Siemens Aktiengesellschaft

S.m.s. Smart Microwave Sensors Gmbh

Volkswagen Ag

Other

Eads Deutschland Gmbh

Nokia Siemens Networks Gmbh & Co Kg

Siemens Aktiengesellschsft

Automotive Distance Control Systems Gmbh

Telefunken Systemtechnik Ag

Hermann Rohling

Egon Schulz

Dirk Galda

Elena Costa

Harald Haas

Ralph Mende

Niclas Meier

Marc-Michael Meinecke

Matthias Lott

Ernst Lissel

Hui Li

Wolfgang Zirwas

Martin Weckerle

Edgar Bolinth

Ruediger Halfmann

Rüdiger Halfmann

Josef Martin Eichinger

Ralf Kern

Dieter Nagel

Tobias Giebel

Manfred Minker

Mattias Lampe

Ralf Mende

Wilfried Plagge

Hans Hommel

Wilhelm Guener

Alexander Vanaev

The present invention relates to a method for determining distance (R) and radial velocity (v) of an object in relation to a measurement location, in which method radar signals are emitted and after reflection on the object are received again at the measurement location, wherein the emitted radar signals are subdivided within a measuring cycle into numerous segments () in which the frequency of the radar signals is gradually changed from an initial value (f, f) to the end value and each received reflected signal is subjected across one segment () to a first evaluation to detect frequency peaks and additionally a subsequent second evaluation of the signals for the frequency peaks of all segments () of the measuring cycle is carried out to determine a Doppler frequency component as a measure of the radial velocity (v). According to said method, an ambiguity in the determination of the relative velocity (v) is eliminated by subdividing the segments () into at least two groups (A, B), the initial value (f, f) of which and/or end value of the changing frequency are different, by subjecting the segments () of each group (A, B) separately to the second evaluation and by determining a phase difference of the signals occurring during the second evaluation of the segments () of each group (A, B) and corresponding to each other, thereby removing ambiguities in the determined velocity.

Method and device for determining distance and radial velocity of an object by means of radar signal

OFDM symbols are generated using data from one or more users or from one or more data sources represented on a number of sub-carriers. To inhibit multiple-access interference on application of the CDMA principle, the data are transformed in a data-source specific manner and only subsequently allocated to the sub-carriers, independently of the transformation.

Method and communication system device for the generation or processing of OFDM symbols in a transmission system with spread user data

A method and a corresponding transmitting device to encode data with a differential space-time block code. A code matrix is calculated recursively from a momentary data matrix with a previous code matrix as a DSTBC block with symbols that are to be transmitted, the data matrix is formed from at least two data symbols that are to be transmitted, and the amplitude is modulated. Amplitude modulation data is encoded into an amplitude difference of at least two data symbols within each individual DSTBC block.

Method and transmitting device for encoding data in a differential space-time block code

Data is transmitted via time division multiple access methods and every radio cell includes one base station each for the radio coverage of a plurality of mobile stations assigned to the radio cell. The base station receives, in addition to mobile station signals of its own radio cell, mobile station signals of neighboring radio cells and determines, on the basis of the mobile station signals received, a time synchronization value and/or a frequency synchronization value to which the base station synchronizes itself.

Method for synchronizing radio communication system divided into radio cells

Method for synchronizing a radio communication system divided into radio cells

In a method for the error-monitored transmission of data via interfaces of a multi-step communication system, the data is transmitted from a transmitter station to a data-receiving station via at least two relay stations which are connected therebetween and receive and further transmit the data parallel to each other. The data is retransmitted if the transmission has been insufficient due to a request from the receiver end and/or due to the lack of a confirmation from the receiver end. In order to increase performance while reducing power consumption of the system, the request or confirmation is generated only by the receiver station and is sent back to the transmitter station. The relay stations consequently do not generate any confirmations or requests.

Method and communication station for transmitting data

A method performs synchronization in an at least partly self-organizing radio communication system with a number of mobile stations which lie across an air interface within two-way radio range. At least some mobile stations from the number of mobile stations transmit synchronization sequences, by which a part or all the mobile stations of the number of mobile stations synchronize.

Method for decentralized synchronization in a self-organizing radio communication system

A method and OFDM receiver are provided for reducing the influence of harmonic interference on OFDM transmission systems, wherein high interference unity is achieved by the simultaneous use of a window function and a determined item of reliability information, the window function being a Nyquist-shaped window function which generates low side lobes in the subcarrier and interference spectra while simultaneously leaving the orthogonality of the subcarriers unchanged, the determined item of reliability information being derived from a measurement when transmitting a so-called zero symbol, in order to detect the instantaneously active interference signals, with the high interference immunity being achieved when the subcarrier-specific information is taken into account in a so-called Viterbi decoder.

Method and orthogonal frequency division multiplexing (OFDM) receiver for reducing the influence of harmonic interference on OFDM transmission systems

A method synchronizes a radio communication system divided into radio cells. Data is transmitted in the radio communication system by a multiple access method. Each radio cell thus has a base station for the radio feed of several mobile stations, allocated to the radio cell. A synchronization of the base station is carried out using the received signals from mobile stations in the same radio cell and also in adjacent radio cells. The base station determines at least one pilot signal and signals said pilot signal to the allocated mobile stations in a downwards direction. The allocated mobile stations transmit the signaled pilot signal in an upwards direction to the base station. The base station determines a synchronization value, from the received pilot signals from the radio cell thereof and also from the adjacent radio cells, fro a time synchronization and/or for a frequency synchronization on which the bas station is synchronized.

Method for synchronizing a radio communication system divided into radio cells, a base station and mobile station in such a system

A method and arrangement for controlling a system of multiple traffic signals for regulating the traffic of vehicles is described. Traffic data is transmitted by wireless transmission to traffic data processing units assigned individually to a locally limited group of traffic signals, and each traffic data processing unit performs an analysis of the local traffic situation for the environment of the locally limited group of traffic signals up to, at the maximum, the neighboring locally limited groups of traffic signals.

Method and arrangement for controlling a system of multiple traffic signals

The distance and relative speed of an object remote from an observation point determined using a signal form which includes two signals having a predetermined spacing relative to each other. The two signals are transmitted for a certain time interval during which the frequency of the signals is modulated in a stepwise fashion. Additionally, the signal sections of the two signals are transmitted alternately for each step so that there is a predetermined frequency spacing between the signal sections being emitted consecutively.

Method and device for determining separation and relative speed of a distant object

Method for HPRF-radar measurement

The invention relates to a distance measuring device. A transmitting part (E) for electromagnetic radiation especially radar radiation, emits measuring pulses (A, B) which are controlled by a pulse generator ( ), and a receiving part ( ) is switched to a ready-to-receive mode after a certain, adjustable delay (T , before a next measuring pulse is emitted, for receiving a reflected pulse during a time gate ( ). The aim of the invention is to provide a calibration process taking into account all practical defects. To this end, the pulse generator ( ) produces pulses with a multiple of the frequency with which the measuring pulses are repeated and a calibrating cycle in which calibrating pulses (&tgr; to &tgr; ) are produced with pulses generated by the pulse generator ( ), controlled by the transmitting part ( ), is carried out at longer intervals in time. The calibrating pulses (&tgr; to &tgr; ) are received directly in the receiving part ( ) and the delay time (T ) In the receiving part is regulated in such a way that a generated calibrating pulse (&tgr; ) to &tgr; ) is received directly by the received directly by the receiving part ( ) during a time gate ( ).

Distance measuring device and method for calibrating a distance measuring device

Growing community of inventors

Wolfenbüttel, Germany

Hermann Rohling