or farther from a total desired power correction value for the adjustment period. In one embodiment, the correction value is added to consecutive slots in the adjustment period to conduct the correction as fast as possible. The algorithm also checks the total amount of adjustment applied to the slots over a sliding adjustment window within the adjustment period to make sure that the total amount of adjustment applied to the slots in the adjustment window do not exceed a predetermined maximum threshold.Type: ApplicationFiled: March 10, 2003Publication date: September 16, 2004Inventors: Xiaohua Chen, Walid E. Nabhane, Alexandro Salvarani
-
Patent number: 6590945Abstract: A simplified method for frequency offset estimation in a TDMA cellular PCS environment using &pgr;/4-shifted DQPSK comprises the steps of multiplying a complex conjugate of a received complex-valued symbol and a succeeding symbol to produce a comparison vector having an angle equal to the phase angle between the received complex-valued symbol and the succeeding symbol, rotating the comparison vector so that the angle thereof is between 0° and 90°, and estimating the frequency offset by determining a constant deviation of the phase angle from an ideal phase angle value of 45° by calculating an average phase angle for a plurality of successive comparison vectors or correlating the rotated comparision vector against a bank of unit vectors to determine a maximum correlation.Type: GrantFiled: July 13, 1999Date of Patent: July 8, 2003Assignee: Lucent Technologies Inc.Inventors: Nima Brardjanian, Yong J. Lee, Walid E. Nabhane, Mohsen Sarraf, Sheng-Jen Tsai