Sony International (europe) Gmbh

Other

Sony Corporation

Sony Deutschland Gmbh

Sony Electronics Inc

Veselin Brankovic

Dragan Krupezevic

Masayoshi Abe

Tino Konschak

Mohamed Ratni

Thomas D&ouml;lle

Gerald Oberschmidt

Noboru Sasho

Aleksandar Nesic

Hamid Amir-Alikhani

Kenichi Kawasaki

Yukitoshi Sanada

Lachlan Bruce Michael

Jens Wildhagen

Ryuji Kohno

Keiji Fukuzawa

Shinichiro Haruyama

Robert Morelos-Zaragoza

Kazuji Sasaki

Besma Kraiem

Janos Enderlein

Francis Swarts

Robert Morelos Zaragoza

Pieter Van Rooyen

Dragan Krupzevic

Dragan Krupezvic

Abe Masayoshi

A modulation identification device can be used for detecting the modulation type of a wirelessly transmitted and modulated RF signal without a-priori information on the kind of modulation used. The modulation identification device () comprises a n-port junction (), n being an integer equal to or larger than three. The n-port junction () is supplied with the modulated RF signal () and a second RF signal () from a local oscillator. The n-port junction () outputs at least one third RF signal to at least one power detector (). A signal processing unit () processes the power detected output of the n-port junction () to generate at least one flag () indicating the identified modulation type.

Modulation identification device

A wireless transmission system operating in a 60 GHz frequency range comprises fixed hubs (public download server) () and mobile terminals (). The fixed hubs () have antennas () with a wide angle beam shape. The mobile terminals () have antennas () with a narrow angle beam shape. The fixed hubs (public download server) () are connected by means of a connection line () to an information source such as a network backbone or a main server.

Wireless transmission system

An OFDM telecommunication device, i.e. a receiver, transmitter or transceiver for OFDM&#x2014;(Orthogonal Frequency-Division Multiplex) signals that generally employs the Inverse Fourier Transformation (IFT) technique to encode and transmit time-division multiplex signals and the Fourier Transformation (FT) technique to decode the received signals into time-division multiplex signals comprises a transformation unit () that incorporates at least an analog multiplication step and at least an analog convolution step of a multiplication convolution multiplication algorithm or a convolution multiplication convolution signal to perform a fourier transformation for demodulation and/or an inverse fourier transformation for modulation into the analog stage of said OFDM telecommunication device.

Telecommunication device with analog fourier transformation unit

An apparatus for a direct down-conversion of modulated RF signals, the device including: a first power detector connected between an input port for the modulated RF signal and ground, which outputs a first DC signal, a second power detector connected between an input port for a local oscillator signal and ground, which outputs a second DC signal, the local oscillator signal having the same center frequency as the modulated RF signal, and a third power detector connected between the input port for the modulated RF signal and the input port for the local oscillator signal, which outputs a third DC signal.

Five-port topology for direct down-conversion

The present invention relates to an I/Q demodulator () comprising a n-port structure () is provided, wherein n is an integer value of 4,5 or 6. The demodulator () is supplied at a first input () with a RF signal () which has to be demodulated. At a second input () it is supplied with a second RF signal (). The n&#x2212;2 output signals () are detected by power sensors (). After low pass filtering () the output signals of the power sensors () are multiplexed by a multiplexing means ().

Demodulator structure utilizing DC switches

The present invention relates to a method and a device for the I/Q demodulation of modulated RF signals. The I/Q demodulator () has a first input for the RF signal () to be demodulated and a second input for a RF signal () originating from a local oscillator (). The demodulator () combines the two RF signals () to generate three output signals supplied to three power detectors. In a combination unit () the three power signals of the power detectors are merged in two signal branches wherein after passing an A/D converting () and digital processing unit () one signal is the I component and the other one is the Q component of the received modulated RF signal ().

I/Q demodulator device with three power detectors and two A/D converters

An antenna device, comprising a dielectric substrate board (), dipole means () formed on the substrate board (), and reflector member () having first and second reflective surfaces which are aparallel to each other define a first angle between each other. A positional relationship between the substrate board () and the reflector member () is such that the substrate board () and a vertex of the first angle (&#x3b1;) substantially lie in the same plane and the first and second reflective surfaces lie on opposite sides of the plane, a second angle defined between the substrate board () and the first reflective surface being different from zero each. In this way, an antenna device suitable for use in a broad variety of applications is provided which allows easy modification of its antenna characteristics by adjusting the angle between the reflective surfaces and/or the angular position of the reflector member () with respect to the substrate board ().

Dipole feed arrangement for corner reflector antenna

The universal platform for the SDR of the present invention employs the direct conversion approach with the n-port MMIC followed by reconfigurable reprogrammable devices such as DSP's or FPGA's. The universal platform is based on the linear operation of the devices. Thus, the DC offset problem may be solved. It is also possible to support very wide bandwidths compared with conventional I/Q receivers. Therefore, the present universal platform is suitable for multimode and multiband communications.

Universal platform for software defined radio

A demodulator for modulated RF signals comprises a passive four port structure ( ). The four port structure ( ) has a first input ( ) for supplying a modulated RF signal to be demodulated. A second input ( ) is supplied with a RF signal from a local oscillator ( ). Two output terminals are connected to power sensors ( ). The RF signal from the local oscillator ( ) is supplied to the second input ( ) of the four port structure ( ) without being RF switched by an RF switch. The demodulator is particularly useful for modulation schemes with a finite number of magnitude states (nQAM modulation).

Demodulator and method for the demodulation of modulated RF signals

A three port structure for the down conversion demodulation of a digitally modulated RF signal is proposed, wherein no RF switches are provided. The three port structure ( ) has a first input ( ) for the RF signal to be down converted and a second input ( ) for a RF signal originating from a local oscillator ( ). An output ( ) of the three port structure ( ) is supplied to a power sensor unit ( ). The RF signal from the local oscillator ( ) is modulated ( ) before it is supplied to the three port structure ( ).

Three port structure with modulated LO signal

Calibration of a N-port receiver

The present invention relates to a demodulation structure and method for downconverting and demodulating a digitally modulated signal S , with a local oscillator means ( ) for providing a local oscillator signal S a mixer means ( ) for mixing said local oscillator signal S and said digitally modulated signal S in order to obtain a mixed signal, a lowpass filter means ( ) for lowpass filtering the mixed signal from the mixer means ( ) and an analog-to-digital converting means ( ) for converting the filtered signal from the lowpass filter means ( ) into a downconverted and demodulated digital signal S , whereby the local oscillator signal is set in respect to the modulated digital signal so that the downconverted and demodulated digital signal output from the analog-to-digital converting means comprises to serially arranged information parts. The present demodulation structure provides a very simple structure with improved amplitude and phase imbalances.

Demodulation structure and method

A high performance demodulator, capable of realizing further broadband characteristics, low distortion, a low power consumption, and small fluctuation in characteristics against fluctuations in temperature and fluctuations over time compared with a conventional multi-port demodulators, wherein a two-terminal first phase shifter three-terminal second branch circuit two-terminal second phase shifter and three-terminal third branch circuit are connected in series between a first signal input terminal TINSr for a reception signal and a second signal input terminal TINSlo for a local signal, a third terminal c of a first branch circuit is connected to a first power detection circuit a third terminal c of the second branch circuit is connected to a second power detection circuit and a third terminal c of the third branch circuit is connected to a third power detection circuit and comprising an N-port signal-IQ signal conversion circuit for receiving output signals P P and P of the first to third power detection circuits to and converting the same to demodulation signals, that is, in-phase signal I(t) and a quadrature signal Q(t), by a computation circuit.

Demodulator and receiver

A high performance power detector not only suited for monolithic structures, small in size, low in cost, and suitabed for broadband high frequency operations, but also excellent in the linearity of the detection characteristic, having a small fluctuation of detection characteristic relative to the bias fluctuation, having a small fluctuation of detection characteristic relative to the FET threshold voltage fluctuation, and in addition having a small DC offset wherein an additional circuit is unnecessary even if the latter stage circuit has a balance input, and a demodulator using the same.

Power detecting circuit and demodulator comprising the same

A RF receiver for modulated RF signals based on a N-port junction ( ) providing LO/RF isolation is proposed. N thereby is an integer larger than two, such that the N-port junction ( ) can be preferably a three port, four port, five port and six port junction. The N-port junction ( ) supplied with a first RF signal at a first input ( ) and with a second RF signal originating from a local oscillator ( ) at a second input ( ). An isolation block ( ) comprising an active circuitry ( ) is comprised in the N-port junction for isolating the second input ( ) from the first input ( ). Thereby can be ensured that the LO signals are significantly attenuated at the RF port ( ).

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Esslingen, Germany

Veselin Brankovic