Method and arrangement for measuring the signal delay between a transmitter and a receiver
OwnerRoland Gierlich, Jörg Hüttner +1inventors
InventorsRoland Gierlich, Jörg Hüttner, Andreas Ziroff
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Abstract
A method for determining a delay τ of a signal between a UWB transmit unit and a FSCW receiver unit includes: generating a pulsed transmit signal Str by the transmit unit and emitting the pulsed transmit signal Str, the transmit signal Str comprising a broadband spectrum SPEKtr having a plurality of lines w; receiving the emitted signal Str by the receiver unit as a received signal Srx, wherein the received signal Srx comprises a broadband spectrum SPEKrx having a plurality of lines m; determining at the receiver unit a channel impulse response hn of the received signal Srx; and determining the signal delay τ based on the channel impulse response hn.
Claims12
A method for determining a delay τ of a signal between a UWB transmit unit and a FSCW receiver unit, comprising:
- in a first step, generating a pulsed transmit signal Str by the transmit unit and emitting the pulsed transmit signal Str, the transmit signal Str comprising a broadband spectrum SPEKtr having a plurality of lines w;
- in a second step, receiving the emitted signal Str by the receiver unit as a received signal Srx, wherein the received signal Srx comprises a broadband spectrum SPEKrx having a plurality of lines m;
- in a third step, determining at the receiver unit a channel impulse response hn of the received signal Srx;
- in a fourth step, determining the signal delay τ based on the channel impulse response hn.
A distance measuring arrangement for measuring a signal delay τ between a transmit unit and a receiver unit,
- wherein the transmit unit comprises an ultra wideband transmitter configured to transmit a pulsed transmit signal Str, wherein the transmit signal Str comprises a broadband spectrum SPEKtr having a plurality of lines w;
- and
- the receiver unit comprises:
- a FSCW receiver for receiving the transmitted transmit signal Str as a received signal Srx, wherein the received signal Srx includes a broadband spectrum SPEKrx having a plurality of lines m;
- and
- an evaluation unit configured to determine a channel impulse response hn τ based on the received signal Srx and to determine the signal delay τ based on the channel impulse response hn.
The distance measuring arrangement of 7, wherein the receiver unit further comprises a filter, to which the base band signal is fed, and in which a narrow band partial spectrum TSPEKrx(k) can be selected from the spectrum of the base band signal, whereby instead of the output signal of the mixer, the output signal of the filter is used to determine the channel impulse response hn and the signal delay τ in the evaluation unit.
The distance measuring arrangement of claim 12, wherein the frequency fLO=fLO(k) of the reference signal SLO(k) is gradually changed for the individual partial steps k.
Dependencies are inferred from the claim text.