Patents by Inventor Kai Roland Kriedte
Kai Roland Kriedte 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: 8615033Abstract: A method for controlling a transmission rate of at least one transceiver, the transceiver including a transmitter and a receiver, includes: determining a signal quality characteristic corresponding to a signal received at the receiver by measuring a difference between one or more reference constellation points and one or more received constellation points, and modifying a transmission rate of the transmitter over a wireless communication channel as a function of the signal quality characteristic.Type: GrantFiled: December 30, 2008Date of Patent: December 24, 2013Assignee: Agere Systems LLCInventors: Jan Boer, Bas Driesen, Ra'anan Gil, Kai Roland Kriedte
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Patent number: 8503577Abstract: In a wireless system including a wireless communication channel, a method for estimating a signal quality of a received signal includes the steps of receiving a signal from the wireless communication channel, the received signal including at least one field that is modulated and encoded in a substantially fixed manner, and generating at least one reference field based, at least in part, on the at least one field and on a channel estimation signal. The channel estimation signal is representative of at least one characteristic of the wireless communication channel. The method further includes the step of generating a signal quality estimate as a function of the at least one field in the received signal and the generated at least one reference field.Type: GrantFiled: July 17, 2003Date of Patent: August 6, 2013Assignee: Agere Systems LLCInventors: Jan Boer, Bas Driesen, Ra'anan Gil, Kai Roland Kriedte
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Patent number: 8085806Abstract: A method and apparatus are disclosed for detecting a collision in a carrier sense multiple access wireless communication system. Each transmitting station includes a collision detector that evaluates one or more predefined criteria to determine when a collision has occurred. The collision detector evaluates the measured energy level and optionally payload and/or preamble detection information to determine if a collision has occurred. A collision occurred when an expected ACK message is not received, in the presence of an increased energy level and possibly preamble or payload detection information. The collision detector of the present invention can be activated, for example, at a time corresponding to the start of the 802.11 Short Inter Frame Space interval.Type: GrantFiled: September 26, 2003Date of Patent: December 27, 2011Assignee: Agere Systems Inc.Inventors: Jan Boer, Wilhelmus Diepstraten, Robert John Kopmeiners, Kai Roland Kriedte
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Publication number: 20090129451Abstract: A method for controlling a data transmission rate of at least one transceiver in a wireless system, the transceiver including a transmitter and a receiver, the method including the steps of: determining a signal quality characteristic corresponding to a signal received at the receiver by measuring a difference between one or more reference constellation points and one or more received constellation points, the signal quality characteristic representing an estimation of signal degradation through the wireless communication channel; and modifying a data transmission rate of the transmitter as a function of the signal quality characteristic.Type: ApplicationFiled: December 30, 2008Publication date: May 21, 2009Applicant: Agere Systems Inc.Inventors: Jan Boer, Bas Driesen, Ra'anan Gil, Kai Roland Kriedte
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Patent number: 7499486Abstract: In a wireless system comprising at least one transceiver configurable for communication over a wireless communication channel, the transceiver comprising a transmitter and a receiver, a method for controlling a data transmission rate of the at least one transceiver comprises the steps of: (i) determining a signal quality characteristic corresponding to a signal received at the receiver by measuring a difference between one or more reference constellation points and one or more received constellation points, the signal quality characteristic representing an estimation of signal degradation; and (ii) modifying a data transmission rate of the transmitter based, at least in part, on the signal quality characteristic.Type: GrantFiled: November 27, 2002Date of Patent: March 3, 2009Assignee: Agere Systems Inc.Inventors: Jan Boer, Bas Driesen, Ra'anan Gil, Kai Roland Kriedte
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Patent number: 7463589Abstract: Medium access control device (301) for a mobile network station (3, 4, 5) or an access point (AP1) in a wireless local area network (1), having controlling means (302), processing means (303) and transmitting and receiving means (304); the controlling means (302) being arranged to control transmission and reception of radio frequency data signals containing data symbols; the transmitting and receiving means (304) being arranged for transmission and reception of electromagnetic data signals; the processing means (303) being arranged for detecting a first signal portion and a second signal portion in the received data signal, the second signal portion following the first signal portion and having a signal coding differing from a signal coding of the first signal portion.Type: GrantFiled: July 31, 2001Date of Patent: December 9, 2008Assignee: Agere Systems Inc.Inventors: Wilhelmus Diepstraten, Adriaan Kamerman, Kai Roland Kriedte, D. J. Richard Van Nee
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Patent number: 7254196Abstract: Symbol timing for a wireless communication system, such as a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) wireless LAN system, is determined by summing the powers for an appropriate set of channel impulse responses, integrating this power summation over an appropriate window (e.g., equivalent to the guard interval), and identifying the time at which the maximum integration occurs. Depending on the implementation, symbol timing can be determined for each receiver branch individually or for all receiver branches jointly. In either case, the determined symbol timing(s) can minimize the amount of inter-symbol and inter-channel interferences that are invoked in the system.Type: GrantFiled: August 20, 2003Date of Patent: August 7, 2007Assignee: Agere Systems Inc.Inventors: Kai Roland Kriedte, Tim Schenk, Allert van Zelst
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Patent number: 6967994Abstract: A system for operating a communication system comprising one or more transmitters and receivers. The transmitted signals are provided with a preamble for training the receiver and/or the transmitter being in communication. The quality of the received signal is measured and compared with a threshold. If the quality is higher or lower than said threshold, a short preamble processing or a long preamble processing, respectively, is used. More than one threshold and associated pairs of preambles having different length may be used.Type: GrantFiled: September 7, 2001Date of Patent: November 22, 2005Assignee: Agere Systems Inc.Inventors: Jan Boer, Henk Van Bokhorst, Robert John Kopmeiners, Kai Roland Kriedte, Rienk Mud
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Publication number: 20040101035Abstract: In a wireless system comprising at least one transceiver configurable for communication over a wireless communication channel, the transceiver comprising a transmitter and a receiver, a method for controlling a data transmission rate of the at least one transceiver comprises the steps of: (i) determining a signal quality characteristic corresponding to a signal received at the receiver by measuring a difference between one or more reference constellation points and one or more received constellation points, the signal quality characteristic representing an estimation of signal degradation; and (ii) modifying a data transmission rate of the transmitter based, at least in part, on the signal quality characteristic.Type: ApplicationFiled: November 27, 2002Publication date: May 27, 2004Inventors: Jan Boer, Bas Driesen, Ra?apos;anan Gil, Kai Roland Kriedte
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Publication number: 20040100939Abstract: Symbol timing for a wireless communication system, such as a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) wireless LAN system, is determined by summing the powers for an appropriate set of channel impulse responses, integrating this power summation over an appropriate window (e.g., equivalent to the guard interval), and identifying the time at which the maximum integration occurs. Depending on the implementation, symbol timing can be determined for each receiver branch individually or for all receiver branches jointly. In either case, the determined symbol timing(s) can minimize the amount of inter-symbol and inter-channel interferences that are invoked in the system.Type: ApplicationFiled: August 20, 2003Publication date: May 27, 2004Inventors: Kai Roland Kriedte, Tim Schenk, Allert van Zelst
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Publication number: 20030026198Abstract: Medium access control device (301) for a mobile network station (3, 4, 5) or an access point (AP1) in a wireless local area network (1), having controlling means (302), processing means (303) and transmitting and receiving means (304); the controlling means (302) being arranged to control transmission and reception of radio frequency data signals containing data symbols; the transmitting and receiving means (304) being arranged for transmission and reception of electromagnetic data signals; the processing means (303) being arranged for detecting a first signal portion and a second signal portion in the received data signal, the second signal portion following the first signal portion and having a signal coding differing from a signal coding of the first signal portion.Type: ApplicationFiled: July 31, 2001Publication date: February 6, 2003Inventors: Wilhelmus Diepstraten, Adriaan Kamerman, Kai Roland Kriedte, D.J. Richard Van Nee
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Publication number: 20020048317Abstract: A system for operating a communication system comprising one or more transmitters and receivers. The transmitted signals are provided with a preamble for training the receiver and/or the transmitter being in communication. The quality of the received signal is measured and compared with a threshold. If the quality is higher or lower than said threshold, a short preamble processing or a long preamble processing, respectively, is used. More than one threshold and associated pairs of preambles having different length may be used.Type: ApplicationFiled: September 7, 2001Publication date: April 25, 2002Inventors: Jan Boer, Henk Van Bokhorst, Robert John Kopmeiners, Kai Roland Kriedte, Rienk Mud