Abstract: According to the invention, a data stream with continuous, periodic transmitted, spread data signals of N chips each is split into two data streams of N chips each, which are shifted by N chips; for each of these data streams the correlation functions are calculated within every chip clock time and, in relation to their maxima, evaluated in order to separate user signals from extraneous signals and disturbing signals.

Abstract: According to the invention, a data stream with continuous, periodic transmitted, spread data signals of N chips each is split into two data streams of N chips each, which are shifted by N chips; for each of these data streams the correlation functions are calculated within every chip clock time and, in relation to their maxima, evaluated in order to separate user signals from extraneous signals and disturbing signals.

Abstract: According to the invention, a data stream with continuous, periodic transmitted, spread data signals of N chips each is split into two data streams of N chips each, which are shifted by N chips; for each of these data streams the correlation functions are calculated within every chip clock time and, in relation to their maxima, evaluated in order to separate user signals from extraneous signals and disturbing signals.

Abstract: The invention comprises a method for de-spreading of a data signal spread with a spread spectrum sequence. The invention is especially suited for the improvement of correlations of spread data signals after transmission. Therefor it can be integrated as software or hardware module into existing transmission systems.

Abstract: In order to attain an optimally compressed, narrow pulse peak at the filter output of a correlation filter for the purpose of reception, the interfering secondary maxima of the autocorrelation function of binary codes must be as small as possible. The invention uses specially designed signal codes which are used to generate the associated complementary signal code from the received sequence by means of evaluation in the reception filter. The subsequent parallel formation of the autocorrelation functions of the received signal code and the complementary signal code exhibits secondary maxima having an opposite mathematical sign, thus resulting in the desired prefect pulse peak having secondary maxima which are equal to zero during summation at the filter output.

Abstract: The invention comprises a method for de-spreading of a data signal spread with a spread spectrum sequence. The invention is especially suited for the improvement of correlations of spread data signals after transmission. Therefor it can be integrated as software or hardware module into existing transmission systems.

Abstract: In order to attain an optimally compressed, narrow pulse peak at the filter output of a correlation filter for the purpose of reception, the interfering secondary maxima of the autocorrelation function of binary codes must be as small as possible. The invention uses specially designed signal codes which are used to generate the associated complementary signal code from the received sequence by means of evaluation in the reception filter. The subsequent parallel formation of the autocorrelation functions of the received signal code and the complementary signal code exhibits secondary maxima having an opposite mathematical sign, thus resulting in the desired prefect pulse peak having secondary maxima which are equal to zero during summation at the filter output.

Abstract: The present invention provides a system for automatically controlling the distance between vehicles following each other on the same drive track which includes in each vehicle a drive device, brake device, distance sensing device, vehicle speed measuring device, and control device. Paralleling the drive track are a neutral rail and a control rail. The drive device drives the vehicle. The brake device brakes the vehicle. The distance sensing device generates a distance variable. The vehicle speed measuring device measures a speed of the vehicle, and generates speed signals based thereon. The control device controls the drive device to drive the vehicle at a speed based on a speed control variable. The control device generates the speed control variable based on the distance variable. The speed control variable is less than the distance variable.