Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals
DCFirst Claim
1. An apparatus for simultaneously providing terrestrially transmitted signals on a common frequency with direct broadcast satellite signals transmitted from a satellite in a first satellite location in geosynchronous orbit about the earth, the apparatus comprising:
- (a) a first antenna at a user location for receiving signals at a first frequency only within a first directional reception range as measured from a centerline of the first antenna, the first antenna having its centerline aligned to receive direct broadcast satellite signals transmitted from the satellite;
(b) a second antenna at the user location for receiving signals at the first frequency only within a second directional reception range as measured from a centerline of the second antenna, the second antenna being aligned to receive signals transmitted at the first frequency from a terrestrial transmitter location remote from the user location with the direct broadcast satellite signals transmitted in directions outside of the second directional reception range; and
(c) a terrestrial transmitter for transmitting signals at the first frequency and directionally within a terrestrial azimuth range from the terrestrial transmitter location, the terrestrial transmitter location being located with respect to the user location such that the terrestrial transmitter transmits in directions only outside of the directional reception range of the first antenna.
3 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A first antenna (16) at a user location (14) receives signals at a first frequency where the signals are travelling only within a first directional reception range as measured from a centerline (28) of the first antenna (16). The first antenna (16) has its centerline (28) aligned to receive direct broadcast satellite signals transmitted from a satellite in geosynchronous orbit about the earth. A second antenna (18) at the user location (14) receives signals at the first frequency where the signals are travelling only within a second directional reception range as measured from a centerline (30) of the second antenna (18). The second antenna (18) is aligned to receive signals transmitted at the first frequency from a terrestrial transmitting location remote from the user location. A terrestrial transmitter transmits signals at the first frequency and directionally within a terrestrial azimuth range from the terrestrial transmitting location. The terrestrial transmitting location is located with respect to the user location (14) such that the terrestrial transmitter (20) transmits in directions only outside of the directional reception range of the first antenna (16). The satellite (12) is positioned with respect to the user location (14) such that the satellite transmits directional in directions outside of the directional reception range of the second antenna (18).
307 Citations
12 Claims
-
1. An apparatus for simultaneously providing terrestrially transmitted signals on a common frequency with direct broadcast satellite signals transmitted from a satellite in a first satellite location in geosynchronous orbit about the earth, the apparatus comprising:
-
(a) a first antenna at a user location for receiving signals at a first frequency only within a first directional reception range as measured from a centerline of the first antenna, the first antenna having its centerline aligned to receive direct broadcast satellite signals transmitted from the satellite; (b) a second antenna at the user location for receiving signals at the first frequency only within a second directional reception range as measured from a centerline of the second antenna, the second antenna being aligned to receive signals transmitted at the first frequency from a terrestrial transmitter location remote from the user location with the direct broadcast satellite signals transmitted in directions outside of the second directional reception range; and (c) a terrestrial transmitter for transmitting signals at the first frequency and directionally within a terrestrial azimuth range from the terrestrial transmitter location, the terrestrial transmitter location being located with respect to the user location such that the terrestrial transmitter transmits in directions only outside of the directional reception range of the first antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for simultaneously providing local originating signals on a common frequency with direct broadcast satellite signals transmitted from a satellite, where the satellite is in a first satellite location in geosynchronous orbit about the earth, the method comprising the steps of:
-
(a) at a user location, receiving direct broadcast satellite signals at a first frequency with a first antenna adapted to receive signals at the first frequency only within a first directional reception range as measured from a centerline of the first antenna; (b) transmitting terrestrial signals at the first frequency and in a terrestrial azimuth range from a terrestrial transmitter, the terrestrial azimuth range being outside of the directional reception range of the first antenna positioned to receive direct broadcast satellite signals from the satellite; and (c) at the user location, remote from the terrestrial transmitter, receiving the terrestrial signals with a second antenna adapted for receiving signals at the first frequency only within a second directional reception range as measured from a centerline of the second antenna, the second antenna being aligned so that the direct broadcast satellite signals transmitted by the satellite are not transmitted within the directional reception range of the second antenna. - View Dependent Claims (9, 10, 11, 12)
-
Specification