Patents by Inventor Jaakko Hulkko
Jaakko Hulkko 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: 10820374Abstract: This document discloses a solution for connecting wireless networks. According to an aspect, a method comprises: establishing, by a gateway device, a first physical layer connection with a first device of a two-way radio network operating according to a two-way radio network protocol, establishing, by the gateway device, a second physical layer connection with a second device of a wireless network operating according to a wireless communication protocol different from the two-way radio network protocol; and connecting, by the gateway device, a communication connection established between the second device and the wireless network to the first device through the first physical layer connection and the second physical layer connection.Type: GrantFiled: May 13, 2019Date of Patent: October 27, 2020Assignee: BITTIUM WIRELESS OYInventors: Timo Piironen, Jaakko Hulkko, Veli Matti Lastumäki
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Publication number: 20190350050Abstract: This document discloses a solution for connecting wireless networks. According to an aspect, a method comprises: establishing, by a gateway device, a first physical layer connection with a first device of a two-way radio network operating according to a two-way radio network protocol, establishing, by the gateway device, a second physical layer connection with a second device of a wireless network operating according to a wireless communication protocol different from the two-way radio network protocol; and connecting, by the gateway device, a communication connection established between the second device and the wireless network to the first device through the first physical layer connection and the second physical layer connection.Type: ApplicationFiled: May 13, 2019Publication date: November 14, 2019Inventors: Timo PIIRONEN, Jaakko HULKKO, Veli Matti LASTUMÄKI
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Patent number: 5819165Abstract: The invention is based on utilizing the receiver of a radio device to detect measured quantities related to a transmission signal. In the power regulating method according to the present invention, which is based on a power regulating loop, transmission power is detected in the receiver of the radio device. Part of the transmission signal (f.sub.TX) is input to the carrier frequency part of the signal path of the receiver by and detected. A signal that is proportional to the power level is produced by a RSSI detector of the receiver, for example. The same circuit can also be utilized in the linearization of a transmission signal based on a closed loop by means of predistortion. Both the power regulation method and the linearization method can be applied in radio telephone systems based on both time-division and continuous transmission and reception.Type: GrantFiled: June 27, 1997Date of Patent: October 6, 1998Assignee: Nokia Mobile Phones Ltd.Inventors: Jaakko Hulkko, Merja Vuolteenaho
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Patent number: 5740521Abstract: In the frequency synthesizer, the stable transmission frequency required by the digital operating mode is created from a frequency produced by a free running oscillator and which includes frequency errors. A local frequency (f.sub.1) and an intermediate frequency (f.sub.IF) including frequency errors are input to a mixer (105) located in the signal path of the transmitter. A transmission frequency transmission signal (f.sub.TX) is input to a phase-lock loop with a voltage-controlled oscillator (103) that produces the local frequency (f.sub.1). Thereby the frequency error caused by the intermediate frequency (f.sub.IF) can be corrected with the local frequency (f.sub.1) by adjusting the voltage-controlled oscillator (103) of the loop with a voltage (V.sub.D) that is proportional to the phase difference between the transmission frequency signal and a reference signal (V.sub.REF) input to a phase comparator.Type: GrantFiled: November 13, 1995Date of Patent: April 14, 1998Assignee: Nokia Mobile Phones Ltd.Inventors: Jaakko Hulkko, Merja Vuolteenaho
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Patent number: 5734683Abstract: A sigma-delta signal converter is implemented using switched capacitor switching elements in which a first switch (31) serves as a mixer (11). The output of the mixer is directed to the second input of an adder (16), and its second input is the feedback signal (f1) of the sigma-delta signal converter, which is also directed into a base-frequency output signal through a decimator (14) and low-pass filtering (15).Type: GrantFiled: March 29, 1996Date of Patent: March 31, 1998Assignee: Nokia Mobile Phones LimitedInventors: Jaakko A. Hulkko, Veijo L. H. Kontas, Lauri T. Siren
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Patent number: 5551067Abstract: A method of controlling an external radio frequency amplifier of a radio telephone and a control system therefore. The power amplifier of the transmission side of the radio frequency amplifier is controlled to turn on and off, on the basis of at least one control signal (BENA1, BENA2) entering the radio frequency amplifier separate from a signal to be transmitted from the radio telephone. The control signal (BENA1, BENA2) contains information about the starting and ending instant of transmission.Type: GrantFiled: March 30, 1995Date of Patent: August 27, 1996Assignee: Nokia Mobile Phones Ltd.Inventors: Jaakko Hulkko, Jorma Matero, Toivo Vilmi
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Patent number: 5530923Abstract: A dual mode transmitter circuit is disclosed including a non-linear high-power amplifier having an amplification that can be adjusted and a linear high-power amplifier. A first switch and a second switch are connected to the input and output of the linear, high-power amplifier. An amplification-adjustable, high-frequency transmitter control amplifier is connected to the input of the non-linear high-power amplifier. Apparatus for measuring transmission power such as a directional coupler is connected to the second switch, and a duplex filter is connected to the directional coupler. A power level control circuit is responsive to the measured transmission power from the directional coupler and to a power level signal. The power level signal is representative of the desired output power of the transmitter.Type: GrantFiled: March 30, 1994Date of Patent: June 25, 1996Assignee: Nokia Mobile Phones Ltd.Inventors: Jarmo Heinonen, Jaakko Hulkko, Toivo Vilmi
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Patent number: 5471652Abstract: The invention relates to a general purpose circuit arrangement for a radio telephone wherein the universal application possibilities have been provided by phase-locked circuits (PLL1 to PLL3) and by a multiplier circuit (11, 12) that can be controlled (signals Select x1/x2 and Synte sel./Data) by the processor of the mobile telephone. The second harmonic or the fundamental frequency is selected by the multiplier circuit from the VCO oscillators (61, 62). In this way, the frequencies of the synthesizer circuits (UHF1, UHF2, UHF3) can be set independently of each other and according to the requirements of the respective cellular networks. The central circuits are advantageously integrated into four IC circuits (IC1 to IC4).Type: GrantFiled: July 26, 1993Date of Patent: November 28, 1995Assignee: Nokia Mobile Phones Ltd.Inventor: Jaakko Hulkko
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Patent number: 5446422Abstract: A dual-mode radiotelephone terminal includes a .pi./4-shift DQPSK modulator (11). A dual-mode modulation is achieved by mixing an output of a transmitter oscillator (16) with an output of an offset oscillator (18) to form an injection signal (LO) at a final transmitter frequency, the injection signal being further modulated with a quadrature modulator in a digital mode of operation. In an analog mode of operation the transmitter oscillator or the offset oscillator is frequency modulated and the quadrature modulator is disabled with a bias signal, thereby passing the frequency modulated injection signal without substantial attenuation. The LO signal is regenerated and also phase shifted with a circuit (35) having a frequency multiplier (30) and a frequency divider (34). The circuit outputs two local oscillator (LO) signals (LOA and LOB), each of which directly drives an associated quadrature mixer (36, 38) of the modulator.Type: GrantFiled: September 14, 1994Date of Patent: August 29, 1995Assignee: Mokia Mobile Phones Ltd.Inventors: Heikki Mattila, Jorma Matero, Jaakko Hulkko
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Patent number: 5392460Abstract: A dual-mode radiotelephone terminal includes a .pi./4-shift DQPSK modulator (11). A dual-mode modulation is achieved by mixing an output of a transmitter oscillator (16) with an output of an offset oscillator (18) to form an injection signal (LO) at a final transmitter frequency, the injection signal being further modulated with a quadrature modulator in a digital mode of operation. In an analog mode of operation the transmitter oscillator or the offset oscillator is frequency modulated and the quadrature modulator is disabled, thereby passing the frequency modulated injection signal without substantial attenuation. The LO signal is regenerated and also phase shifted with a circuit (35) having a frequency multiplier (30) and a frequency divider (34). The circuit outputs two local oscillator (LO) signals (LOA and LOB), each of which directly drives an associated quadrature mixer (36, 38) of the modulator.Type: GrantFiled: April 23, 1993Date of Patent: February 21, 1995Assignee: Nokia Mobile Phones Ltd.Inventors: Heikki Mattila, Jorma Matero, Jaakko Hulkko
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Patent number: 4998078Abstract: The invention relates to a dividing network in the support station in a radio telephone network, wherein the received multi-channel antenna signal (ANT) is divided among separate receivers (CH1-CHn) by means of a dividing unit. The dividing unit is made up of a filter (2), an amplifier (3) and a dividing network (1). According to the invention it has, in a cascade (11; 21), N directional couplers (H1-Hn; B1-Bn), there being branched out from the cascade in succession to each of the N receivers (CH1-CHn) a share, according to the coupling (k1-kn) of the directional coupler, of the filtered and amplified antenna signal (4).Type: GrantFiled: April 11, 1989Date of Patent: March 5, 1991Assignee: Nokia-Mobira OyInventor: Jaakko Hulkko
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Patent number: 4856080Abstract: A circuitry in a diversity unit of an FM receiver for a telephone system having at least two channels for receiving signals, and at least one phase-lock loop. The signals received by the channels which possibly differ from each in amplitude and frequency. Each channel comprises a mixer and a band-pass filter for forming an intermediate-frequency signal. The phase-lock loop has phase-lock branches operably connected between each mixer of the channels which comprises a frequency-phase comparator. The phase-lock loop equalizes the channel signals in phase and amplitude. The phase-lock loop further has a summation circuit for adding the channel signals which have been equalized. The frequency-phase comparator has a single phase-lock branch exiting therefrom along with a voltage-controlled oscillator connected to one of the mixers of one of the channels. The voltage-controlled oscillator has a switch on an input side thereof.Type: GrantFiled: November 10, 1987Date of Patent: August 8, 1989Assignee: Nokia-Mobira OyInventor: Jaakko Hulkko