System for determining position from suppressed carrier radio waves

Claim 2

In a method of determining position by measuring phases of suppressed carrier-waves implicit in radio signals received from earth-orbiting satellites, an improvement comprising: (a) receiving said signals from a plurality of said satellites simultaneously by means of an omnidirectional antenna; (b) separating said received signals into first and second portions representing different radio-frequency bands; and (c) correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously.

Claim 3

The method of claim 1 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 4

The method of claim 1 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 5

The method of claim 3 wherein said modulation may be encrypted.

Claim 6

In an apparatus for determining position by measuring phases of suppressed carrier-waves implicit in radio signals received from earth-orbiting satellites, an improvement comprising: (a) an omnidirectional antenna for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said received signals into first and second portions representing different radio-frequency bands; and (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously.

Claim 7

In an apparatus for determining position by measuring phases of suppressed carrier-waves implicit in radio signals received from earth-orbiting satellites, an improvement comprising: (a) an omnidirectional antenna for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said received signals into first and second portions representing different radio-frequency bands; and (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously.

Claim 8

The apparatus of claim 5 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 9

The apparatus of claim 5 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 10

The apparatus of claim 7 wherein said modulation may be encrypted.

Claim 11

In a method of determining relative positions of a plurality of points by measuring phases of suppressed carrier-waves implicit in radio signals received at said points from earth-orbiting satellites, an improvement comprising: (a) receiving said signals from a plurality of said satellites simultaneously by means of an omnidirectional antenna at each said point; (b) separating said signals received at each said point into first and second portions representing different radio-frequency bands; and (c) correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously, at each said point.

Claim 12

In a method of determining relative positions of a plurality of points by measuring phases of suppressed carrier-waves implicit in radio signals received at said points from earth-orbiting satellites, an improvement comprising: (a) receiving said signals from a plurality of said satellites simultaneously by means of an omnidirectional antenna at each said point; (b) separating said signals received at each said point into first and second portions representing different radio-frequency bands; and (c) correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously, at each said point.

Claim 13

The method of claim 9 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 14

The method of claim 9 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 15

The method of claim 11 wherein said modulation may be encrypted.

Claim 16

In an apparatus for determining relative positions of a plurality of points by measuring phases of suppressed carrier-waves implicit in radio signals received at said points from earth-orbiting satellites, an improvement comprising: (a) an omnidirectional antenna at each said point for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said signals received at each said point into first and second portions representing different radio-frequency bands; and (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier waves for a plurality of satellites simultaneously, at each said point.

Claim 17

In an apparatus for determining relative positions of a plurality of points by measuring phases of suppressed carrier-waves implicit in radio signals received at said points from earth-orbiting satellites, an improvement comprising: (a) an omnidirectional antenna at each said point for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said signals received at each said point into first and second portions representing different radio-frequency bands; and (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier waves for a plurality of satellites simultaneously, at each said point.

Claim 18

The apparatus of claim 13 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 19

The apparatus of claim 13 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 20

The apparatus of claim 15 wherein said modulation may be encrypted.

Claim 23

The method of claim 17 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 24

The method of claim 17 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 25

The method of claim 19 wherein said modulation may be encrypted.

Claim 26

Apparatus for determining position using radio signals received from earth-orbiting satellites, when said signals have suppressed carrier-waves, said apparatus comprising: (a) an omnidirectional antenna for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said received signals into first and second portions representing different radio-frequency bands; (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously; and (d) means for determining position from said plural-satellite phase data.

Claim 27

Apparatus for determining position using radio signals received from earth-orbiting satellites, when said signals have suppressed carrier-waves, said apparatus comprising: (a) an omnidirectional antenna for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said received signals into first and second portions representing different radio-frequency bands; (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously; and (d) means for determining position from said plural-satellite phase data.

Claim 28

The apparatus of claim 21 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 29

The apparatus of claim 21 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 30

The apparatus of claim 23 wherein said modulation may be encrypted.

Claim 33

The method of claim 25 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 34

The method of claim 25 wherein said signals have modulation, and said first and second portions are similar by virture of said modulation.

Claim 35

The method of claim 27 wherein said modulation may be encrypted.

Claim 36

Apparatus for determining the relative positions of a plurality of points using radio signals received at said points from earth-orbiting satellites, when said signals have suppressed carrier-waves, said method comprising: (a) an omnidirectional antenna at each said point for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said received signals, received at each said point, into first and second portions representing different radio-frequency bands; (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously, at each said point; and (d) means for combining said plural-satellite phase data from said plurality of points to determine said relative positions.

Claim 37

Apparatus for determining the relative positions of a plurality of points using radio signals received at said points from earth-orbiting satellites, when said signals have suppressed carrier-waves, said method comprising: (a) an omnidirectional antenna at each said point for receiving said signals from a plurality of said satellites simultaneously; (b) a frequency band separator for separating said received signals, received at each said point, into first and second portions representing different radio-frequency bands; (c) a correlator for correlating said first portion with said second portion to obtain data representing the phases of said carrier-waves for a plurality of said satellites simultaneously, at each said point; and (d) means for combining said plural-satellite phase data from said plurality of points to determine said relative positions.

Claim 38

The apparatus of claim 29 wherein said signals have Doppler shifts and satellite-specific estimates of said Doppler shifts are utilized in obtaining said data representing the phases of said carrier waves.

Claim 39

The apparatus of claim 29 wherein said signals have modulation, and said first and second portions are similar by virtue of said modulation.

Claim 40

The apparatus of claim 31 wherein said modulation may be encrypted.