Abstract:We present the implementation of a cooperative radar system on a gantry rail crane for distance measurements in an industrial environment. The measurement approach is based on the dual-ramp frequency-modulated continuous-wave principle, using identical sensor-nodes at the endpoints of the range of interest. Pseudo-range information is exchanged via a dedicated data-link between these stations. At the sensor-node a flexible high-performance signal processing and remote management engine is implemented. The syst… Show more
“…The received signal at each station is down-converted with a copy of the local transmit (TX) signal from the other station. The range information then can be calculated from the combined information of the participating sensor nodes, thus presuming a data-link [6]. Fig.…”
Section: Measurement and Communication Principlesmentioning
confidence: 99%
“…Constant phase-terms have been summarized by , and φ 0,R . The frequency f R is the relevant signal component for the ranging system [6] with …”
Section: Measurement and Communication Principlesmentioning
confidence: 99%
“…A fact that also should be taken care of is the possibility of different chirp rates caused by independent crystal oscillators for the generation of the ramp as well as the communication signal. Even if the difference is in the region of some ppm, which is typical for industrial crystal oscillators, the difference can cause a drift of the carrier frequency during the chirp of the order of several 10 kHz as it could be shown in [6]. The bandwidth of the BPF is therefore slightly extended to cover this drift.…”
We present the realization of a cooperative radar system for ranging applications with integrated data-transmission capability. The simultaneous transmission is performed by the radar-hardware without the necessity of additional components or an auxiliary data-link. Therefore, the data are directly embedded in the transmitted chirp of a frequency-modulated continuouswave radar sensor. A second station, acting as receiver, uses an identical, but unmodulated chirp for down-conversion. The resulting signal then is processed by a non-coherent demodulator setup, extracting the communication data. Measurement results from transmission of messages with different bit-rates are shown. By utilizing existing radar-hardware a transmission rate of up to 256 kbps is possible, without the need of a dedicated transceiver. Additionally, a method to optimize the ranging results by variable distribution of the available signal power between distance-measurement and communication system is presented.
“…The received signal at each station is down-converted with a copy of the local transmit (TX) signal from the other station. The range information then can be calculated from the combined information of the participating sensor nodes, thus presuming a data-link [6]. Fig.…”
Section: Measurement and Communication Principlesmentioning
confidence: 99%
“…Constant phase-terms have been summarized by , and φ 0,R . The frequency f R is the relevant signal component for the ranging system [6] with …”
Section: Measurement and Communication Principlesmentioning
confidence: 99%
“…A fact that also should be taken care of is the possibility of different chirp rates caused by independent crystal oscillators for the generation of the ramp as well as the communication signal. Even if the difference is in the region of some ppm, which is typical for industrial crystal oscillators, the difference can cause a drift of the carrier frequency during the chirp of the order of several 10 kHz as it could be shown in [6]. The bandwidth of the BPF is therefore slightly extended to cover this drift.…”
We present the realization of a cooperative radar system for ranging applications with integrated data-transmission capability. The simultaneous transmission is performed by the radar-hardware without the necessity of additional components or an auxiliary data-link. Therefore, the data are directly embedded in the transmitted chirp of a frequency-modulated continuouswave radar sensor. A second station, acting as receiver, uses an identical, but unmodulated chirp for down-conversion. The resulting signal then is processed by a non-coherent demodulator setup, extracting the communication data. Measurement results from transmission of messages with different bit-rates are shown. By utilizing existing radar-hardware a transmission rate of up to 256 kbps is possible, without the need of a dedicated transceiver. Additionally, a method to optimize the ranging results by variable distribution of the available signal power between distance-measurement and communication system is presented.
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