Patents by Inventor Ardavan Maleki Tehrani
Ardavan Maleki Tehrani 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).
-
Publication number: 20150071336Abstract: In accordance with embodiments disclosed herein, there are provided methods, systems, mechanisms, techniques, and apparatuses for diagnosing and optimizing vectored DSL lines.Type: ApplicationFiled: March 19, 2012Publication date: March 12, 2015Applicant: ADAPTIVE SPECTRUM AND SIGNAL ALIGNMENT, INC.Inventors: Kenneth Kerpez, Mehdi Mohseni, Wonjong Rhee, Stefano Galli, Georgios Ginis, Ardavan Maleki Tehrani, Marc Goldburg
-
Publication number: 20150016260Abstract: In accordance with embodiments disclosed herein, there are provided methods, systems, mechanisms, techniques, and apparatuses for traffic aggregation on multiple WAN backhauls and multiple distinct LAN networks; for traffic load balancing on multiple WAN backhauls and multiple distinct LAN networks; and for performing self-healing operations utilizing multiple WAN backhauls serving multiple distinct LAN networks.Type: ApplicationFiled: December 5, 2011Publication date: January 15, 2015Applicant: Adaptive Spectrum and Signal Alignment, Inc.Inventors: Peter Chow, Ramya Bhagavatula, Wonjong Rhee, Ardavan Maleki Tehrani, John Cioffi, Stefano Galli, Sungho Yun, Kenneth Kerpez, Marc Goldburg
-
Publication number: 20140376370Abstract: In accordance with embodiments disclosed herein, there are provided methods, systems, mechanisms, techniques, and apparatuses for traffic aggregation on multiple WAN backhauls and multiple distinct LAN networks; for traffic load balancing on multiple WAN backhauls and multiple distinct LAN networks; and for performing self-healing operations utilizing multiple WAN backhauls serving multiple distinct LAN networks. For example, in one embodiment, a first Local Area Network (LAN) access device is to establish a first LAN; a second LAN access device is to establish a second LAN; a first Wide Area Network (WAN) backhaul connection is to provide the first LAN access device with WAN connectivity; a second WAN backhaul connection is to provide the second LAN access device with WAN connectivity; and a traffic aggregation unit is to form a logically bonded WAN interface over the first WAN backhaul and the second WAN backhaul. In some embodiments an optional traffic de-aggregation unit may be used.Type: ApplicationFiled: December 5, 2011Publication date: December 25, 2014Applicant: ADAPTIVE SPECTRUM AND SIGNAL ALIGNMENT, INC.Inventors: John Cioffi, Ardavan Maleki Tehrani, Wonjong Rhee, Ramya Bhagavatula, Peter Chow, Kenneth Kerpez, Stefano Galli, Marc Goldburg, Sungho Yun
-
Publication number: 20140334609Abstract: A probing signal transmitted on a twisted pair telephone line in a DSL system is reflected and received at a DSL device. An estimate of one of a DSL data transmission signal or DSL synch symbol transmission signal is removed from the received probing signal to recover the reflected probing signal. The recovered reflected probing signal is processed to determine characteristics information of the twisted pair telephone line.Type: ApplicationFiled: July 25, 2014Publication date: November 13, 2014Applicant: Adaptive Spectrum and Signal Alignment, Inc.Inventors: Mark B. Flowers, Mark H. Brady, Marc Goldburg, Mark P. Mallory, Ardavan Maleki Tehrani
-
Publication number: 20140321298Abstract: Described are systems and methods for jointly optimizing Wide Area Network (WAN) and Local Area Network (LAN) network communications. In one embodiment, a management device communicatively interfaced with a WAN and a LAN includes a collection module to collect LAN information from the LAN and WAN information from the WAN; an analysis module to jointly analyze the collected WAN information and the collected LAN information to identify an operational condition; and an implementation module to initiate a management event responsive to the operational condition being identified. In one embodiment, the management event includes generating and transmitting a diagnostics report responsive to a fault being identified. The management device may further generate and execute instructions to remedy the diagnosed fault.Type: ApplicationFiled: January 12, 2011Publication date: October 30, 2014Applicant: Adaptive Spectrum and Signal Alignment, Inc.Inventors: Peter Chow, Wonjong Rhee, Ardavan Maleki Tehrani, Marc Goldburg
-
Patent number: 8792620Abstract: A probing signal transmitted on a twisted pair telephone line in a DSL system is reflected and received at a DSL device. An estimate of one of a DSL data transmission signal or DSL synch symbol transmission signal is removed from the received probing signal to recover the reflected probing signal. The recovered reflected probing signal is processed to determine characteristics information of the twisted pair telephone line.Type: GrantFiled: May 10, 2010Date of Patent: July 29, 2014Assignee: Adaptive Spectrum and Signal Alignment, Inc.Inventors: Mark B. Flowers, Mark H. Brady, Marc H. Goldburg, Mark P. Mallory, Ardavan Maleki Tehrani
-
Publication number: 20140098705Abstract: Described are systems and methods for a Digital Subscriber Line (DSL) customer premises equipment (CPE) Management Center (CMC). In one embodiment, the CMC includes a communications interface to receive information from the CPE device regarding operation of the CPE device. The received information is analyzed and a command signal generation module generates a corresponding command signal for transmission to the at least one CPE device to modify the CPE device operation based on the analysis results in a manner which either enhances CPE device performance, for example increasing data rate, or improves line stability, for example reducing CPE error rate.Type: ApplicationFiled: December 30, 2010Publication date: April 10, 2014Applicant: Adaptive Spectrum and Signal Alignment, Inc.Inventors: Peter Chow, Wonjong Rhee, Ardavan Maleki Tehrani, Marc Goldburg, Georgios Ginis, Mehdi Mohseni
-
Patent number: 8599953Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.Type: GrantFiled: October 28, 2011Date of Patent: December 3, 2013Assignee: QUALCOMM IncorporatedInventors: Qinfang Sun, Won-Joon Choi, Jeffrey M. Gilbert, Ardavan Maleki Tehrani
-
Publication number: 20130170629Abstract: A probing signal transmitted on a twisted pair telephone line in a DSL system is reflected and received at a DSL device. An estimate of one of a DSL data transmission signal or DSL synch symbol transmission signal is removed from the received probing signal to recover the reflected probing signal. The recovered reflected probing signal is processed to determine characteristics information of the twisted pair telephone line.Type: ApplicationFiled: May 10, 2010Publication date: July 4, 2013Applicant: Adaptive Spectrum and Signal Alignment, Inc.Inventors: Mark B. Flowers, Mark H. Brady, Marc H. Goldburg, Mark P. Mallory, Ardavan Maleki Tehrani
-
Publication number: 20130022178Abstract: A method for detecting a defect in wiring in a DSL system. The method includes collecting data including instantaneous values, a history of values, and/or parameters relating to a central office or customer premises equipment, analyzing a line for a wiring defect based on the collected data, and reporting whether or not a wiring defect was detected responsive to the analyzing step.Type: ApplicationFiled: November 25, 2009Publication date: January 24, 2013Inventors: Wonjong Rhee, Ardavan Maleki Tehrani, Mehdi Mohseni, George Ginis, Haibo Zhang, Sun-Uk Park
-
Publication number: 20120134397Abstract: A Digital Subscriber Line (DSL) Management Center (DMC) coupled to a DSL network includes a data collection module that receives information regarding the DSL network from a plurality of sources. An analysis module is coupled to the data collection module to analyze the received information and issue a command for one or more of a plurality of DSL performance enhancement devices to optimize their operation. A command signal generation module is coupled to the analysis module to receive the issued command from the analysis module and generate a corresponding command signal for transmission to one or more of the DSL performance enhancement devices.Type: ApplicationFiled: July 1, 2009Publication date: May 31, 2012Inventors: John Cioffi, Mark Flowers, Mark Brady, Ardavan Maleki Tehrani, Marc Goldburg, George Ginis, Peter Silverman
-
Publication number: 20120039377Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.Type: ApplicationFiled: October 28, 2011Publication date: February 16, 2012Applicant: Qualcomm Atheros, Inc.Inventors: Qinfang Sun, Won-Joon Choi, Jeffrey M. Gilbert, Ardavan Maleki Tehrani
-
Patent number: 8073072Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.Type: GrantFiled: September 29, 2009Date of Patent: December 6, 2011Assignee: Qualcomm Atheros, Inc.Inventors: Qinfang Sun, Won-Joon Choi, Jeffrey M. Gilbert, Ardavan Maleki Tehrani
-
Patent number: 7924932Abstract: A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between good and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.Type: GrantFiled: November 9, 2009Date of Patent: April 12, 2011Assignee: Atheros Communications, Inc.Inventors: John S. Thomson, Paul J. Husted, Ardavan Maleki Tehrani, Jeffrey M. Gilbert, William J. McFarland, Lars E. Thon, Yi-Hsiu Wang
-
Patent number: 7672220Abstract: The present invention provides an apparatus and method of multiple antenna receiver combining of high data rate wideband packetized wireless communication signals, where the apparatus includes M receive antennas, receiving M high data rate wideband packetized wireless communication signals, where each of the signals includes N frequency bins. The apparatus, in an exemplary embodiment, includes (1) a joint timing recovery units that perform joint coarse signal timing estimation, joint frequency offset estimation, and joint fine timing estimation on each of the signals, (2) M Fast Fourier Transform units (FFTs) that each convert the digital data for each of the M signals into frequency domain information for each of the N received frequencies and that output Q pilots for each of the signals, where Q is a positive integer, and (3) a combiner that weights and combines the outputs of the M FFTs for each of the N received frequencies.Type: GrantFiled: March 6, 2008Date of Patent: March 2, 2010Assignee: Atheros Communications, Inc.Inventors: Ardavan Maleki Tehrani, Won-Joon Choi, Jeffrey M. Gilbert, Yi-Hsiu Wang
-
Publication number: 20100014504Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.Type: ApplicationFiled: September 29, 2009Publication date: January 21, 2010Inventors: Qinfang Sun, Won-Joon Choi, Jeffrey M. Gilbert, Ardavan Maleki Tehrani
-
Patent number: 7636400Abstract: A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.Type: GrantFiled: January 10, 2007Date of Patent: December 22, 2009Assignee: Atheros Communications, Inc.Inventors: John S. Thomson, Paul J. Husted, Ardavan Maleki Tehrani, Jeffrey M. Gilbert, William J. McFarland, Lars E. Thon, Yi-Hsiu Wang
-
Patent number: 7616698Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.Type: GrantFiled: November 3, 2004Date of Patent: November 10, 2009Assignee: Atheros Communications, Inc.Inventors: Qinfang Sun, Won-Joon Choi, Jeffrey M. Gilbert, Ardavan Maleki Tehrani
-
Patent number: 7463704Abstract: A wireless local area network (WLAN) system can have multiple antennas to improve signal detection and decoding. A WLAN receiver in such a system includes multiple amplifiers that can appropriately size an incoming signal and an automatic gain control unit to process the received incoming signals. The amplifiers of a chain of the WLAN receiver, i.e. an antenna and associated receiver components, can be adjusted with computed gains. To optimize the wireless system detection and decoding, the automatic gain control unit can advantageously compute these gains for each amplifier in the WLAN receiver.Type: GrantFiled: July 1, 2004Date of Patent: December 9, 2008Assignee: Atheros Communications, Inc.Inventors: Ardavan Maleki Tehrani, Xiaoru Zhang, Paul J. Husted, Jeffrey M. Gilbert
-
Patent number: 7129884Abstract: A radar detection technique in a WLAN device can include a short pulse detection technique and a long pulse detection technique that can be performed using multiple receive chains. Short pulse detection is particularly effective when the incoming signal includes one or a limited number of main pulses and some residual pulses. In contrast, long pulse detection is particularly effective when the incoming signal is longer, thereby allowing various characteristics of the incoming signal to be accurately measured.Type: GrantFiled: July 1, 2004Date of Patent: October 31, 2006Assignee: Atheros Communications, Inc.Inventors: Ardavan Maleki Tehrani, Xiaoru Zhang, Paul J. Husted, Jeffrey M. Gilbert