Patents by Inventor Seppo Rosnell
Seppo Rosnell 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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Publication number: 20080248766Abstract: A transmitter for generating modulated signals is shown, wherein in a first-type operating mode, a first digital signal is input into a digital-to-analog converter to obtain a first analog signal that is input into a first-type unit, in which a first-type modulated signal is generated in dependence on at least the first analog signal; and wherein in a second-type operating mode, a second digital signal is input into the digital-to-analog converter to obtain a second analog signal that is input into a second-type unit, in which a second-type modulated signal is generated in dependence on at least the second analog signal. Correspondingly, a wireless communication device is shown, as well as a base station, a module in a wireless communication device, a module in a base station, an integrated circuit, a method, a computer program and a computer program product.Type: ApplicationFiled: June 11, 2008Publication date: October 9, 2008Inventors: Seppo Rosnell, Mika Salmi, Simo Murtojarvi
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Patent number: 7403750Abstract: A transmitter for generating modulated signals is shown, wherein in a first-type operating mode, a first digital signal is input into a digital-to-analog converter to obtain a first analog signal that is input into a first-type unit, in which a first-type modulated signal is generated in dependence on at least the first analog signal; and wherein in a second-type operating mode, a second digital signal is input into the digital-to-analog converter to obtain a second analog signal that is input into a second-type unit, in which a second-type modulated signal is generated in dependence on at least the second analog signal. Correspondingly, a wireless communication device is shown, as well as a base station, a module in a wireless communication device, a module in a base station, an integrated circuit, a method, a computer program and a computer program product.Type: GrantFiled: April 25, 2005Date of Patent: July 22, 2008Assignee: Nokia CorporationInventors: Seppo Rosnell, Mika Salmi, Simo Murtojärvi
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Publication number: 20060240789Abstract: A transmitter for generating modulated signals is shown, wherein in a first-type operating mode, a first digital signal is input into a digital-to-analog converter to obtain a first analog signal that is input into a first-type unit, in which a first-type modulated signal is generated in dependence on at least the first analog signal; and wherein in a second-type operating mode, a second digital signal is input into the digital-to-analog converter to obtain a second analog signal that is input into a second-type unit, in which a second-type modulated signal is generated in dependence on at least the second analog signal. Correspondingly, a wireless communication device is shown, as well as a base station, a module in a wireless communication device, a module in a base station, an integrated circuit, a method, a computer program and a computer program product.Type: ApplicationFiled: April 25, 2005Publication date: October 26, 2006Inventors: Seppo Rosnell, Mika Salmi, Simo Murtojarvi
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Patent number: 7054597Abstract: The invention relates to a transmitter which comprises a modulator providing a phase-modulated constant-envelope radio-frequency signal, and to a method of controlling the power level of a signal output by such a transmitter. In order to enable a power control over a large power range, it is proposed that a provided phase-modulated constant-envelope radio-frequency signal is divided into two identical signals for the power control. A first control arrangement then controls the output power for higher power levels by controlling amplifications applied to the two signals. A second control arrangement controls the output power for lower power levels by controlling phase shifts applied to the two signals. The processed signals are then combined and provided as a power controlled output signal.Type: GrantFiled: June 25, 2003Date of Patent: May 30, 2006Assignee: Nokia CorporationInventor: Seppo Rosnell
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Patent number: 6993087Abstract: Switching mode power amplifiers using pulse width modulation (PWM) and pulse position modulation (PPM) for generating bandpass signals is disclosed. Fully digital implemented transmitter structures having QPSK inputs for phase and amplitude are described.Type: GrantFiled: June 29, 2001Date of Patent: January 31, 2006Assignee: Nokia Mobile Phones Ltd.Inventors: Seppo Rosnell, Jukka Varis
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Patent number: 6975177Abstract: In a modulation system, in order to provide a two-level signal with a desired modulation which is suited to be amplified by a switching mode power amplifier, the modulation system may include a first constant envelope modulator modulating a signal according to a first control signal, a second constant envelope modulator modulating a signal according to a second control signal, and a combining portion combining the output signal of the first and said second constant envelope modulator to a single, two-level pulse-width-modulated signal. The information which is to be represented by the modulation of the single, two-level pulse-width-modulated signal is coded in the first and the second control signals. The invention relates equally to a corresponding method for generating a modulated signal.Type: GrantFiled: June 9, 2003Date of Patent: December 13, 2005Assignee: Nokia CorporationInventors: Jukka Varis, Seppo Rosnell
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Patent number: 6917244Abstract: The invention relates to a power control structure comprising a switching mode power amplifier for receiving an input signal, for amplifying the received input signal and for providing the amplified signal as output signal. In order to enable a power control over a large range while preserving the efficiency of the power amplifier, the structure further comprises a first control arrangement for controlling the power level of the output signal at least at higher desired power levels by adjusting a power supply provided to the switching mode power amplifier, and in addition a second control arrangement for controlling the power level of the output signal at least at lower desired power levels by adjusting the power of the input signal before it is provided to the switching mode power amplifier. The invention relates equally to a corresponding method.Type: GrantFiled: June 10, 2003Date of Patent: July 12, 2005Assignee: Nokia CorporationInventors: Seppo Rosnell, Jukka Varis
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Patent number: 6914472Abstract: Phase modulating systems and methods for modulating the phase of a signal are based on a digital control signal used to select one of a plurality of carriers having different phase angles. In order to reduce the number of short delays that have to be applied to the original signal for obtaining the plurality of carriers, it is proposed that delay elements are arranged in a matrix form. Alternatively, phase shifts are realized by digital frequency dividers instead of by delay elements. Further alternatively or in addition, part of the required delay is approximated or realized by an analog phase shifter. In case the phase modulating system is to be employed for modulating signals of different frequencies, the digital control signal is scaled with a factor associated to the respective frequency in order to change the addressing range for selecting a carrier from among the plurality of carriers.Type: GrantFiled: March 6, 2003Date of Patent: July 5, 2005Assignee: Nokia CorporationInventor: Seppo Rosnell
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Patent number: 6870414Abstract: The invention relates to a system and a method for applying a continuously tuned phase shift to a periodic signal. In order to avoid distortions in the output phase shifted periodic signal, it is proposed that a phase shifting according to a first control signal and a phase shifting according to a second control signal are applied to the periodic signal in parallel. Both control signals are identical to each other, but shifted in time against each other. Both control signals are varying within a specific range and are jumping between their maximum and minimum value whenever a boarder of this range is reached. The first phase shifted periodic signal and the second phase shifted periodic signal are selected alternately in a way that phase shifts which are based on a portion of a control signal close to its jumping between its maximum and minimum values are excluded.Type: GrantFiled: March 7, 2003Date of Patent: March 22, 2005Assignee: Nokia CorporationInventor: Seppo Rosnell
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Publication number: 20040266368Abstract: The invention relates to a transmitter which comprises a modulator providing a phase-modulated constant-envelope radio-frequency signal, and to a method of controlling the power level of a signal output by such a transmitter. In order to enable a power control over a large power range, it is proposed that a provided phase-modulated constant-envelope radio-frequency signal is divided into two identical signals for the power control. A first control arrangement then controls the output power for higher power levels by controlling amplifications applied to the two signals. A second control arrangement controls the output power for lower power levels by controlling phase shifts applied to the two signals. The processed signals are then combined and provided as a power controlled output signal.Type: ApplicationFiled: June 25, 2003Publication date: December 30, 2004Applicant: Nokia CorporationInventor: Seppo Rosnell
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Publication number: 20040251962Abstract: The invention relates to a power control structure comprising a switching mode power amplifier for receiving an input signal, for amplifying the received input signal and for providing the amplified signal as output signal. In order to enable a power control over a large range while preserving the efficiency of the power amplifier, the structure further comprises a first control arrangement for controlling the power level of the output signal at least at higher desired power levels by adjusting a power supply provided to the switching mode power amplifier, and in addition a second control arrangement for controlling the power level of the output signal at least at lower desired power levels by adjusting the power of the input signal before it is provided to the switching mode power amplifier. The invention relates equally to a corresponding method.Type: ApplicationFiled: June 10, 2003Publication date: December 16, 2004Applicant: Nokia CorporationInventors: Seppo Rosnell, Jukka Varis
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Publication number: 20040246060Abstract: In a modulation system,.in order to provide a two-level signal with a desired modulation which is suited to be amplified by a switching mode power amplifier, the modulation system may include a first constant envelope modulator modulating a signal according to a first control signal, a second constant envelope modulator modulating a signal according to a second control signal, and a combining portion combining the output signal of the first and said second constant envelope modulator to a single, two-level pulse-width-modulated signal. The information which is to be represented by the modulation of the single, two-level pulse-width-modulated signal is coded in the first and the second control signals. The invention relates equally to a corresponding method for generating a modulated signal.Type: ApplicationFiled: June 9, 2003Publication date: December 9, 2004Applicant: Nokia CorporationInventors: Jukka Varis, Seppo Rosnell
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Publication number: 20040174232Abstract: The invention relates to a system and a method for applying a continuously tuned phase shift to a periodic signal. In order to avoid distortions in the output phase shifted periodic signal, it is proposed that a phase shifting according to a first control signal and a phase shifting according to a second control signal are applied to the periodic signal in parallel. Both control signals are identical to each other, but shifted in time against each other. Both control signals are varying within a specific range and are jumping between their maximum and minimum value whenever a boarder of this range is reached. The first phase shifted periodic signal and the second phase shifted periodic signal are selected alternately in a way that phase shifts which are based on a portion of a control signal close to its jumping between its maximum and minimum values are excluded.Type: ApplicationFiled: March 7, 2003Publication date: September 9, 2004Applicant: Nokia CorporationInventor: Seppo Rosnell
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Publication number: 20040174222Abstract: Phase modulating systems and methods for modulating the phase of a signal are based on a digital control signal used to select one of a plurality of carriers having different phase angles. In order to reduce the number of short delays that have to be applied to the original signal for obtaining the plurality of carriers, it is proposed that delay elements are arranged in a matrix form. Alternatively, phase shifts are realized by digital frequency dividers instead of by delay elements. Further alternatively or in addition, part of the required delay is approximated or realized by an analog phase shifter. In case the phase modulating system is to be employed for modulating signals of different frequencies, the digital control signal is scaled with a factor associated to the respective frequency in order to change the addressing range for selecting a carrier from among the plurality of carriers.Type: ApplicationFiled: March 6, 2003Publication date: September 9, 2004Applicant: Nokia CorporationInventor: Seppo Rosnell
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Patent number: 6775558Abstract: For establishing a local communication connection between a terminal (102) of a cellular radio system and an accessory device (103), a radio channel is identified (301, 302) on which there is no perceivable radio traffic in the cellular radio system, and a communication connection is established (303, 501) between the terminal and the accessory device on the identified radio channel. The radio channel is preferably a code channel of a CDMA system.Type: GrantFiled: November 10, 1999Date of Patent: August 10, 2004Assignee: Nokia Mobile Phones LimitedInventors: Jukka Ranta, Jouko Häkkänen, Seppo Rosnell, Tapani Ekman
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Publication number: 20030144003Abstract: The invention relates to a method for handling a connection in a mobile system where a direct mode connection is established between at least two mobile stations (MSA, MSB). The method comprises the steps of allocating an available traffic channel to the direct mode connection through a base station (BS) of the mobile network in response to a call sent by one of the mobile stations (MSA), establishing the direct mode connection between the mobile stations (MSA, MSB), and transmitting information concerning the direct mode connection on a control channel between the base station (BS) of the mobile network and one of the mobile stations (MSA) during the direct mode connection.Type: ApplicationFiled: November 5, 2002Publication date: July 31, 2003Inventors: Jukka Ranta, Harri Jokinen, Seppo Rosnell, Otto-Aleksanteri Lehtiene
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Publication number: 20030058956Abstract: Switching mode power amplifiers using pulse width modulation (PWM) and pulse position modulation (PPM) for generating bandpass signals is disclosed. Fully digital implemented transmitter structures having QPSK inputs for phase and amplitude are described.Type: ApplicationFiled: June 29, 2001Publication date: March 27, 2003Inventors: Seppo Rosnell, Jukka Varis
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Patent number: 6288606Abstract: A linear power amplifier arrangement is used for providing a selectable amount of amplification to a radio frequency signal to be amplified. The arrangement comprises a first parallel amplifier branch and a second parallel amplifier branch and means for conducting the radio frequency signal to be amplified selectably to one of the parallel amplifier branches. Additionally it comprises in the first parallel amplifier branch a series connection of a predistorter and a nonlinear amplifier, where said predistorter is arranged to compensate for the nonlinearity of said nonlinear amplifier.Type: GrantFiled: November 9, 1999Date of Patent: September 11, 2001Assignee: Nokia Mobile Phones Ltd.Inventors: Tapani Ekman, Seppo Rosnell, Risto Väisänen
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Patent number: 5460019Abstract: The invention concerns a drum washer. The washer has a shaft formed by two cones (46) placed with their bases against one another. The shaft can be used as a supporting structure for the drum. Vanes (48) can also be placed on it for assisting in collecting washing liquid falling from the upper part of the drum separately from the washing liquid ending up on the bottom of the drum. The washer is especially suitable for washing cellulose pulp.Type: GrantFiled: November 23, 1993Date of Patent: October 24, 1995Assignee: Sunds Defibrator Pori OyInventors: Alpo Ojala, Seppo Rosnell
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Patent number: 5421176Abstract: The invention concerns a drum washer. The washer has two plates (14; 18) located after each other in parallel with the drum, and the pulp to be washed is conducted between these plates. Between the plates there is a gap (22) closed by a flap valve (25) by way of which gap washing liquid is conducted through the mat. The washer is especially suitable for washing cellulose pulp.Type: GrantFiled: November 23, 1993Date of Patent: June 6, 1995Assignee: Sunds Defibrator Pori OyInventors: Alpo Ojala, Seppo Rosnell, Reima Karke