Apparatus and method for a system architecture for multiple antenna wireless communication systems using round robin channel estimation and transmit beam forming algorithms
First Claim
1. A multiple antenna wireless system including a transmitter and a receiver comprising:
- a reconfigurable large antenna array having a plurality of antennas;
a plurality of RF chains in the transmitter coupled to the reconfigurable large antenna array;
a pilot assisted channel estimation means for tracking of a fading channel; and
an adaptive transmit beamforming means at the transmitter for beamforming the reconfigurable large antenna array,where the receiver measures performance of the fading channel, generates relative channel phase information, and feeds back the relative channel phase information to the transmitter, the system further comprises a plurality of RF phase shifters coupled to the large antenna array, the RF phase shifters being adjusted to perform co-phase transmission (CPT) using the relative channel phase information fed back from the receiver.
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Accused Products
Abstract
A multiple antenna wireless system including a transmitter and a receiver comprises a reconfigurable large antenna array having a plurality of antennas. A plurality of RF chains in the transmitter is coupled to the reconfigurable large antenna array. A pilot assisted round robin channel estimation means tracks the fading channel; and an adaptive round robin transmit beamforming means beam forms the reconfigurable large antenna array. A method for multiple antenna wireless communication comprising the steps of tracking a plurality of fading channels in a reconfigurable large antenna array having a plurality of antennas using pilot assisted round robin channel estimation to selectively couple a plurality of RF chains in the transmitter to the reconfigurable large antenna array, and adaptively, round-robin transmit beamforming the reconfigurable large antenna array.
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Citations
11 Claims
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1. A multiple antenna wireless system including a transmitter and a receiver comprising:
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a reconfigurable large antenna array having a plurality of antennas; a plurality of RF chains in the transmitter coupled to the reconfigurable large antenna array; a pilot assisted channel estimation means for tracking of a fading channel; and an adaptive transmit beamforming means at the transmitter for beamforming the reconfigurable large antenna array, where the receiver measures performance of the fading channel, generates relative channel phase information, and feeds back the relative channel phase information to the transmitter, the system further comprises a plurality of RF phase shifters coupled to the large antenna array, the RF phase shifters being adjusted to perform co-phase transmission (CPT) using the relative channel phase information fed back from the receiver. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for multiple antenna wireless communication comprising:
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tracking a plurality of fading channels in a reconfigurable large antenna array having a plurality of antennas using pilot assisted channel estimation to selectively couple a plurality of RF chains in the transmitter to the reconfigurable large antenna array by estimating channel phase information; and adaptively, transmit beamforming the reconfigurable large antenna array by using the channel phase information to adjust transmitter parameters to increase performance of the wireless systems, wherein the system is operated in a closed loop mode, and where adaptively, round-robin transmit beamforming comprises coupling a baseband modulator coupled in sequence to each of the antennas of the large antenna array to provide the pilot training signal in sequence to each antenna as controlled by a selected configuration of a plurality of RF switches with the other ones of the antennas being coupled to a data signal, generating relative channel phase information between the antenna being trained and a first antenna trained, sending the relative channel phase information back for each antenna as it is trained, adjusting a phase shifter corresponding to the trained antenna to attain maximum signal-to-noise ratio (SNR) at the trained antenna. - View Dependent Claims (8)
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9. A method for multiple antenna wireless communication comprising:
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tracking a plurality of fading channels in a reconfigurable large antenna array having a plurality of antennas using pilot assisted channel estimation to selectively couple a plurality of RF chains in the transmitter to the reconfigurable large antenna array; and adaptively, transmit beamforming the reconfigurable large antenna array, where adaptively, transmit beamforming comprises measuring performance of the fading channel, generating relative channel phase information, and feeding back the relative channel phase information, adjusting a plurality of RF phase shifters coupled to the large antenna array to perform co-phase transmission (OPT) using the relative channel phase information fed back.
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10. A method for multiple antenna wireless communication comprising:
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tracking a plurality of fading channels in a reconfigurable large antenna array having a plurality of antennas using pilot assisted round robin channel estimation to selectively couple a plurality of RF chains in the transmitter to the reconfigurable large antenna array; and adaptively, round-robin transmit beamforming the reconfigurable large antenna array, where adaptively, round-robin transmit beamforming the reconfigurable large antenna array comprises transmit beamforming in an open loop mode where there is no channel state information available using STCs to provide spatial diversity to compensate for channel fading, where all but one of the antennas are coupled to a corresponding RF chain and operate as a single combined antenna with respect to channel path gain, the one antenna operating to track the plurality of fading channels.
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11. A method for multiple antenna wireless communication comprising:
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tracking a plurality of fading channels in a reconfigurable large antenna array having a plurality of antennas using pilot assisted round robin channel estimation to selectively couple a plurality of RF chains in the transmitter to the reconfigurable large antenna array; and adaptively, round-robin transmit beamforming the reconfigurable large antenna array, where the system is operated in a closed loop mode, where there is channel state information available, where adaptively, round-robin transmit beamforming comprises directing a pilot training signal to a selected one of the antennas in the large antenna array in sequence until the corresponding channels for each of the antennas has been trained in a round robin fashion, and feeding back channel phase information to reconfigure the corresponding antenna being trained in a round robin fashion.
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Specification