Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A velocity sensor system comprising: a source of narrow pulse radio signals, a plurality of receiving antennas spaced from each other for the reception of said signals backscattered from the ground, means for combining received radio signals with a first internally generated signal and producing thereby a first intermediate frequency, means for combining said first intermediate frequency with a second internally generated signal and thereby providing a second intermediate frequency, means for deriving intelligence signals from said second intermediate frequency, and means for measuring the time required for the received signals to traverse the distance between said receiving antennas whereby the velocity and drift angle of said vehicle may be determined.
Claim 2
Dependent Claim
111 words
A velocity sensor system comprising: a source of narrow pulse radio signals, a plurality of receiving antennas spaced from each other for the reception of said signals backscattered from the ground, means for combining received radio signals with a first internally generated signal and producing thereby a first intermediate frequency, means for combining said first intermediate frequency with a second internally generated signal and thereby providing a second intermediate frequency, means for deriving intelligence signals from said second intermediate frequency, and means for measuring the time required for the received signals to traverse the distance between said receiving antennas whereby the velocity and drift angle of said vehicle may be determined.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 comprising: means for maintaining said first internally generated signal at a fixed frequency.
Claim 4
Dependent Claim
21 words
The apparatus of claim 2 comprising: means for blanking said receiver during periods when said receiver is not tuned for reception.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 comprising: means for enabling said receiver prior to reception for controlling the frequency of said first internally generated frequency.
Claim 6
Dependent Claim
44 words
The apparatus of claim 4 comprising: a plurality of receiving channels in said receiver each comprising a mixer for combining said received signals with said first internally generated signals, a first IF amplifier, and a detector for removing the intelligences from the IF signal.
Claim 7
Dependent Claim
35 words
The apparatus of claim 5 comprising: three receiving antennas one for each receiving channel said receiving antennas being spaced a predetermined distance from each other so that received signals are alike but separated in time.
Claim 8
Dependent Claim
36 words
The apparatus of claim 6 comprising: means for stretching the returns for all scatterers so that there is time overlap of the total return energy and for supressing the side band frequencies of the return signal.
Claim 9
Dependent Claim
138 words
A three channel microwave receiver each of said channels comprising: a receiving antenna said antennas of each receiver oriented so that the distance between the centers of separate pairs are equal, a first mixer, a wide band IF amplifier, a second mixer, a narrow band IF amplifier, a detector, a first local oscillator connected to the inputs of each of said first mixers for providing a wide band IF frequency at the output of said IF amplifier, and a second local oscillator connected to the inputs of each of said second mixers for providing a narrow band IF frequency at the output of said second IF amplifier whereby said detectors provide a signal at their outputs capable of being used to determine the velocity of a received speckle pattern as it traverses the distance between said receiver horns.
Claim 10
Dependent Claim
138 words
A three channel microwave receiver each of said channels comprising: a receiving antenna said antennas of each receiver oriented so that the distance between the centers of separate pairs are equal, a first mixer, a wide band IF amplifier, a second mixer, a narrow band IF amplifier, a detector, a first local oscillator connected to the inputs of each of said first mixers for providing a wide band IF frequency at the output of said IF amplifier, and a second local oscillator connected to the inputs of each of said second mixers for providing a narrow band IF frequency at the output of said second IF amplifier whereby said detectors provide a signal at their outputs capable of being used to determine the velocity of a received speckle pattern as it traverses the distance between said receiver horns.
Claim 11
Dependent Claim
17 words
The apparatus of claim 8 comprising: means for automatically controlling the frequency of said first local oscillator.
Claim 12
Dependent Claim
32 words
The apparatus of claim 9 comprising: means for unblanking one of said receiver channels to receive a transmitter signal during a transmitting period and thereafter blanking said receiver during subsequent transmission times.