Device for receiving signals which have carrier frequencies and codes

摘要

The device for receiving signals which have carrier frequencies and codes, said signals being navigation or communication signals, has multiple individual antennas (114) for receiving a signal, each individual antenna (114) having an antenna output (116) at which the received signal is present. Furthermore, the device is provided with an analog preprocessing unit (122) for preprocessing the signals received by the individual antennas (114), said preprocessing unit (122) having signal transmitting and signal preprocessing channels (124) which are assigned to the individual antennas (114), and the device is provided with a digital signal processor (134). The device additionally has a calibration signal generating unit (148) for generating a calibration signal which, like the signals received by the individual antennas (114), has a carrier frequency and a code and which is used for calibrating the propagation time and the phase of the signal transmission paths. Additionally, a reference frequency generating unit (150) is also provided that generates a reference frequency with which the analog preprocessing unit (122), the digital signal processor (134), and/or the calibration signal generating unit (148) can be operated and/or on the basis of which other operating frequencies with a specifiable relationship to the reference frequency can be generated in order to operate the analog preprocessing unit (122), the digital signal processor (134), and/or the calibration signal generating unit (148).

主权项

1. A device for receiving signals having carrier frequencies and codes, said signals being navigation or communication signals, comprising
a plurality of individual antennas for receiving a signal, each individual antenna having an antenna output at which the received signal is present, an analog preprocessing unit for preprocessing the signals received by the individual antennas, said analog preprocessing unit being connected to the antenna outputs of the individual antennas and including signal transmitting and signal preprocessing channels assigned to the individual antennas, each of said signal preprocessing channels having a signal input and a signal output, a digital signal processor connected, via signal inputs, to the signal outputs of the signal transmitting and signal preprocessing channels of the preprocessing unit, for further processing of the preprocessed signals for the purpose of code acquisition and of tracking the carrier frequencies and codes of the received signals by estimation of the carrier and code frequencies and of their phases in the digital signal processor, a calibration signal generating unit for generating a calibration signal which, like the signals received by the individual antennas, has a carrier frequency and a code and which, for calibration of the phase and of the propagation time of the signal transmission paths between the antenna outputs of the individual antennas and the signal inputs of the digital signal processor, can be superimposed on the received signals present on the antenna outputs of the individual antennas, wherein a code acquisition for the calibration signal is performed in the digital signal processor, and a reference frequency generating unit generating a reference frequency with which the analog preprocessing unit, the digital signal processor, and/or the calibration signal generating unit can be operated and/or on the basis of which other operating frequencies with a specifiable relationship to the reference frequency can be generated in order to operate the analog preprocessing unit, the digital signal processor, and/or the calibration signal generating unit, wherein the digital signal processor is adapted to have supplied to it a digital signal having the carrier frequency of the calibration signal or having another frequency with a specifiable relationship to the carrier frequency of the calibration signal and that said digital signal can be used in the digital signal processor for carrier frequency tracking of the calibration signal as a substitute for the carrier frequency and carrier phase estimation.