Ihp Gmbh-Innovations for High Performance Microelectronics/leibniz-Institut Fur Innovative Mikroelektronik

Ihp Gmbh-Innovations for High Performance Microelectronics/institut Fur Innovative Mikroelektronik

Ihp, Gmbh

Ihp Gmbh—innovations for High Performance Microelectronics/liebniz-Institut Fur Innovative Mikroelektronik

Ihp—innovations for High Performance Microelectronics/leibniz-Instit Fur Innovative Mikroelektronik

Ihp Gmbh-Innovayions for High Performance Microelectronics/institut Fur Innovative Mikroelektronik

Eckhard Grass

Gerhard Kahmen

Milos Krstic

Koushik Maharatna

Chafik Meliani

Frank Winkler

Vladica Sark

Alfonso Troya

Jesus Gutierrez Teran

Banerjee Swapna

Dhar Anindya Sundar

Xin Fan

The present invention relates to a phased array antenna () with an electronically variable antenna pattern, wherein control signals for at least two phased antenna elements () are processed for a broadcast transmission and are broadcast to the phased antenna elements () via a wireless medium or using feed lines for useful signal components of the phased antenna elements in a frequency band differing from the frequency band of the useful signal components. As a result of using the broadcast transmission in a different frequency band, there is no need for any additional signals or lines for the array antenna, and the complexity of the array antenna can be reduced and the flexibility and reconfigurability can be improved.

Electronically pivotable array antenna with broadcast-based control

A method and system for oversampling a waveform with variable oversampling factor is suggested. The method and for dynamic selection of the oversampling factor are based on a modified equivalent time sampling approach. Multiple waveforms are transmitted, which are separated by a variable delay. The method permits that a receiver selects a different oversampling factor for the received waveform. As a result the method and system provide for oversampling a waveform with a variable, dynamically selectable oversampling factor.

Method and system for oversampling a waveform with variable oversampling factor

A method of determining a position of at least one transceiver node comprises, anchor node by anchor node, transmitting respective positioning frames suitable for reception by a transceiver node and by the other anchor nodes. The transceiver node receives the positioning frames transmitted by the anchor nodes and ascertains respective times of reception for each. A solver stage determines the coordinates (x, y, z) of the respective transceiver node and the time tof transmission of the first positioning frame by an anchor node of first rank in the positioning sequence by numerically solving a non-linear system of at least five equations.

Precise positioning using time of arrival with pseudo-synchronized anchor nodes

A CORDIC unit for the iterative approximation of a vector rotation through a rotary angle &#x3b8; by a number of elementary rotations through elementary angles &#x3b1;, including elementary rotation stages for respectively affecting an elementary rotation through an elementary angle &#x3b1;as an iteration step in the iterative approximation. After such an elementary rotation there remains a residual angle through which rotation is still to be affected. The elementary rotation stages of the CORDIC unit are adapted for rotation through elementary angles &#x3b1;given by powers of two with a negative integral exponent. The CORDIC unit can also include a triggering device for triggering the elementary rotations, a triggering device which is adapted prior to each iteration step to compare the residual angle to at least one of the elementary angles and to omit those elementary rotation stages whose elementary angles are greater than the residual angle.

CORDIC unit

The IEEE 802.11a standard uses OFDM, where the transmission is divided into several orthogonal sub-carriers. Here, an algorithm is used for the frame detection; a simplified differentiator obtains an absolute maximum in the differentiated signal at that point where the first plateau in J(k) starts; a peak detector obtains the position of the absolute maximum in the differentiated signal, divides the problem into relative peak detection and falling edge detection; a simplified XNOR-based crosscorrelator is used, where the simplifications are based on the knowledge of the reference; a particular solution is provided for the CORDIC algorithm in the vectoring mode for arctangent calculation; hardware structuring is presented for the whole synchronizer so as to obtain a simple control mechanism and the separation of this structure into different clock domains, each one being activated only to perform its operation and deactivated afterwards.

Method and device for frame detection and synchronizer

The invention concerns an asynchronous wrapper for a globally asynchronous, locally synchronous circuit. The asynchronous wrapper operates with a request signal-driven clock control, supplemented by a local clock unit in the absence of request signals. It has at least one input unit which is adapted to receive a request signal from outside and to indicate to the outside the reception of the request signal by the delivery of an associated acknowledgement signal, and a pausable clock unit which is adapted to repeatedly produce a first clock signal and to deliver it to an internally synchronous circuit block associated with the asynchronous wrapper. The input unit is adapted to produce, if a request signal is applied, a second clock signal which is in a defined time relationship with the request signal and to deliver it to the internally synchronous circuit block. There is further provided a time-out unit which is connected to the input unit and which is adapted to start the delivery of the first clock signal when external request signals are absent over a given period of time.

Asynchronous wrapper for a globally asynchronous, locally synchronous (GALS) circuit

Growing community of inventors

Berlin, Germany

Eckhard Grass