Time-of-flight radio location system
- Livermore, CA
A bi-static radar configuration measures the direct time-of-flight of a transmitted RF pulse and is capable of measuring this time-of-flight with a jitter on the order of about one pico-second, or about 0.01 inch of free space distance for an electromagnetic pulse over a range of about one to ten feet. A transmitter transmits a sequence of electromagnetic pulses in response to a transmit timing signal, and a receiver samples the sequence of electromagnetic pulses with controlled timing in response to a receive timing signal, and generates a sample signal in response to the samples. A timing circuit supplies the transmit timing signal to the transmitter and supplies the receive timing signal to the receiver. The receive timing signal causes the receiver to sample the sequence of electromagnetic pulses such that the time between transmission of pulses in the sequence and sampling by the receiver sweeps over a range of delays. The receive timing signal sweeps over the range of delays in a sweep cycle such that pulses in the sequence are sampled at the pulse repetition rate, and with different delays in the range of delays to produce a sample signal representing magnitude of a received pulse in equivalent time. Automatic gain control circuitry in the receiver controls the magnitude of the equivalent time sample signal. A signal processor analyzes the sample signal to indicate the time-of-flight of the electromagnetic pulses in the sequence.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 5510800
- OSTI ID:
- 870388
- Country of Publication:
- United States
- Language:
- English
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Time-of-flight radio location system
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radio
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bi-static
radar
configuration
measures
direct
transmitted
rf
pulse
capable
measuring
jitter
pico-second
01
inch
free
space
distance
electromagnetic
range
feet
transmitter
transmits
sequence
pulses
response
transmit
timing
signal
receiver
samples
controlled
receive
generates
sample
circuit
supplies
causes
time
transmission
sampling
sweeps
delays
sweep
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sampled
repetition
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produce
representing
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equivalent
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analyzes
indicate
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control circuitry
receive timing
sample signal
signal representing
pulse repetition
electromagnetic pulses
equivalent time
signal processor
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repetition rate
timing signal
timing circuit
transmit timing
free space
radio location
receiver sweeps
signal sweeps
sweep cycle
transmitter transmits
processor analyzes
received pulse
receiver samples
rf pulse
controlled timing
circuit supplies
magnetic pulse
signal process
radar configuration
transmitted rf
time-of-flight radio
electromagnetic pulse
bi-static radar
configuration measures
direct time-of-flight
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