Delay diversity in antenna arrays
First Claim
1. In a wireless transmission system including a transmit delay module, delaying each of at least one copy of a signal by a respective delay, the signal being transmitted over a plurality of carrier frequencies and over at least one beam, the at least one beam exhibiting a beam pattern, the number of copies of the signal corresponding to the number of beams, each said at least one copy being associated with a respective one of said at least one beam, said system further including a beam pattern former, coupled with said transmit delay module, producing a plurality of transmit signals corresponding to the beam pattern,a frequency dependent beam shifter, coupled with the beam pattern former, delaying each of the at least one transmit signal by a respective angular shift delay, thereby applying an angular shift to each of the at least one beam, the angular shift of each of the at least one beam corresponding to at least a respective one of the carrier frequencies,wherein each beam is transmitted with a delay corresponding to the transmit delay of each said copy.
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Accused Products
Abstract
In a wireless transmission system including a transmit delay module, delaying each of at least one copy of a signal by a respective delay, the signal being transmitted over a plurality of carrier frequencies and over at least one beam, the at least one beam exhibiting a beam pattern, the number of copies of the signal corresponding to the number of beams, each the at least one copy being associated with a respective one of the at least one beam, the system further including a beam pattern former, coupled with the transmit delay module, producing a plurality of transmit signals corresponding to the beam pattern, a frequency dependent beam shifter, coupled with the beam pattern former, delaying each of the at least one transmit signal by a respective angular shift delay, thereby applying an angular shift to each of the at least one beam, the angular shift of each of the at least one beam corresponding to at least a respective one of the carrier frequencies, wherein each beam is transmitted with a delay corresponding to the transmit delay of each the copy.
13 Citations
26 Claims
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1. In a wireless transmission system including a transmit delay module, delaying each of at least one copy of a signal by a respective delay, the signal being transmitted over a plurality of carrier frequencies and over at least one beam, the at least one beam exhibiting a beam pattern, the number of copies of the signal corresponding to the number of beams, each said at least one copy being associated with a respective one of said at least one beam, said system further including a beam pattern former, coupled with said transmit delay module, producing a plurality of transmit signals corresponding to the beam pattern,
a frequency dependent beam shifter, coupled with the beam pattern former, delaying each of the at least one transmit signal by a respective angular shift delay, thereby applying an angular shift to each of the at least one beam, the angular shift of each of the at least one beam corresponding to at least a respective one of the carrier frequencies, wherein each beam is transmitted with a delay corresponding to the transmit delay of each said copy.
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6. A wireless transmission system comprising:
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a transmit delay module, delaying each of at least one copy of a signal by a respective delay, said signal being transmitted over a plurality of carrier frequencies and over at least one beam, said at least one beam exhibiting a beam pattern, the number of copies of said signal corresponding to the number of beams, each said at least one copy being associated with a respective one of said at least one beam; a beam pattern former, coupled with said transmit delay module, producing a plurality of transmit signals corresponding to said beam pattern; and a frequency dependent beam shifter, coupled with said beam pattern former, delaying each of said transmit signals by a respective angular shift delay, thereby applying an angular shift to each of said at least one beam, the angular shift of each of said at least one beam corresponding to at least a respective one of said carrier frequencies, wherein each beam is transmitted with a delay corresponding to the transmit delay of each said copy. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. Method for transmitting a signal over a plurality of carrier frequencies and a plurality of beams, the beams exhibiting a beam pattern, the method comprising the procedures of:
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delaying each copy of the signal by a corresponding transmit delay; applying a beam forming matrix to the delayed copies of the signal, thereby producing transmit signals corresponding to the beam pattern, each transmit signal being associated with at least one carrier frequency; and delaying each of said transmit signals by a respective angular shift delay, thereby applying an angular shift to each beam in the beam pattern, said angular shift of each beam corresponding to each carrier frequency. - View Dependent Claims (23, 24, 25, 26)
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Specification