Patents by Inventor Risto Wichman
Risto Wichman 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: 10237775Abstract: Disclosed is a method for presenting geographical radio resource usage information in a user interface. The method includes receiving radio resource reservation data including location, time and frequency information stored in an administrative spectrum management system. Furthermore, the method includes selecting at least one area of interest and receiving an input indicating a time period of interest from a user. Moreover, the method includes dividing the at least one area of interest into a plurality of subareas. The method includes calculating for each subarea of the plurality of subareas within the at least one area of interest, a first utilization rate of radio resource over the time period of interest. Furthermore, the method includes defining a color for each subarea based on the calculated first utilization rate. Moreover, the method includes rendering the plurality of subareas with the defined color as a geographical map on the user interface.Type: GrantFiled: November 17, 2017Date of Patent: March 19, 2019Assignee: FAIRSPECTRUM OYInventors: Heikki Kokkinen, Jaakko Ojaniemi, Arto Kivinen, Risto Wichman
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Patent number: 9350573Abstract: An apparatus, method and system for reducing discontinuities between waveforms in a communication system. In one embodiment, an apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured, with the processor, to determine an amplitude and set of derivatives at an end point of a first symbol waveform, and determine an amplitude and set of derivatives at a beginning point of a second symbol waveform. The memory and the computer program code are configured, with the processor, to insert a guard period waveform having an amplitude and set of derivatives at a first end to substantially match the amplitude and set of derivatives at the end point of the first symbol waveform and an amplitude and set of derivatives at a second end that substantially matches the amplitude and set of derivatives at the beginning point of the second symbol waveform.Type: GrantFiled: December 23, 2010Date of Patent: May 24, 2016Assignee: NOKIA TECHNOLOGIES OYInventors: Markus Nentwig, Risto Wichman
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Patent number: 9106392Abstract: Transmission antenna diversity can be set up on a data transmission connection between a transmitting unit, wherein there are several transmission antenna routes, and a receiving unit. A broadcast signal is transmitted through all transmission antenna routes of the transmitting unit, with the aid of these signals a choice is made in the receiving unit of the optimum transmission antenna route and a message of the choice is transmitted to the transmitting unit, which transmits user data through the transmission antenna route connected for use. The broadcast signal of each transmission antenna route can be shaped by an individual signal shaping method which is different from the others and a transmission antenna route is connected for use based on the received antenna choice message, individually for each receiving unit.Type: GrantFiled: November 29, 2006Date of Patent: August 11, 2015Assignee: NOKIA TECHNOLOGIES OYInventors: Ari Hottinen, Risto Wichman
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Publication number: 20120166119Abstract: An apparatus, method and system for reducing discontinuities between waveforms in a communication system. In one embodiment, an apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured, with the processor, to determine an amplitude and set of derivatives at an end point of a first symbol waveform, and determine an amplitude and set of derivatives at a beginning point of a second symbol waveform. The memory and the computer program code are configured, with the processor, to insert a guard period waveform having an amplitude and set of derivatives at a first end to substantially match the amplitude and set of derivatives at the end point of the first symbol waveform and an amplitude and set of derivatives at a second end that substantially matches the amplitude and set of derivatives at the beginning point of the second symbol waveform.Type: ApplicationFiled: December 23, 2010Publication date: June 28, 2012Inventors: Markus Nentwig, Risto Wichman
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Publication number: 20100009706Abstract: The invention relates to a method for controlling the weighting of a data signal in the at least two antenna elements of a first radio connection unit of a radio communications system, which data signal is to be distributed for parallel transmission to a second radio connection unit to at least two beams. In order to improved such a method, it comprises: determining in the second radio connection unit a weight information enabling the first radio connection unit to determine the sets of weights for suitable beams for transmission and transmitting it to the first radio connection unit; and distributing the data signal in the first radio connection unit to those sets of weights and transmitting the data signals simultaneously via the formed beams. Alternatively or additionally, the second unit determines the number of beams to be used and informs the first unit about it. The invention equally relates to corresponding radio connection units, radio connection unit modules and radio communications systems.Type: ApplicationFiled: April 21, 2008Publication date: January 14, 2010Inventors: Ari Hottinen, Risto Wichman, Olav Tirkkonen
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Patent number: 7643799Abstract: Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is disclosed. In a receiving station received transmission signals are processed and a feedback signal to be transmitted to a transmitting device is generated on the basis of the processed signals. Then, transmit weights to be applied to transmission signals are determined in accordance with the feedback signal.Type: GrantFiled: March 6, 2006Date of Patent: January 5, 2010Assignee: Nokia CorporationInventors: Jyri Hamalainen, Risto Wichman
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Publication number: 20090279529Abstract: A solution to overcome synchronization problems related to a scenario where multiple radio access networks utilize a shared frequency band in a radio communication environment is provided. The radio access networks are synchronized to a common synchronization source which may be a synchronization signal broadcasted by another radio system. The synchronization source is selected from a predetermined set of synchronization signals according to the availability of the synchronization signals for transmitters of the radio access networks.Type: ApplicationFiled: January 27, 2009Publication date: November 12, 2009Inventors: Jyri Hamalainen, Risto Wichman, Vinh Van Phan, Antti Sorri, Kari Horneman
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Patent number: 7599666Abstract: Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is disclosed. In a receiving station received transmission signals are processed and a feedback signal to be transmitted to a transmitting device is generated on the basis of the processed signals. Then, transmit weights to be applied to transmission signals are determined in accordance with the feedback signal.Type: GrantFiled: March 6, 2006Date of Patent: October 6, 2009Assignee: Nokia CorporationInventors: Jyri Hamalainen, Risto Wichman
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Patent number: 7596167Abstract: The invention is related to a network element, comprising: means for receiving feedback information from the user device; means for creating a first orthogonality measure by using the feedback information; means for creating a second orthogonality measure by comparing transmission resources; means for transmitting information to at least one user device.Type: GrantFiled: January 4, 2006Date of Patent: September 29, 2009Assignee: Nokia CorporationInventors: Jyri Hämäläinen, Esa Tiirola, Risto Wichman
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Patent number: 7310537Abstract: The present invention relates to a method and a communication system wherein stations communicate on a wireless interface. The method includes the steps of including beam identity information into signals transmitted on multiple beams provided by a first station, receiving at a second station signals transmitted from the first station, and identifying beams via which the second station received signals from the first station based on said identity information. At least one beam for transmission on the wireless interface between the stations is then selected. A station configured for the communication comprises antenna means for receiving signals transmitted from the other station on multiple beams and a controller for identifying beams based on beam identity information associated with signals received from the other station.Type: GrantFiled: August 13, 2003Date of Patent: December 18, 2007Assignee: Nokia CorporationInventors: Risto Wichman, Olav Tirkkonen, Rinat Kashaev
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Patent number: 7257424Abstract: The invention relates to a radio system and a transceiver method. The method comprises the steps of transmitting a signal of at least one type by a transceiver of the first type; receiving a signal by a transceiver of the second type with at least two differently polarized antennas; performing measurements of the received signal to determine its polarization by using the transceiver of the second type; determining the polarization of the transceiver of the first type; adjusting the signal transmitted by the transceiver of the second type in such a way that the polarization of the signal is matched with the polarization used by the transceiver of the first type; transmitting at least two orthogonally polarized, polarization-matched signals by the transceiver of the second type; and receiving the polarization-matched signals by the transceiver of the first type by using at least two antennas of different polarizations.Type: GrantFiled: December 13, 2002Date of Patent: August 14, 2007Assignee: Nokia CorporationInventors: Jyri Hämäläinen, Kari Niemelä, Risto Wichman
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Publication number: 20070184853Abstract: The invention relates to a method for controlling the weighting of a data signal in the at least two antenna elements of a first radio connection unit of a radio communications system, which data signal is to be distributed for parallel transmission to a second radio connection unit to at least two beams. In order to improved such a method, it comprises: determining in the second radio connection unit a weight information enabling the first radio connection unit to determine the sets of weights for suitable beams for transmission and transmitting it to the first radio connection unit; and distributing the data signal in the first radio connection unit to those sets of weights and transmitting the data signals simultaneously via the formed beams. Alternatively or additionally, the second unit determines the number of beams to be used and informs the first unit about it. The invention equally relates to corresponding radio connection units, radio connection unit modules and radio communications systems.Type: ApplicationFiled: March 20, 2007Publication date: August 9, 2007Inventors: Ari Hottinen, Risto Wichman, Olav Tirkkonen
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Patent number: 7236537Abstract: The invention relates to a method and a radio system for transmitting a digital signal. The method comprises the following steps: the transmitter transmits at least a part of the signal via at least two different transmit antenna paths; the transmitter weights the transmit power of the signals to be transmitted via the different transmit antenna paths with respect to one another by means of changeable weighting coefficients determined for each transmit antenna path; the receiver receives the signal.Type: GrantFiled: June 13, 2001Date of Patent: June 26, 2007Assignee: Nokia CorporationInventors: Ari Hottinen, Risto Wichman
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Patent number: 7224943Abstract: Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is disclosed. In a receiving station received transmission signals are processed and a feedback signal to be transmitted to a transmitting device is generated on the basis of the processed signals. Then, transmit weights to be applied to transmission signals are determined in accordance with the feedback signal.Type: GrantFiled: May 21, 2001Date of Patent: May 29, 2007Assignee: Nokia CorporationInventors: Jyri Hämäläinen, Risto Wichman
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Publication number: 20070072570Abstract: In mobile communications systems transmission antenna diversity is used e.g. to compensate for fading caused to the signal on the radio path. It is known to make the choice of transmission antenna jointly for all subscriber connections, but it is not hereby possible to offer the optimum transmission antenna to simultaneous connections. The present invention aims at a method for implementing transmission antenna diversity on a data transmission connection, which is set up between a transmitting unit (BS), wherein there are several transmission antenna routes (ANT1, ANT2, ANT3), and a receiving unit (MS1, MS2).Type: ApplicationFiled: November 29, 2006Publication date: March 29, 2007Inventors: Ari Hottinen, Risto Wichman
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Publication number: 20070019536Abstract: The invention is related to a network element, comprising: means for receiving feedback information from the user device; means for creating a first orthogonality measure by using the feedback information; means for creating a second orthogonality measure by comparing transmission resources; means for transmitting information to at least one user device.Type: ApplicationFiled: January 4, 2006Publication date: January 25, 2007Inventors: Jyri Hamalainen, Esa Tiirola, Risto Wichman
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Patent number: 7162272Abstract: In mobile communications systems transmission antenna diversity is used e.g. to compensate for fading caused to the signal on the radio path. It is known to make the choice of transmission antenna jointly for all subscriber connections, but it is not hereby possible to offer the optimum transmission antenna to simultaneous connections. The present invention aims at a method for implementing transmission antenna diversity on a data transmission connection, which is set up between a transmitting unit (BS), wherein there are several transmission antenna routes (ANT1, ANT2, ANT3), and a receiving unit (MS1, MS2). In the method, a broadcast signal is transmitted through all transmission antenna routes (ANT1, ANT2, ANT3) of the transmitting unit, with the aid of these signals a choice is made in the receiving unit (MS1, MS2) of the optimum transmission antenna route connected for use.Type: GrantFiled: September 13, 2000Date of Patent: January 9, 2007Assignee: Nokia CorporationInventors: Ari Hottinen, Risto Wichman
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Patent number: 7136627Abstract: A method for selecting a diversity mode to be applied by a transmitter having two cross-polarized antenna arrays, each representing a diversity branch, comprising the steps of: providing a plurality of diversity mode performance chart look-up tables, mapping a respective individual diversity mode to a respective pair of time correlation value and space correlation value for the two cross-polarized antenna array beams, wherein a respective individual diversity mode is presented by a mapping area, wherein the plurality of performance chart look-up tables is parameterized by an indication of a ratio of received powers from the diversity branches, first selecting one of the performance chart look-up tables dependent on determined ratio of received powers from separate beams, and second selecting one of the individual diversity modes according to the mapping to the determined actual time relation and space correlation values from the first selected performance chart look-up table.Type: GrantFiled: August 5, 2002Date of Patent: November 14, 2006Assignee: Nokia CorporationInventors: Jyri K. Hämäläinen, Risto Wichman
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Publication number: 20060148427Abstract: Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is disclosed. In a receiving station received transmission signals are processed and a feedback signal to be transmitted to a transmitting device is generated on the basis of the processed signals. Then, transmit weights to be applied to transmission signals are determined in accordance with the feedback signal.Type: ApplicationFiled: March 6, 2006Publication date: July 6, 2006Inventors: Jyri Hamalainen, Risto Wichman
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Publication number: 20060148415Abstract: Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is disclosed. In a receiving station received transmission signals are processed and a feedback signal to be transmitted to a transmitting device is generated on the basis of the processed signals. Then, transmit weights to be applied to transmission signals are determined in accordance with the feedback signal.Type: ApplicationFiled: March 6, 2006Publication date: July 6, 2006Inventors: Jyri Hamalainen, Risto Wichman