Beamforming for non-collaborative, space division multiple access systems
First Claim
1. A wireless communication method using beamforming for a noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system, the method comprising:
- receiving signals on k multiple antennas of a first device, wherein “
k”
is an integer greater than one (1);
during at least a first period of time, combining the signals using a combining vector v1, wherein the combining vector v1 corresponds to a right singular vector corresponding to a substantially maximal singular value of channel matrix H1, wherein H1 represents a channel between the first device and a second device;
during at least the first period of time, determining a data signal using the combining vector v1; and
transmitting information to a second device that allows the second device to use the combining vector v1 to design a weight vector.
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Accused Products
Abstract
A wireless communication system noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector wi for each subscriber station using the determined combining vector of the subscriber station. The ith combining vector corresponds to a right singular vector corresponding to a maximum singular value of a channel matrix between a base station and the ith subscriber station. Each subscriber station transmits signals using a weight vector vi, which corresponds to a left singular vector corresponding to a maximum singular value of a channel matrix between the ith subscriber station and the base station. The base station uses the weight vector wi to determine the signal transmitted by the ith subscriber station.
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Citations
20 Claims
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1. A wireless communication method using beamforming for a noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system, the method comprising:
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receiving signals on k multiple antennas of a first device, wherein “
k”
is an integer greater than one (1);
during at least a first period of time, combining the signals using a combining vector v1, wherein the combining vector v1 corresponds to a right singular vector corresponding to a substantially maximal singular value of channel matrix H1, wherein H1 represents a channel between the first device and a second device;
during at least the first period of time, determining a data signal using the combining vector v1; and
transmitting information to a second device that allows the second device to use the combining vector v1 to design a weight vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A subscriber station comprising:
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a receiver to receive beam formed signals on k antennas of a first receiver, wherein “
k”
is an integer greater than one;
a module to combine the signals using a combining vector v1 to determine a data signal, wherein during at least a first period of time, the combining vector v1 corresponds to a right singular vector corresponding to a substantially maximal singular value of channel matrix H1, wherein H1 represents a channel between the first receiver and a transmitter; and
a transmitter to transmit information to a multiple antenna base station that allows the base station to use the combining vector v1 to design a weight vector. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless communication method using beamforming for a noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system, the method comprising:
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determining a weight vector v1 corresponding to a left singular vector corresponding to a substantially maximal singular value of channel matrix H1, wherein H1 represents a channel between a first device and a second device;
transmitting information to the second device from the first device that allows the second device to use a combining vector v1 corresponding to a right singular vector corresponding to a substantially maximal singular value of channel matrix H1 to design a weight vector w1; and
transmitting a signal to the second device using the weight vector v1.
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Specification