Nokia Corporation

Broadcom Corporation

Loupedeck Oy

Other

Nokia Technologies Oy

Pauli Mikael Seppinen

Petri Tapani Eloranta

Jussi Vepsäläinen

Mikael Gustafsson

Aarno Tapio Pärssinen

Juha Samuel Hallivuori

Risto Heikki Kaunisto

Niall Eric Shakeshaft

Aarno P&auml;rssinen

Julius Koskela

Mikko J Rinne

Jussi Kustaa Ojala

Heikki Tapani Kangasmaa

Mika P Rinne

Jouni Kaukovuori

Markus Nentwig

Jari Johannes Heikkinen

Jonne Juhani Riekki

Kim Kaltiokallio

Mika Salmi

Miikka Hämäläinen

Kalle Asikainen

Jussi Veps&auml;l&auml;inen

Sami Seppo Antero Kallioinen

Aarno Pārssinen

Mika Makitalo

Jouni Kristian Kaukovuori

Petri Eloranta

Console

Multimedia editing console

A receiver circuit comprising a connection portion for guiding each one of a first predefined number of carrier signals of multiple carriers to one of a number of receive branches, each receive branch comprising at least one amplifier load structure, the number of receive branches being equal to the first predefined number. The receiver circuit also comprises a mixing portion for generating a second predefined number of mixed carrier signals on each receive branch by mixing a carrier signal on each one of the receive branches with a number of local oscillator frequencies equal to the second predefined number, and a selection portion for selecting one of the second predefined number of mixed carrier signals on each receive branch to be output via a number of output paths equal to the first predetermined number to a digital data path.

Direct conversion receiver circuit for concurrent reception of multiple carriers

A method, device, and system that use narrowband channels to provide higher re-use without multiplying the operator spectrum requirement. If a communication system supports variable carrier bandwidth channels, the narrow channel capacity can be divided among adjacent cells to provide higher re-use.

Variable bandwidth in a communication system

Measures are provided for performing direct radio-frequency to digital conversion. A radio-frequency input signal is compared with a plurality of reference voltages to generate a plurality of comparison signals, each comparison signal corresponding to one of the plurality of reference voltages. One or more of the plurality of generated comparison signals are first filtered to generate a first filtered signal. One or more of the plurality of generated comparison signals are second filtered to generate a second filtered signal. A digital output signal is generated at least on the basis of the first filtered signal and the second filtered signal.

Analogue to digital converter

A cellular telecommunications terminal having a full-duplex mode of operation and a half-duplex mode of operation, including a first cellular transmitter and a first cellular receiver operable, when the terminal is in the full-duplex mode, to transmit and receive at the same time and operable, when the terminal is in the half-duplex mode, to transmit and receive at different times and not at the same time; and a switching control for changing the mode of operation of the terminal while operating in the full-duplex mode from the full-duplex mode to the half-duplex mode.

Terminal having a variable duplex capability

The invention relates to a device and a method for converting a digital signal having a plurality of data-bits into a filtered analog signal. A device according to the invention includes a delay element arranged to produce one or more differently delayed version of the digital signal and a digital-to-analog conversion circuitry arranged to convert the digital signal and the one or more differently delayed, and possibly differently scaled, versions of the digital signal into analog signals and to produce the filtered analog signal as a combination of the analog signals. Therefore, the device constitutes not only a digital-to-analog-converter but also a finite impulse response filter.

Method and device for digital-to-analog conversion with filtering

The invention relates to a method for controlling output power of a radio transmitter, the radio transmitter operating on a radio channel. The method includes determining requested output power level, and deriving output power, which is to be used, on the basis of a power control algorithm having at least a first and a second power control area, maximum output power of the first area being derived at least on the basis of theoretical minimum attenuation to adjacent receivers, and maximum output power of the second area being derived at least on the basis of actual minimum attenuation to adjacent receivers, wherein an adjacent receiver is a receiver operating on an adjacent channel with respect to the operating channel of said radio transmitter.

Power control

A radio frequency receiver, includes a first component block; a second compensating component block-; and control circuitryoperable for controlling the state (e.g., load, bias, gain) of the first component block. When the control circuitrycauses a change in the state of the first component block that is expected to induce a DC offset in a signal, the control circuitrychanges the state of the second component block to compensate for an estimate of the DC offset. Preferably, the second component block is a filter-, that temporarily changes from a nominal cutoff frequency to an elevated cutoff frequency so that voltage will settle quickly and accurately at an estimated voltage, the estimated voltage being predetermined and based on the state change to the first component block. A method is also described for practicing the invention.

Method and apparatus for compensating DC level in an adaptive radio receiver

A method for continuously determining the required dynamic range for an analog-to-digital converter by determining the received signal strength and using this received signal strength value in combination with the overall dynamic range for the ADC and the target resolution of the ADC to decode a radio channel in the absence of interference, wherein the target resolution is also related to the type of decoding to be performed subsequent to analog-to-digital conversion. The method allows for a reduction in power consumption associated with the ADC, especially when the incoming signal is received with few interfering radio channels and with a relatively high signal strength. The present method can be combined with gain control and analog alert detection.

Method and apparatus for continuously controlling the dynamic range from an analog-to-digital converter

The present invention provides a method for automatic calibration of a signal path in receivers (e.g., radio frequency receivers) using a noise (and not a specific test signal) as a source and a fast Fourier transform (FFT) of the noise for correcting various parameters related to an inphase/quadrature (I/Q) imbalance in a frequency domain. The present invention (method and apparatus) can provide detecting and correcting an I/Q phase error, an I/Q amplitude error, an absolute corner frequency of the analog baseband filter, and a relative corner frequency of the analog baseband filters just by using the noise as a stimuli. This calibration can be used for a factory calibration or it can be used as an on-site calibration for base stations. Mobile devices can calibrate themselves independently of their location. This reduces the requirements for the test equipment in the manufacturing and maintenance stages.

Automatic receiver calibration with noise and fast fourier transform

A polar transmitter, operable in linear mode or switched mode, uses a conversion module to convert baseband signals into amplitude data and phase data. The phase data is used to phase modulate a carrier frequency in a radio frequency conversion module. The module comprises a plurality of parallel unit cells, each being a mixer cell type converter having a differential data switch section connected in series to a differential local oscillator-switch pair. The differential local oscillator-switch is connected in series to a current source. Each unit cell is adapted to receive a signal through an input end. In switched mode, the phase-modulated carrier frequency is amplitude modulated by the amplitude data through the supply voltage to a power amplifier. In linear mode, amplitude data is conveyed to the input end of the unit cells for modulating the phase-modulated carrier frequency in the conversion module.

Polar transmitter with digital to RF converter

A radio frequency (RF) transmitter uses two digital-to-RF conversion modules to convert digital baseband signals into RF signals. In cartesian mode, baseband signals are conveyed to the conversion modules for RF conversion. In polar mode, baseband signals are converted into amplitude and phase data parts. Phase data part is converted into I (inphase) and Q (quadrature) data parts to be converted into RF signals which are modulated in a power amplifier by amplitude data part through the power supply of the power amplifier. Each digital-to-RF module uses parallel unit cells to perform digital-to-analog (D/A) conversion and upconversion functions by an IF signal. Each unit cell, adapted to receive a control voltage indicative of a data signal value, is a mixer cell type converter having a differential data switch section connected in series to a differential LO (local oscillator)-switch pair. LO-switch is further connected in series to a current source.

Reconfigurable transmitter with direct digital to RF modulator

The invention relates to a device for digital-to-radio frequency conversion, the device comprising: conversion cell matrices for digital-to-radio frequency conversion; means for providing a digital data signal; means for dividing the digital data signal into data signal groups; means for generating clock signals, the clock signals having different phases, the number of clock signals being the same as the number of data signal groups; means for synchronizing the data signal groups by using the clock signals; means for conveying the synchronized data signal groups to the conversion cell matrices, the number of conversion cell matrices being the same as the number of data signal groups; and means for synchronizing each conversion cell matrix by using the clock signal with which the synchronized data signal group conveyed thereto was synchronized for generating interpolation values.

Growing community of inventors

Vantaa, Finland

Pauli Mikael Seppinen