Patents by Inventor Christoph Arnold Joetten
Christoph Arnold Joetten 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: 9780921Abstract: A receiver receives packets without prior knowledge of their bandwidths. The receiver calculates a first auto-correlation function for a first channel, a second auto-correlation function for a second channel, and a dot product of the first auto-correlation function and the second auto-correlation function. A packet is detected and its bandwidth classified based at least in part on the dot product.Type: GrantFiled: July 11, 2014Date of Patent: October 3, 2017Assignee: QUALLCOMM IncorporatedInventors: Peter Zillmann, Christoph Arnold Joetten, Christian Pietsch, Nicola Varanese
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Publication number: 20160014005Abstract: A receiver receives packets without prior knowledge of their bandwidths. The receiver calculates a first auto-correlation function for a first channel, a second auto-correlation function for a second channel, and a dot product of the first auto-correlation function and the second auto-correlation function. A packet is detected and its bandwidth classified based at least in part on the dot product.Type: ApplicationFiled: July 11, 2014Publication date: January 14, 2016Inventors: Peter Zillmann, Christoph Arnold Joetten, Christian Pietsch, Nicola Varanese
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Patent number: 9172574Abstract: To reduce the peak-to-average power ratio (PAPR) of a complex-valued digital baseband signal, the signal is mixed to an intermediate frequency and its real components extracted, to generate an intermediate-frequency real-valued digital signal. The intermediate frequency is one-quarter of a sampling rate of the complex-valued digital baseband signal. The intermediate-frequency real-valued digital signal is clipped and down-converted by one-quarter of the sampling rate.Type: GrantFiled: July 11, 2014Date of Patent: October 27, 2015Assignee: QUALCOMM IncorporatedInventors: Peter Zillmann, Christoph Arnold Joetten, Christian Pietsch
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Patent number: 8982987Abstract: Successive pairs of OFDM symbols are transmitted by an OFDM transmitter and received by an OFDM receiver. The successive pairs include a first pair of OFDM symbols. First and second OFDM symbols of the first pair both include pilot symbols on two subcarriers that are symmetric about a center carrier frequency. The two subcarriers are the same for the first and second OFDM symbols. The pilot symbols on the two subcarriers for the first and second OFDM symbols compose an orthogonal matrix. The OFDM receiver estimates frequency responses at frequencies including the frequencies of the two subcarriers and compensates for signal impairment based at least in part on the estimated frequency responses.Type: GrantFiled: March 29, 2013Date of Patent: March 17, 2015Assignee: QUALCOMM IncorporatedInventors: Nicola Varanese, Christian Pietsch, Juan Montojo, Christoph Arnold Joetten
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Publication number: 20140255029Abstract: A coax network unit (CNU) receives downstream bursts from a coax line terminal (CLT) and transmits upstream bursts to the CLT. The downstream bursts include start markers that indicate the beginnings of the downstream bursts and may also include pilot symbols. The downstream bursts are continuous across available resource elements in a matrix of subcarriers and orthogonal frequency-division multiplexing (OFDM) symbols. The available resource elements exclude resource elements in the matrix that carry the pilot symbols. The upstream bursts may include start markers indicating the beginnings of the upstream bursts and end markers indicating the ends of the upstream bursts. Respective upstream bursts are transmitted in respective groups of one or more resource blocks allocated to the CNU.Type: ApplicationFiled: November 19, 2013Publication date: September 11, 2014Applicant: QUALCOMM IncorporatedInventors: Nicola Varanese, Hendrik Schoeneich, Christian Pietsch, Christoph Arnold Joetten, Andrea Garavaglia, Stefan Brueck, Juan Montojo
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Publication number: 20140198865Abstract: A coax network unit (CNU) receives a first plurality of orthogonal frequency-division multiplexing (OFDM) symbols from a coax line terminal (CLT). The first plurality of OFDM symbols includes continual pilot symbols on one or more subcarriers. The CNU also receives a grant from the CLT allocating a set of subcarriers within a second plurality of OFDM symbols to the CNU. The CNU transmits upstream to the CLT using the allocated set of subcarriers within the second plurality of OFDM symbols. When transmitting, the CNU places non-continual pilot symbols on regularly spaced subcarriers of the allocated set of subcarriers and does not place continual pilot symbols within the allocated set of subcarriers.Type: ApplicationFiled: August 15, 2013Publication date: July 17, 2014Applicant: QUALCOMM IncorporatedInventors: Christian Pietsch, Juan Montojo, Nicola Varanese, Stefan Brueck, Hendrik Schoeneich, Christoph Arnold Joetten
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Publication number: 20130259153Abstract: Successive pairs of OFDM symbols are transmitted by an OFDM transmitter and received by an OFDM receiver. The successive pairs include a first pair of OFDM symbols. First and second OFDM symbols of the first pair both include pilot symbols on two subcarriers that are symmetric about a center carrier frequency. The two subcarriers are the same for the first and second OFDM symbols. The pilot symbols on the two subcarriers for the first and second OFDM symbols compose an orthogonal matrix. The OFDM receiver estimates frequency responses at frequencies including the frequencies of the two subcarriers and compensates for signal impairment based at least in part on the estimated frequency responses.Type: ApplicationFiled: March 29, 2013Publication date: October 3, 2013Applicant: QUALCOMM IncorporatedInventors: Nicola Varanese, Christian Pietsch, Juan Montojo, Christoph Arnold Joetten
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Patent number: 8391389Abstract: Techniques for receiving a MIMO transmission are described. A receiver processes received data for the MIMO transmission based on a front-end filter to obtain filtered data. The receiver further processes the filtered data based on at least one first combiner matrix to obtain detected data for a first frame. The receiver demodulates and decodes this detected data to obtain decoded data for the first frame. The receiver then processes the filtered data based on at least one second combiner matrix and the decoded data for the first frame to cancel interference due to the first frame and obtain detected data for a second frame. The receiver processes this detected data to obtain decoded data for the second frame. The front-end filter processes non on-time signal components in the received data. Each combiner matrix combines on-time signal components in the filtered data to obtain detected data for a channelization code.Type: GrantFiled: November 5, 2007Date of Patent: March 5, 2013Assignee: QUALCOMM IncorporatedInventors: Ivan Jesus Fernandez-Corbaton, Josef J. Blanz, Christoph Arnold Joetten
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Patent number: 8107549Abstract: Techniques for receiving a MIMO transmission are described. A receiver processes received data from multiple receive antennas in multiple stages. A first stage performs front-end filtering/equalization on the received data with a front-end filter to process non on-time signal components in the multiple received signals. A second stage processes the filtered data with one or more combiner matrices to combine on-time signal components for multiple transmitted signals. For a MIMO-CDM transmission, a single front-end filter may be used for all channelization codes, and a different combiner matrix may be used for each channelization code. Partitioning the receiver processing into multiple stages simplifies derivation of the front-end filter and combiner matrices while achieving good performance. The front-end filter and combiner matrices may be updated separately at the same or different rates.Type: GrantFiled: November 28, 2006Date of Patent: January 31, 2012Assignee: QUALCOMM, IncorporatedInventors: Christoph Arnold Joetten, George Jongren, Ivan Jesus Fernandez-Corbaton
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Patent number: 7496147Abstract: A method is provided for transmitting information in a radio communication system provided with at least one transmitting station (AP) and at least two receiver stations (MT). The transmitting station (AP) and the receiver stations (MT) are connected together via a radio communication interface. The transmitting stations (AP) includes a transmitting antenna with K<SB>B</SB>31 antenna elements, whereby K<SB>B</SB>?1, and the receiving stations (MT) respectively include a transmitting antenna with K<SB>M</SB> antenna elements, whereby K<SB>M</SB>?1, and which communicate via a MIMO-transmission. The transmitting signals transmitted from the antenna elements of the transmitting antenna of the transmitting station (AP) are produced in a common process and are adapted in relation to the transmitting energy to be used during radiation.Type: GrantFiled: May 27, 2003Date of Patent: February 24, 2009Assignee: Nokia Siemens Networks GmbH & Co KGInventors: Paul-Walter Baier, Christoph Arnold Jötten, Michael Meurer, Wei Qiu, Hendrik Tröger
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Publication number: 20080219374Abstract: Techniques for receiving a MIMO transmission are described. A receiver processes received data for the MIMO transmission based on a front-end filter to obtain filtered data. The receiver further processes the filtered data based on at least one first combiner matrix to obtain detected data for a first frame. The receiver demodulates and decodes this detected data to obtain decoded data for the first frame. The receiver then processes the filtered data based on at least one second combiner matrix and the decoded data for the first frame to cancel interference due to the first frame and obtain detected data for a second frame. The receiver processes this detected data to obtain decoded data for the second frame. The front-end filter processes non on-time signal components in the received data. Each combiner matrix combines on-time signal components in the filtered data to obtain detected data for a channelization code.Type: ApplicationFiled: November 5, 2007Publication date: September 11, 2008Applicant: QUALCOMM INCORPORATEDInventors: Ivan Jesus Fernandez-Corbaton, Josef J. Blanz, Christoph Arnold Joetten