SYSTEM AND METHODS FOR NULL STEERING IN A MULTICARRIER SYSTEM
First Claim
1. A system for cancelling spatial interference associated with an original multi-carrier signal carrying at least one data transmission sent by a transmitter to an antenna array comprising a plurality of antennae and having a receiver operatively associated therewith, the system receiving a plurality of received signals respectively including the interference and the original signal as received by a respective individual antenna from among the plurality of antennae, the system comprising:
- a spatial nulling device for generating a cleaner signal by reducing at least one spatial component of said interference; and
a signal manipulator operative to manipulate a derivative of said received signal so as to cause said at least one data transmission to be more concentrated in a subset of frequency bands in which the spatial nulling device is more effective and to be less concentrated in frequency bands which do not belong to said subset of frequency bands.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and methods for cancelling spatial interference associated with an original multi-carrier signal carrying at least one data transmission sent by a transmitter to an antenna array comprising a plurality of antennae and having a receiver operatively associated therewith, the system receiving a plurality of received signals respectively including interference and the original signal as received by a respective individual antenna from among the plurality of antennae, the system comprising a spatial nulling device for generating a cleaner signal by reducing at least one spatial component of the interference; and a signal manipulator operative to manipulate a derivative of the received signal so as to cause the at least one data transmission to be more concentrated in a subset of frequency bands in which the spatial nulling device is more effective and to be less concentrated in frequency bands which do not belong to the subset of frequency bands.
16 Citations
102 Claims
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1. A system for cancelling spatial interference associated with an original multi-carrier signal carrying at least one data transmission sent by a transmitter to an antenna array comprising a plurality of antennae and having a receiver operatively associated therewith, the system receiving a plurality of received signals respectively including the interference and the original signal as received by a respective individual antenna from among the plurality of antennae, the system comprising:
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a spatial nulling device for generating a cleaner signal by reducing at least one spatial component of said interference; and a signal manipulator operative to manipulate a derivative of said received signal so as to cause said at least one data transmission to be more concentrated in a subset of frequency bands in which the spatial nulling device is more effective and to be less concentrated in frequency bands which do not belong to said subset of frequency bands. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 13, 15, 16, 17, 36, 37, 38, 42, 43, 48, 49, 50, 51, 101)
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2. (canceled)
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11. (canceled)
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12. (canceled)
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14. (canceled)
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18. (canceled)
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19. (canceled)
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20-28. -28. (canceled)
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29. A method for cancelling spatial interference associated with an original multi-carrier signal carrying at least one data transmission sent by a transmitter to an antenna array comprising a plurality of antennae and having a receiver operatively associated therewith, the system receiving a plurality of received signals respectively including said interference and said original signal as received by a respective individual antenna from among the plurality of antennae, the system comprising:
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using a spatial nulling device for generating a cleaner signal by reducing at least one spatial component of said interference; and manipulating a derivative of said received signal so as to cause said at least one data transmission to be more concentrated in a subset of frequency bands in which the spatial nulling device is more effective and to be less concentrated in frequency bands which do not belong to said subset of frequency bands. - View Dependent Claims (30, 31, 32, 39, 44, 45, 46)
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33-35. -35. (canceled)
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40. (canceled)
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41. (canceled)
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47. (canceled)
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52-69. -69. (canceled)
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70. In a multi-carrier communication system including a receiver, at least one transmitter transmitting a multi-carrier signal defining multiple carriers to the receiver, an interference canceller for cancelling spatial interference and a scheduler which is operative, for each individual time frame along a temporal axis, to allocate to various data transmissions, respective portions of a time-frequency region defined over said individual time frame, the multi-carrier signal defining a multiplicity of carriers together spanning a frequency band,
a method for adapting said interference canceller to said interference, the method comprising: -
using the scheduler to reserve at least one empty sub-region within said time-frequency region by allocating said multiple carriers, taking into account channel quality over various frequencies, such that only portions external to said sub-region are allocated to each of the data transmissions; and configuring the interference canceller by deriving, from signal content in the empty sub-region, at least one interference-dependent parameter of the interference canceller'"'"'s operation.
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71-100. -100. (canceled)
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102-160. -160. (canceled)
Specification