Symmetrical multi-path method for determining the distance between two transmitter-receivers
First Claim
1. Method for determining the spatial distance between two transmitter-receivers within a distance range in the order of magnitude of 10 km,in which both transmitter-receivers set off respectively at least one signal round, a signal round comprising the following steps:
- transmitting at least one request data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, from a first transmitter-receiver setting off the signal round to a second transmitter-receiver at a request transmitting time (TTA1, TTB2),receiving the request data frame at the second transmitter-receiver at a request receiving time (TRB1, TRA2),transmitting a reply data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, from the second transmitter-receiver to the first transmitter-receiver at a reply transmitting time (TTB1, TTA2), which has a respective reply time interval (TreplyB1, TreplyA2) from the request receiving time (TRB1, TRA2), and detecting the respective reply time interval,receiving the reply data frame at the first transmitter-receiver setting off the signal round and detecting a reply receiving time (TRA1, TRB2), allocated to the receipt of the reply data frame, relative to the request transmitting time (TTA1, TTB2),at which an evaluation is carried out comprising the following steps;
ascertaining a round time interval (TroundA1, TroundB2) between the respective request transmitting time (TTA1, TTB2) and the respective reply receiving time (TRA1, TRB2) for each signal round, this step being able to be performed at any time after the relevant signal round,ascertaining a signal transit time (Tprop) between the two transmitter-receivers using the ascertained round time intervals (TroundA1, TroundB2) and the reply time intervals (TreplyB1, TreplyA2) andascertaining the spatial distance between the first and second transmitter-receivers by multiplying the signal transit time (Tprop) (by a previously known propagation speed of the signal pulses,and in which the signal rounds are performed in such a way that the reply time intervals (TreplyA2, TreplyB1) are either identical or have a difference, in the case of performing more than one signal round set off by each transmitter-receiver an average difference, the amount of which is a maximum of 200 microseconds.
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Abstract
The invention relates to a symmetrical multi-path method for determining the spatial distance between two transmitter-receivers. Both transmitter-receivers set off at least one signal round in each case. A signal round comprises the steps:
- a) transmitting at least one request data frame of a first transmitter-receiver to a second transmitter-receiver at a request transmitting time (TTA1, TTB2),
- b) receiving the request data frame at the second transmitter-receiver at a request receiving time (TRB1, TRA2),
- c) transmitting a reply data frame from the second transmitter-receiver to the first transmitter-receiver at a reply transmitting time (TTB1, TTA2), which has a respective reply time interval (TreplyB1, TreplyA2) from the request receiving time (TRB1, TRA2) and detecting the reply time interval,
- d) receiving the reply data frame at the first transmitter-receiver setting off the signal round and detecting an allocated reply receiving time (TRA1, TRB2).
The signal rounds are performed in such a way that the reply time intervals (TreplyA2, TreplyB1) are either identical or have a difference, in the case of performing more than one signal round set off by each transmitter-receiver an average difference, the amount of which is a maximum of 200 microseconds.
71 Citations
68 Claims
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1. Method for determining the spatial distance between two transmitter-receivers within a distance range in the order of magnitude of 10 km,
in which both transmitter-receivers set off respectively at least one signal round, a signal round comprising the following steps: -
transmitting at least one request data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, from a first transmitter-receiver setting off the signal round to a second transmitter-receiver at a request transmitting time (TTA1, TTB2), receiving the request data frame at the second transmitter-receiver at a request receiving time (TRB1, TRA2), transmitting a reply data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, from the second transmitter-receiver to the first transmitter-receiver at a reply transmitting time (TTB1, TTA2), which has a respective reply time interval (TreplyB1, TreplyA2) from the request receiving time (TRB1, TRA2), and detecting the respective reply time interval, receiving the reply data frame at the first transmitter-receiver setting off the signal round and detecting a reply receiving time (TRA1, TRB2), allocated to the receipt of the reply data frame, relative to the request transmitting time (TTA1, TTB2), at which an evaluation is carried out comprising the following steps; ascertaining a round time interval (TroundA1, TroundB2) between the respective request transmitting time (TTA1, TTB2) and the respective reply receiving time (TRA1, TRB2) for each signal round, this step being able to be performed at any time after the relevant signal round, ascertaining a signal transit time (Tprop) between the two transmitter-receivers using the ascertained round time intervals (TroundA1, TroundB2) and the reply time intervals (TreplyB1, TreplyA2) and ascertaining the spatial distance between the first and second transmitter-receivers by multiplying the signal transit time (Tprop) (by a previously known propagation speed of the signal pulses, and in which the signal rounds are performed in such a way that the reply time intervals (TreplyA2, TreplyB1) are either identical or have a difference, in the case of performing more than one signal round set off by each transmitter-receiver an average difference, the amount of which is a maximum of 200 microseconds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. Transmitter-receiver for determining the spatial distance from a second transmitter-receiver within a distance range in the order of magnitude of 10 km comprising:
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a transmitting unit, configured to set off at least one first signal round by transmitting a respective first request data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, at a first request transmitting time (TTA1, TTB2) to a second transmitter-receiver, a receiving unit configured to monitor the receipt of a first reply data frame sent in reply to the first request data frame from the second transmitter-receiver and to ascertain a first reply receiving time (TRA1) relative to the first request transmitting time (TTA1,) allocated to the receipt of the first reply data frame, the transmitting unit being additionally configured, after receipt of a second request data frame from the second transmitter-receiver setting off a second signal round, to transmit a second reply data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, with a reply time interval (TreplyA2) of an allocated second request receiving time (TRA2) of the second request data frame to the second transmitter-receiver, after receipt of a first request data frame from a second transmitter-receiver setting off a first signal round, to transmit a first reply data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, with a reply time interval (TreplyB1) relative to an allocated first request receiving time (TRB1) of the first request data frame to the second transmitter-receiver and on receipt of the first request data frame from the second transmitter-receiver to set off a second signal round by transmitting a second request data frame, containing a sequence of at least two signal pulses with a predetermined pulse time interval, to the second transmitter-receiver at a second request transmitting time (TTB1), the receiving unit additionally being configured, to monitor the receipt of a second reply data frame sent from the second transmitter-receiver in reply to the second request data frame and to ascertain a second reply receiving time (TRB2) relative to the second request transmitting time (TTB2) allocated to the receipt of the second reply data frame, and the transmitter-receiver being configured to transmit the first and the second reply data frames with a predetermined value of the reply time interval relative to the respective request receiving time with a chronological precision, at which the reply time intervals (TreplyA2, TreplyB1) on the part of the first and second transmitter-receivers in the signal rounds are either identical or have a difference, in the case of performing more than one signal round set off by each transmitter-receiver an average difference, the amount of which is a maximum of 200 microseconds. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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Specification