Patents by Inventor Abu Amanullah
Abu Amanullah 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).
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Patent number: 9135208Abstract: Systems and methods for group management in machine-to-machine networks are provided. Network nodes in a network group are divided into sub-groups and a group information register, which includes a listing of the nodes in the group, is divided into an equal number of partitions. The partitions are distributed to the sub-groups such that each node in a given sub-group receives the same partition. The partitions are accompanied by references to network nodes of other sub-groups (termed “anchor nodes”) that have a copy of another partition of the group information register. When a new network head takes over the network group, it is able to use the available partitions to determine which partitions are missing and which nodes hold copies of the missing partitions. The group head can wake up the missing nodes and obtain the missing partition copies, thereby generating a complete copy of the group information register.Type: GrantFiled: April 13, 2012Date of Patent: September 15, 2015Assignee: Olympus CorporationInventors: Rongsheng Huang, Dumitru Mihai Ionescu, Abu Amanullah, Lichung Chu
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Patent number: 8761307Abstract: A communications device and receiver system and method to efficiently distribute functions among radio frequency (RF), analog front end (AFE) and baseband modules for ultra-low power consumption comprising a wideband receiver subsystem selectively coupled to a signal input receiving a first frequency band, a narrowband received subsystem selectively coupled to the signal input receiving a second frequency band and, a controller configured to monitor the first frequency band using the first receiver subsystem and if a wake up signal is detected using the first receiver subsystem, connect the second receiver subsystem to the signal input and tune the second receiver subsystem to a channel transmitting the wake up signal, the wake up signal including channel selection information defining the channel for subsequent communications. Wherein, the two frequency bands overlap and center on different frequencies.Type: GrantFiled: June 8, 2011Date of Patent: June 24, 2014Assignee: Olympus CorporationInventors: Dumitru Mihai Ionescu, Ivan Krivokapic, Abu Amanullah, Haidong Zhu, Lichung Chu
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Publication number: 20140019828Abstract: An efficient method and transceiver architecture combines elements to enable and facilitate the low power operation of a communications device; the combination of design elements, features, and functionalities are efficiently distributed among RF, APE, and baseband modules in order to exploit opportunities that can serve the goal of low or ultra low power consumption.Type: ApplicationFiled: June 27, 2013Publication date: January 16, 2014Applicant: Olympus CorporationInventors: DUMITRU MIHAI IONESCU, Ivan Krivokapic, Abu Amanullah, Haidong Zhu, Lichung Chu
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Patent number: 8576961Abstract: A method for determining an overlap and add length estimate comprises determining a plurality of correlation values of a plurality of ordered frequency domain samples obtained from a data frame; comparing the correlation values of a first subset of the samples to a first predetermined threshold to determine a first edge sample; comparing the correlation values of a second subset of the samples to a second predetermined threshold to determine a second edge sample; using the first and second edge samples to determine an overlap and add length estimate; and providing the overlap and add length estimate to an overlap and add circuit.Type: GrantFiled: June 15, 2009Date of Patent: November 5, 2013Assignee: Olympus CorporationInventors: Haidong Zhu, Dumitru Mihai Ionescu, Abu Amanullah
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Patent number: 8422483Abstract: The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more channel estimates or channel observables can be combined to compute a refined channel estimate, for example, when the channel estimates or channel observables are from the same channel.Type: GrantFiled: March 30, 2007Date of Patent: April 16, 2013Assignee: Olympus CorporationInventors: Ghobad Heidari-Bateni, Abu Amanullah, Dumitru Mihai Ionescu
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Patent number: 8345783Abstract: Phase tracking in an OFDM symbol comprises determining a sufficient statistic for CFO and SFO estimation from a differential metric between a current OFDM symbol and a previous OFDM symbol transmitted on the same frequency band. The sufficient statistics corresponding to positive pilot tones are combined with those corresponding to negative pilot tones to estimate the CFO and SFO.Type: GrantFiled: March 31, 2011Date of Patent: January 1, 2013Assignee: Olympus CorporationInventors: Dumitru Mihai Ionescu, Haidong Zhu, Abu Amanullah
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Publication number: 20120307839Abstract: A master device selects a channel from a band of channels for communications with a slave device. The master transmits information identifying the selected to the slave device using a packet modulated as a series of energy pulses on the selected channel. The slave device performs wideband energy detection on the band of channels and receives the modulated pulses. The slave device decodes the modulated pulses to retrieve the selected channel, and tunes to the selected channel for further communications.Type: ApplicationFiled: May 31, 2011Publication date: December 6, 2012Inventors: Dumitru Mihai Ionescu, Abu Amanullah, Haidong Zhu
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Patent number: 8300720Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: GrantFiled: July 7, 2011Date of Patent: October 30, 2012Assignee: Olympus CorporationInventors: Dumitru Mihai Ionescu, Abu Amanullah, Ghobad Heidari-Bateni
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Patent number: 8275390Abstract: The present invention provides systems and methods are provided to allow a network device to simultaneously monitor multiple adjacent wireless physical layer channels. If network communications are discovered on an adjacent channel, the network device may move to this adjacent channel. Accordingly, the network device is able to discover other devices or services existing on the adjacent channel, and is able to avoid interference caused by adjacent channels coexisting on the same frequency bands. After moving to the adjacent channel, a standard MAC protocol is able to regulate channel excess amongst all the network devices coexisting on the new channel.Type: GrantFiled: March 31, 2009Date of Patent: September 25, 2012Assignee: Olympus CorporationInventors: Alaa Muqattash, Abu Amanullah
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Patent number: 8077786Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: GrantFiled: April 7, 2008Date of Patent: December 13, 2011Assignee: Olympus CorporationInventors: Dumitru Mihai Ionescu, Abu Amanullah, Ghobad Heidari-Bateni
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Patent number: 8036290Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: GrantFiled: April 7, 2008Date of Patent: October 11, 2011Assignee: Olympus CorporationInventors: Dumitru Mihai Ionescu, Abu Amanullah, Ghobad Heidari-Bateni
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Patent number: 8031789Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: GrantFiled: April 7, 2008Date of Patent: October 4, 2011Assignee: Olympus CorporationInventors: Dumitru Mihai Ionescu, Abu Amanullah, Ghobad Heidari-Bateni
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Patent number: 7792217Abstract: The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more synchronization and channel estimate symbols can be combined to compute a refined channel estimate.Type: GrantFiled: March 30, 2007Date of Patent: September 7, 2010Assignee: Olympus CorporationInventors: Ghobad Heidari-Bateni, Abu Amanullah, Dumitru Mihai Ionescu
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Publication number: 20090067532Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: ApplicationFiled: April 7, 2008Publication date: March 12, 2009Inventors: DUMITRU MIHAI IONESCU, Abu Amanullah, Ghobad Heidari-Bateni
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Publication number: 20080247481Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: ApplicationFiled: April 7, 2008Publication date: October 9, 2008Inventors: DUMITRU MIHAI IONESCU, ABU AMANULLAH, GHOBAD HEIDARI-BATENI
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Publication number: 20080247480Abstract: Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.Type: ApplicationFiled: April 7, 2008Publication date: October 9, 2008Inventors: Dumitru Mihai Ionescu, Abu Amanullah, Ghobad Heidari-Bateni
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Publication number: 20080240204Abstract: The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more synchronization and channel estimate symbols can be combined to compute a refined channel estimate.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Ghobad Heidari-Bateni, Abu Amanullah, Dumitru Mihai Ionescu
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Publication number: 20080240261Abstract: The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more channel estimates or channel observables can be combined to compute a refined channel estimate, for example, when the channel estimates or channel observables are from the same channel.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Ghobad Heidari-Bateni, Abu Amanullah, Dumitru Mihai Ionescu
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Patent number: 7092686Abstract: A transmitter includes a coupler (318) to measure output power. The output power is compared to a set value and a threshold. If the power is above the threshold, the gain of an output amplifier (316) is adjusted toward the set value. If the power is below the threshold, an extrapolation of the linear portion is used to obtain the set power level.Type: GrantFiled: November 7, 2001Date of Patent: August 15, 2006Assignee: Siemens Communications, Inc.Inventors: Abu Amanullah, Antoine J. Rouphael
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Publication number: 20020127980Abstract: A transmitter includes a coupler (318) to measure output power. The output power is compared to a set value and a threshold. If the power is above the threshold, the gain of an output amplifier (316) is adjusted toward the set value. If the power is below the threshold, an extrapolation of the linear portion is used to obtain the set power level.Type: ApplicationFiled: November 7, 2001Publication date: September 12, 2002Inventors: Abu Amanullah, Antoine J. Rouphael