Verfahren und Vorrichtung zur Signalerfassung eines Verallgemeinerten Boc-Modulierten Signals

Details

Veröffentlichungs-Nr.

EP3454090

Aktenzeichen

EP17189747

Anmeldetag

7. September 2017

Veröffentlichung

4. November 2020

Erteilung

4. November 2020

Rechtsraum

EP

IPC

G01S19/30

Abstract

The present invention provides a method for signal acquisition of a Generalized Binary Offset Carrier, G-BOC, modulated signal comprising K elementary BOC(M k ,N k )-modulated signals. The method comprises retrieving for each of the K elementary BOC(M k ,N k )-modulated signals a lower sideband signal and an upper sideband signal by respectively up-converting and down-converting the respective elementary BOC(M k ,N k )-modulated signal under use of a sub-carrier frequency f sc,k corresponding to the respective elementary BOC(M k ,N k )-modulated signal and by respectively lowpass filtering the up-converted and down-converted respective elementary BOC(M k ,N k )-modulated signal. The method comprises respectively correlating a replica modulated with the primitive pulse shape involved in the generation of the BOC(M k ,N k )-modulated signal such as binary phase shift keying, BPSK, pulse shape with the retrieved lower and upper sideband signals. The replica has a chip rate, for example f c,k =N k ×f 0 , and a spreading sequence according to the respective elementary BOC(M k ,N k )-modulated signal. The chip rate can be expressed as chips per second, abbreviated Cps. The spreading sequence can be a binary noise like sequence. The replica is generated on the basis of a code delay hypothesis and a Doppler frequency hypothesis. The method comprises multiplying the respective correlation results by complex or complex conjugate multiplication. The method further comprises generating a first detector output by adding the corresponding K complex or K complex conjugate multiplications and/or generating a second detector output by adding N NC successive detector outputs, each being the sum of the K complex or K complex conjugate multiplications. The method comprises acquiring the G-BOC-modulated signal corresponding to the code delay hypothesis and Doppler frequency hypothesis, when the first and/or second detector output being compared to a detection threshold indicates detection. Further, the present invention provides a device for signal acquisition of a Generalized Binary Offset Carrier, G-BOC, modulated signal comprising K elementary BOC(M k ,N k )-modulated signals.

Anmelder

Firma

Airbus Defence and Space GmbH

Land

🇩🇪 Deutschland

Fachgebiete