Apparatus and method of multiple antenna transmitter beamforming of high data rate wideband packetized wireless communication signals
First Claim
1. An apparatus for multiple antenna transmitter beamforming M digital output OFDM signals (“
- M signals”
) each including sub-carrier data in N frequency bins in a wideband wireless packetized communication network, wherein the M signals are each adapted for transmission onto different communication channels, and wherein each of the M signals are obtained from a same single digital signal, wherein N is a positive integer greater than 1, the apparatus comprising;
a transmit beamformer adapted to phase steer and weight the sub-carrier data in each of the N frequency bins for each of the M signals, thereby generating phase steered and weighted frequency data for each of the M signals,wherein the transmit beamformer includes;
a weight calculator adapted to calculate M complex weights for each of the N frequency bins based on channel estimates of the different communication channels; and
a weighting block adapted to apply the M complex weights to the sub-carrier data corresponding to each of the N frequency bins for each of the M signals to obtain the phase steered and weighted frequency data for each of the M signals,wherein at least some of the M complex weights are normalized to satisfy an Effective Isotropic Radiated Power (EIRP) limit and a per-chain power limit; and
M Inverse Fast Fourier Transform units (IFFTs) that are each adapted to input the phase steered and weighted frequency data for one of the M signals and each convert the phase steered and weighted frequency data corresponding to that one M signal to obtain that one M signal, wherein M is an integer greater than or equal to 2, such that the M signals are adapted to shape a distinct array antenna pattern.
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Abstract
The present invention provides an apparatus and method of multiple antenna transmitter beamforming of high data rate wideband packetized wireless communication signals, where each of the signals comprises N frequencies, where N is a positive integer. The apparatus, in an exemplary embodiment, includes (1) a transmit beamformer that co-phases and weights the signals for each of the N frequencies across M antennas, thereby generating M co-phased and weighted frequency data and (2) M Inverse Fast Fourier Transform units (IFFTs) that convert the M co-phased and weighted frequency data into M digital outputs, and M transmit antennas transmitting the M co-phased and weighted signals, where M is an integer greater than or equal to 2.
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Citations
67 Claims
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1. An apparatus for multiple antenna transmitter beamforming M digital output OFDM signals (“
- M signals”
) each including sub-carrier data in N frequency bins in a wideband wireless packetized communication network, wherein the M signals are each adapted for transmission onto different communication channels, and wherein each of the M signals are obtained from a same single digital signal, wherein N is a positive integer greater than 1, the apparatus comprising;a transmit beamformer adapted to phase steer and weight the sub-carrier data in each of the N frequency bins for each of the M signals, thereby generating phase steered and weighted frequency data for each of the M signals, wherein the transmit beamformer includes; a weight calculator adapted to calculate M complex weights for each of the N frequency bins based on channel estimates of the different communication channels; and a weighting block adapted to apply the M complex weights to the sub-carrier data corresponding to each of the N frequency bins for each of the M signals to obtain the phase steered and weighted frequency data for each of the M signals, wherein at least some of the M complex weights are normalized to satisfy an Effective Isotropic Radiated Power (EIRP) limit and a per-chain power limit; and M Inverse Fast Fourier Transform units (IFFTs) that are each adapted to input the phase steered and weighted frequency data for one of the M signals and each convert the phase steered and weighted frequency data corresponding to that one M signal to obtain that one M signal, wherein M is an integer greater than or equal to 2, such that the M signals are adapted to shape a distinct array antenna pattern. - 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, 32, 33, 34, 35)
- M signals”
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36. A method of multiple antenna transmitter beamforming M digital output OFDM signals (“
- M signals”
) each including sub-carrier data in N frequency bins in a wideband wireless packetized communication network, wherein the M signals are each adapted for transmission onto different communication channels, and wherein each of the M signals are obtained from a same single digital signal, wherein N is a positive integer greater than 1, the method comprising;phase steering and weighting the sub-carrier data in each of the N frequency bins for each of the M signals, thereby generating phase steered and weighted frequency data for each of the M signals, wherein phase steering and weighting includes; calculating M complex weights for each of the N frequency bins based on channel estimates of the different communication channels, wherein at least some of the M complex weights are normalized to satisfy an Effective Isotropic Radiated Power (EIRP) limit and a per-chain power limit; and applying the M complex weights to the sub-carrier data corresponding to each of the N frequency bins for each of the M signals to obtain the phase steered and weighted frequency data for each of the M signals; and converting the phase steered and weighted frequency data corresponding to each of the M signals using an Inverse Fast Fourier Transform (IFFT) to obtain the M signals, wherein M is an integer greater than or equal to 2, such that the M signals are adapted to shape a distinct array antenna pattern. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
- M signals”
Specification