Patents by Inventor Olli Juhani Piirainen
Olli Juhani Piirainen 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: 11438044Abstract: Solutions to determine how to form beams when co-operating multiple-input multiple-output antenna panels are used are disclosed. Beams are formed according to sets of beamforming weights corresponding to minimized total transmit power from an antenna array of interest to served terminal devices. Optimization to minimize total transmit power subject to a predefined constraint on a minimum allowable expected value of signal-to-interference-plus-noise ratio, SINR, is performed. In the optimization expected values of SINR for a terminal device are calculated based on based on the sets of beamforming weights for at least the served terminal devices, and weighted second order statistics, wherein a weighting factor for second order statistics between the served terminal devices and the antenna array is one and weighting factors for the other second order statistics less than one. The second order statistics are included in maintained channel state information.Type: GrantFiled: March 15, 2022Date of Patent: September 6, 2022Assignee: Nokia Solutions and Networks OyInventors: Olli Juhani Piirainen, Jari Vilho Ylioinas
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Publication number: 20220181791Abstract: This specification relates to systems and methods for determining eigenvalues and eigenvectors of a covariance matrix, for example for use in eigen-beamforming in MIMO systems. According to a first aspect of this specification, there is describes a method comprising: receiving an input covariance matrix; and determining one or more eigenvalues and/or eigenvectors of the matrix iteratively using gradient ascent, wherein each iteration of the gradient ascent has a step size, ?, that maximises a Rayleigh quotient along the gradient.Type: ApplicationFiled: December 3, 2021Publication date: June 9, 2022Inventors: Sivarama VENKATESAN, Jaakko Eino Ilmari VIHRIÄLÄ, Olli Juhani PIIRAINEN, Markus MYLLYLÄ
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Patent number: 10594533Abstract: A method and apparatus are disclosed for determining a signal subspace in a communications system. A remote apparatus obtains signal streams from antenna elements or signal streams from antenna beams. Based on the obtained signal streams, the apparatus selects a signal subspace for a user, the signal subspace having a dimension M. Based on the selected signal subspace, the apparatus transmits, via an interface to a central apparatus, M streams of post-fast-Fourier-transform data, the interface being capable of transmitting a different subspace for different frequency bins.Type: GrantFiled: February 26, 2019Date of Patent: March 17, 2020Assignee: Nokia Solutions and Networks OyInventors: Olli Juhani Piirainen, Shirish Nagaraj
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Publication number: 20190190756Abstract: A method and apparatus are disclosed for determining a signal subspace in a communications system. A remote apparatus obtains signal streams from antenna elements or signal streams from antenna beams. Based on the obtained signal streams, the apparatus selects a signal subspace for a user, the signal subspace having a dimension M. Based on the selected signal subspace, the apparatus transmits, via an interface to a central apparatus, M streams of post-fast-Fourier-transform data, the interface being capable of transmitting a different subspace for different frequency bins.Type: ApplicationFiled: February 26, 2019Publication date: June 20, 2019Inventors: Olli Juhani PIIRAINEN, Shirish NAGARAJ
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Patent number: 10050652Abstract: An apparatus and a method are provided. The solution includes controlling the reception of a signal; dividing the received signal into a predetermined number of signal streams including the same information; applying a linear process to each signal stream, the processes having different frequency characteristics for each stream; applying a shared interference rejection over the signal streams.Type: GrantFiled: April 11, 2014Date of Patent: August 14, 2018Assignee: Provenance Asset Group LLCInventors: Sathiaseelan Sundaralingam, Olli Juhani Piirainen
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Patent number: 9979413Abstract: There is provided a method for uplink data compression, the method including transforming a signal from a time-domain presentation into a frequency-domain presentation, selecting a group of adjacent frequency bins from the frequency-domain presentation, generating a floating point number representation from values of the group of adjacent frequency bins, wherein the floating point number representation includes a mantissa for each of the frequency bins' values of the group of adjacent frequency bins, and wherein the floating point number representation further includes a common exponent shared between the mantissas, and outputting the mantissas of the floating point number representation, and the value of the common exponent shared between the mantissas of the floating point number representation.Type: GrantFiled: September 25, 2014Date of Patent: May 22, 2018Assignee: Nokia Solutions and Networks OyInventor: Olli Juhani Piirainen
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Publication number: 20170250704Abstract: There is provided a method for uplink data compression, the method including transforming a signal from a time-domain presentation into a frequency-domain presentation, selecting a group of adjacent frequency bins from the frequency-domain presentation, generating a floating point number representation from values of the group of adjacent frequency bins, wherein the floating point number representation includes a mantissa for each of the frequency bins' values of the group of adjacent frequency bins, and wherein the floating point number representation further includes a common exponent shared between the mantissas, and outputting the mantissas of the floating point number representation, and the value of the common exponent shared between the mantissas of the floating point number representation.Type: ApplicationFiled: September 25, 2014Publication date: August 31, 2017Inventor: Olli Juhani PIIRAINEN
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Publication number: 20170170998Abstract: Interference may affect numerous communication systems. Thus, certain wireless communication systems that rely on combining transmitted repetitions of information may benefit from interference removal techniques, such as those that provide pre-combiner interference removal. A method can include receiving, from a transmitter, multiple repetitions of a same information sent from the transmitter over a channel. The method can also include removing interference from the respective repetitions. The method can further include combining the interference-removed repetitions. The method can additionally include performing channel estimation based on the combined interference-removed repetitions. The method can also include retrieving information corresponding to the same information sent in the multiple repetitions based on the channel estimation and combined interference-removed repetitions.Type: ApplicationFiled: March 31, 2016Publication date: June 15, 2017Inventors: Sathiaseelan SUNDARALINGAM, Srinivasan SELVAGANAPATHY, Muneender CHIRANJI, Olli Juhani PIIRAINEN
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Patent number: 9647822Abstract: A method and a device for processing data blocks are provided, wherein each resource unit includes at least two portions of user data, wherein each portion of user data is associated with a user; and wherein subsequent resource units include different combinations of portions of user data. Furthermore, a communication system is provided comprising such a device.Type: GrantFiled: February 5, 2009Date of Patent: May 9, 2017Assignee: Nokia Solutions and Networks OyInventors: Kari Juhani Niemela, Olli Juhani Piirainen
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Publication number: 20170041033Abstract: An apparatus and a method are provided. The solution includes controlling the reception of a signal; dividing the received signal into a predetermined number of signal streams including the same information; applying a linear process to each signal stream, the processes having different frequency characteristics for each stream; applying a shared interference rejection over the signal streams.Type: ApplicationFiled: April 11, 2014Publication date: February 9, 2017Inventors: Sathiaseelan Sundaralingam, Olli Juhani PIIRAINEN
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Patent number: 9319865Abstract: An apparatus and a method are provided. The provided solution includes an apparatus including a transceiver to be in wireless connection with one or more sets of user equipment and a controller configured to connect to the Internet, set up a virtual point-to-point connection to a second apparatus, set up and provide end-to-end call services using the virtual point-to-point connection between user equipment which are connected to and served by the apparatuses.Type: GrantFiled: July 14, 2009Date of Patent: April 19, 2016Assignee: Nokia Solutions and Networks OyInventors: Vinh Van Phan, Ling Yu, Olli Juhani Piirainen, Markku Juha Vainikka, Matti Tapani Kiiski, Seppo Ilmari Vesterinen
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Patent number: 8954078Abstract: A method, apparatus, and computer program for continuing transmission during handover are presented. A communication connection is established between a source base station and a mobile relay base station comprising a distributed antenna system (DAS). The DAS includes multiple spatially distributed antenna units (DAUs), wherein at least part of the DAUs are used for forming a cluster of sub-cells within a coverage area of the mobile relay base station and at least part of the DAUs are used for communicating with a fixed cellular network infrastructure over multiple backhaul links. A first backhaul link is then handed over from the source base station to a target base station. After the handover, data transfer between the source base station and at least one backhaul link still linked to the source base station is continued, and remaining backhaul link(s) are released from the source base station according to a determined criterion.Type: GrantFiled: December 2, 2009Date of Patent: February 10, 2015Assignee: Nokia Siemens Networks OyInventors: Vinh Van Phan, Ling Yu, Kari Veikko Horneman, Jaakko Eino Ilmari Vihriala, Matti Tapani Kiiski, Olli Juhani Piirainen, Markku Juha Vainikka
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Patent number: 8798654Abstract: It is provided a method, including deciding, based on a previously estimated interference value, whether a user equipment or a sounding reference signal or a channel of a received uplink signal is affected by a colored interference more than a first predefined threshold, wherein colored interference is an interference having a spatial and/or spectral predominance; and suppressing interference rejection combining on the uplink signal if none of the user equipment, the sounding reference signal, and the channel of the received uplink signal is affected more than the first predefined threshold.Type: GrantFiled: April 22, 2009Date of Patent: August 5, 2014Assignee: Nokia Siemens Networks OyInventors: Sabine Rössel, Esa Tapani Tiirola, Olli Juhani Piirainen, Ji Jun Luo, Ingo Viering, Mikko Kalevi Taskinen, Timothy Paul, Josef Forster, Markku Juha Vainikka, Carsten Ritterhoff
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Publication number: 20130322581Abstract: The invention relates to apparatuses, methods, a system, computer programs, computer program products and computer-readable media. Matched-filtered samples are conveyed instead of antenna samples, so that data rates in the interface between a remote radio head and the BTS or base band hotel may be lower. For detecting data, the matched filtered data samples are processed by using information on the radio channel.Type: ApplicationFiled: January 18, 2011Publication date: December 5, 2013Applicant: Nokia Siemens Networks OYInventors: Olli Juhani Piirainen, Markku Juha Vainikka
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Patent number: 8583182Abstract: A method, an apparatus and a computer program product for configuring remote antenna units with communication properties in a radio access communication system employing a distributed antenna system (DAS) are provided. The method including configuring each of the one or more remote antenna units with remote-antenna-unit-specific communication properties dynamically during communication.Type: GrantFiled: April 21, 2009Date of Patent: November 12, 2013Assignee: Nokia Siemens Networks OyInventors: Olli Juhani Piirainen, Markku Juha Vainikka, Vinh Van Phan
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Publication number: 20120315916Abstract: A method, apparatus, and computer program for continuing transmission during handover are presented. A communication connection is established between a source base station and a mobile relay base station comprising a distributed antenna system (DAS). The DAS includes multiple spatially distributed antenna units (DAUs), wherein at least part of the DAUs are used for forming a cluster of sub-cells within a coverage area of the mobile relay base station and at least part of the DAUs are used for communicating with a fixed cellular network infrastructure over multiple backhaul links. A first backhaul link is then handed over from the source base station to a target base station. After the handover, data transfer between the source base station and at least one backhaul link still linked to the source base station is continued, and remaining backhaul link(s) are released from the source base station according to a determined criterion.Type: ApplicationFiled: December 2, 2009Publication date: December 13, 2012Inventors: Vinh Van Phan, Ling Yu, Kari Veikko Horneman, Jaakko Eino Ilmari Vihriala, Matti Tapani Kiiski, Olli Juhani Piirainen, Markku Juha Vainikka
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Publication number: 20120164980Abstract: An apparatus and a method are provided. The provided solution includes an apparatus including a transceiver to be in wireless connection with one or more sets of user equipment and a controller configured to connect to the Internet, set up a virtual point-to-point connection to a second apparatus, set up and provide end-to-end call services using the virtual point-to-point connection between user equipment which are connected to and served by the apparatuses.Type: ApplicationFiled: July 14, 2009Publication date: June 28, 2012Inventors: Vinh Van Phan, Ling Yu, Olli Juhani Piirainen, Markku Juha Vainikka, Matti Tapani Kiiski, Seppo Ilmari Vesterinen
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Publication number: 20110105184Abstract: A method, an apparatus and a computer program product for configuring remote antenna units with communication properties in a radio access communication system employing a distributed antenna system (DAS) are provided. The method including configuring each of the one or more remote antenna units with remote-antenna-unit-specific communication properties dynamically during communication.Type: ApplicationFiled: April 21, 2009Publication date: May 5, 2011Inventors: Olli Juhani Piirainen, Markku Juha Vainikka, Vinh Van Phan
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Publication number: 20110051631Abstract: A method and a device for processing data blocks are provided, wherein each resource unit includes at least two portions of user data, wherein each portion of user data is associated with a user; and wherein subsequent resource units include different combinations of portions of user data. Furthermore, a communication system is provided comprising such a device.Type: ApplicationFiled: February 5, 2009Publication date: March 3, 2011Inventors: Kari Juhani Niemela, Olli Juhani Piirainen
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Patent number: 6553079Abstract: The modulator has an input (30) which receives data to be modulated. A plurality of memory regions acting as look-up tables (38-44) are arranged to contain information relating to the modulation method to be carried out by the modulator. At least one of the memory regions provides time independent modulation values and at least one of the memory regions provides time dependent modulation values. Values provided by the memory region is dependent on the data received via the input. Processing means provide a modulating signal based on the values provided by the memory regions.Type: GrantFiled: February 22, 2000Date of Patent: April 22, 2003Assignee: Nokia CorporationInventor: Olli Juhani Piirainen