Wireless Communications Device Including a Joint Space-Time Optimum Filters (JSTOF) Using Singular Value Decompositions (SVD)
First Claim
1. A wireless communications device comprising:
- a wireless transmitter and a wireless receiver;
wherein said wireless receiver comprises a filter for reducing co-channel interference within a communications receiver, said filter comprising a multi-channel, space-time filter circuit that filters n signal parts that have been split from a communications signal by jointly estimating space-time filter weights and multi-channel impulse responses (CIRs) based upon a singular value decomposition (SVD), and a multi-channel, matched filter circuit that receives multi-channel signals from the multi-channel, space-time filter circuit and has a filter response that is provided by a channel impulse response estimation from the space-time filter circuit.
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Accused Products
Abstract
A wireless communications device may include a wireless transmitter and a wireless receiver. The wireless receiver may include a filter for reducing co-channel interference and may include a multi-channel, space-time filter circuit that filters n signal parts that have been split from a communications signal by jointly estimating space-time filter weights and multi-channel impulse responses (CIRs) based upon a singular value decomposition (SVD). The filter may further include a multi-channel, matched filter circuit that receives multi-channel signals from the multi-channel, space-time filter circuit and has a filter response that is provided by a channel impulse response estimation from the space-time filter circuits
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Citations
23 Claims
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1. A wireless communications device comprising:
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a wireless transmitter and a wireless receiver;
wherein said wireless receiver comprises a filter for reducing co-channel interference within a communications receiver, said filter comprising a multi-channel, space-time filter circuit that filters n signal parts that have been split from a communications signal by jointly estimating space-time filter weights and multi-channel impulse responses (CIRs) based upon a singular value decomposition (SVD), and a multi-channel, matched filter circuit that receives multi-channel signals from the multi-channel, space-time filter circuit and has a filter response that is provided by a channel impulse response estimation from the space-time filter circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communications device comprising:
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a joint space-time filter comprising a multi-channel, space-time filter circuit that filters n signal parts that have been split from a communications signal by jointly estimating space-time filter weights and multi-channel impulse responses (CIRs) based upon a singular value decomposition (SVD), and a multi-channel, matched filter circuit that receives multi-channel signals from the multi-channel, space-time filter circuit and has a filter response that is provided by a channel impulse response estimation from the space-time filter circuit, and an alternative filter operative when an interference level is below a predetermined threshold and comprising a matched filter, a cross-correlation circuit, and a switch mechanism for switching the n signal parts into the matched filter and cross-correlation circuit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of reducing co-channel interference within a wireless communications device and comprising:
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providing a wireless receiver for the wireless communications device comprising a multi-channel, space-time filter circuit and a multi-channel matched filter circuit;
splitting a communications signal into n signal parts;
filtering the n signal parts within a multi-channel, space-time filter circuit and jointly estimating space-time filter weights and multi-channel channel impulse responses (CIRs) based upon a singular value decomposition (SVD); and
receiving multi-channel signals from the space-time filter circuit within the multi-channel matched filter circuit having a filter response that is provided by a channel impulse response estimation from the space-time filter circuit. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification