Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna pattern plotting
Reexamination Certificate
2008-08-21
2010-12-07
Phan, Dao L (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna pattern plotting
C342S373000
Reexamination Certificate
active
07847731
ABSTRACT:
The present invention relates to a method for the operation of an antenna group (1) having M≧2 transmitters and N≧2 receivers (3) for the digital beamforming. In the method, a coherent transmit signal is transmitted in a transmit-receive-cycle via each of the M transmitters (2) into an area to be monitored, and a coherent receive signal from the area is recorded by each of the N receivers (3) for each transmit signal so that M·N receive signals are obtained. To each receive signal, a combination of the respective transmitting transmitter (2) and the respective receiving receiver (3) is allocated. The M·N receive signals are processed by means of digital beamforming to obtain spatial information about objects in the area to be monitored. In the method, each of the M·N receive signals is multiplied during processing by an amplitude factor which is individually allocated to the respective combination of transmitter (2) and receiver (3), wherein the amplitude factors are selected such that an increase of the signal dynamic range at the digital beamforming is achieved. The method and the apparatus formed for the execution of the method allow a high angle resolution and, at the same time, a high signal dynamic range.
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patent: 2007 199085 (2007-09-01), None
K. Schuler, M. Younis, R. Lenz and W. Wiesbeck describe in “Array Design for Automotive Digital Beamforming Radar System”, Radar Conference, 2005 IEEE International, May 9-12, 2005, pp. 435-440.
A.T. Villeneuve, “Taylor Patterns for Discrete Arrays”, IEEE Transactions on Antennas and Propagation, vol. AP-32, No. 10, Oct. 1984, pp. 1089 to 1093.
Schuler Karin
Wiesbeck Werner
Phan Dao L
Renner Kenner Greive Bobak Taylor & Weber
Universitat Karlsruhe
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