Patents by Inventor Berthold Lankl

Berthold Lankl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4800572
    Abstract: An adaptive frequency range equalizer for digital radio relay systems which require adaptive frequency range equalizers which have coefficients that are adjustable. That are different possibilities for setting the coefficients of the transversal filter in such equalizers in a manner such that the transmission function of the transversal filter is either of the minimum phase type (mp), or the linear phase type (lp) or the non-minimum phase type (mnp). The invention discloses a method and apparatus for obtaining either of the three transmission functions for the transversal filter.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: January 24, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Josef A. Nossek, Georg Sebald, Berthold Lankl, Klaus Boshold
  • Patent number: 4757319
    Abstract: An adaptive depolarization-interference-compensator for a digital radio relay system using multi-level quadrature amplitude modulation (QAM) with co-channel operation of the orthogonally polarized signals which is not necessarily synchronous with the clock frequency and/or carrier frequency and produces good compensation of depolarization effects.The receiving branch of the two receivers (3, 4), which use the same RF-local oscillator (5) or separate RF-local oscillators are synchronized for the differently polarized signals and each contain a quadrature demodulator (8, 14) for two signal components (I- and Q-channel).
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: July 12, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventor: Berthold Lankl
  • Patent number: 4745623
    Abstract: An adaptive transverse equalizer formed of delay elements, control elements and summers, and which is constructed in accordance with a serial-in/parallel-out or parallel-in/serial-out concept. Such an equalizer should be improved such that, given a simple structure, it exhibits a high equalizing performance and is particularly suitable for multi-stage digital radio link systems. For this purpose, an equalizer is provided as a linear transverse equalizer and having (n-1) positive and m negative coefficients set in accordance with a zero-forcing algorithm. A linear transverse filter is provided which supplies at least one additional, positive coefficient following upon an access region of the linear transverse filter and whose loop transit time corresponds to n-times or (n+i) times a symbol period.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: May 17, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventors: Georg Sebald, Berthold Lankl, Josef A. Nossek