Method for operating a surroundings-detection system of a vehicle
First Claim
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1. A method for operating a surroundings-detection system of a vehicle including a transceiver unit, the method comprising:
- emitting, by the transceiver unit, a frequency-modulated signal;
receiving, by the transceiver unit, echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes a pulse having both at least one section having increasing frequencies and at least one section having decreasing frequencies, and wherein the received echo signals are associated with at least one reflection source;
passing the received echo signals through at least one first finite impulse response (FIR) filter device having a first FIR signal, and through at least one second FIR filter device having a second FIR signal;
ascertaining one first point in time of best correlation of the received echo signals with the first FIR signal and a second point in time of best correlation of the received echo signals with the second FIR signal; and
ascertaining information about the speed of the at least one reflection source relative to the transceiver unit on the basis of a time difference between the ascertained first and second points in time of best correlation.
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Abstract
A method for operating a surroundings-detection system of a vehicle includes at least one transceiver unit emitting a frequency-modulated signal and receiving echo signals of the emitted frequency-modulated signal. The received echo signals are associated with reflection sources, and a piece of information about the speed of the reflection source relative to the transceiver unit is ascertained on the basis of the received echo signals.
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Citations
21 Claims
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1. A method for operating a surroundings-detection system of a vehicle including a transceiver unit, the method comprising:
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emitting, by the transceiver unit, a frequency-modulated signal; receiving, by the transceiver unit, echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes a pulse having both at least one section having increasing frequencies and at least one section having decreasing frequencies, and wherein the received echo signals are associated with at least one reflection source; passing the received echo signals through at least one first finite impulse response (FIR) filter device having a first FIR signal, and through at least one second FIR filter device having a second FIR signal; ascertaining one first point in time of best correlation of the received echo signals with the first FIR signal and a second point in time of best correlation of the received echo signals with the second FIR signal; and ascertaining information about the speed of the at least one reflection source relative to the transceiver unit on the basis of a time difference between the ascertained first and second points in time of best correlation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-transitory, machine-readable storage medium including program instructions, which when executed by a processor perform a method for operating a surroundings-detection system of a vehicle including a transceiver unit, the method comprising:
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emitting, by the transceiver unit, a frequency-modulated signal; receiving, by the transceiver unit, echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes a pulse having both at least one section having increasing frequencies and at least one section having decreasing frequencies, and wherein the received echo signals are associated with at least one reflection source; passing the received echo signals through at least one first finite impulse response (FIR) filter device having a first FIR signal, and through at least one second FIR filter device having a second FIR signal; ascertaining one first point in time of best correlation of the received echo signals with the first FIR signal and a second point in time of best correlation of the received echo signals with the second FIR signal; and ascertaining information about the speed of the at least one reflection source relative to the transceiver unit on the basis of a time difference between the ascertained first and second points in time of best correlation. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A surroundings-detection system of a vehicle, comprising:
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a transceiver unit configured to emit a frequency-modulated signal and receive echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes a pulse having both at least one section having increasing frequencies and at least one section having decreasing frequencies; and a filtering and ascertaining device coupled to the at least one transceiver unit and configured to; pass the received echo signals through at least one first finite impulse response (FIR) filter device having a first FIR signal, and through at least one second FIR filter device having a second FIR signal; ascertain one first point in time of best correlation of the received echo signals with the first FIR signal and a second point in time of best correlation of the received echo signals with the second FIR signal; and ascertain information about the speed of the at least one reflection source relative to the transceiver unit on the basis of a time difference between the ascertained first and second points in time of best correlation. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification