Phase sweeping methods for transmit diversity and diversity combining in bts sector extension and in wireless repeaters
First Claim
1. Apparatus for inserting transmit diversity into an RF or IF signal for transmission, comprising:
- an RF splitter for splitting said signal for transmission into two signal parts, and a non-linear phase modulator, associated with said RF splitter, for applying a non-linear phase modulation to one of said two signal parts, thereby to provide transmit diversity between said first signal part and said second signal part.
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Accused Products
Abstract
Apparatus for inserting transmit diversity into an RF signal for transmission, comprises: an RF splitter for splitting the RF signal to be transmitted into two signal parts, and a non-linear phase modulator which applies a non-linear phase modulation to one of the two signal parts, thereby to provide transmit diversity between the first signal part and the second signal part. One of the ways of inserting a non-linear phase modulation into the RF signal is to use a spinning disc with tracks of different dielectric strength. The apparatus is useful in cellular telephony for supplying repeaters and base station extensions with diversity capability.
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Citations
36 Claims
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1. Apparatus for inserting transmit diversity into an RF or IF signal for transmission, comprising:
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an RF splitter for splitting said signal for transmission into two signal parts, and a non-linear phase modulator, associated with said RF splitter, for applying a non-linear phase modulation to one of said two signal parts, thereby to provide transmit diversity between said first signal part and said second signal part. - 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)
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32. A phase modulating element for modulating an RF or IF frequency, comprising:
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first and second movable dielectric plates, first and second ground lines located in between said first and second movable plates, and a strip line located in between said first and second ground lines, said movable dielectric plates and said strip line forming a tri-plate variable dielectric transmission line to provide a non-linear modulation. - View Dependent Claims (33, 34)
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35. Method for inserting transmit diversity into an RF or IF signal for transmission, comprising:
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splitting said signal for transmission into two signal parts, and applying a non-linear phase modulation to one of said two signal parts, thereby to provide transmit diversity between said first signal part and said second signal part. - View Dependent Claims (36)
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Specification