JOINT ESTIMATION OF MIMO CHANNELS AND NOISE CORRELATION FOR WIRELESS SYSTEMS WITH MULTIPLE RECEIVE ANTENNAS
First Claim
1. A method for receiving a radio communication sent by a transmitter having M transmit antennas to a receiver having N receive antennas, where M is a positive integer greater than or equal to one and N is positive integer greater than one, the method comprising:
- receiving N output signals, one for each receive antenna, where a signal transmitted from each of M transmit antennas includes predetermined pilot symbols known by the receiver and information symbols to be determined by the receiver;
determining weights for estimating each of M×
N single-input/single-output channels between transmit and receive antennas based on jointly processing pilot symbols received on all of the N receive antennas;
estimating the M×
N single-input/single-output channels based on the determined weights; and
using the estimated channels to determine the information symbols.
1 Assignment
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Accused Products
Abstract
A radio communication sent by a transmitter having M transmit antennas is received by a receiver having N receive antennas, where M is a positive integer greater than or equal to one and N is positive integer greater than one. Thus, N output signals, one for each receive antenna, are received. The signal transmitted from each transmit antenna includes predetermined pilot symbols known by the receiver and information symbols to be determined by the receiver. Weights for estimating each of M×N single-input/single-output channels between transmit and receive antennas are determined based on jointly processing pilot symbols received on all of the N receive antennas. The M×N channels are estimated based on the determined weights, and those estimated channels are used to determine the information symbols. An iterative procedure is used to estimate the M×N channels using a noise correlation matrix estimate and to estimate the noise correlation matrix using the M×N channel estimates.
6 Citations
18 Claims
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1. A method for receiving a radio communication sent by a transmitter having M transmit antennas to a receiver having N receive antennas, where M is a positive integer greater than or equal to one and N is positive integer greater than one, the method comprising:
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receiving N output signals, one for each receive antenna, where a signal transmitted from each of M transmit antennas includes predetermined pilot symbols known by the receiver and information symbols to be determined by the receiver; determining weights for estimating each of M×
N single-input/single-output channels between transmit and receive antennas based on jointly processing pilot symbols received on all of the N receive antennas;estimating the M×
N single-input/single-output channels based on the determined weights; andusing the estimated channels to determine the information symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Receiving apparatus for receiving a radio communication sent by a transmitter having M transmit antennas, where M is a positive integer greater than or equal to one, comprising:
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N receive antennas, where N is a positive integer greater than one; radio processing circuitry for receiving N output signals, one for each receive antenna, where a signal transmitted from each of M transmit antennas includes predetermined pilot symbols known by the receiver and information symbols to be determined by the receiver; and baseband processing circuitry configured to; determine weights for estimating each of M×
N single-input/single-output channels between transmit and receive antennas based on jointly processing pilot symbols received on all of the N receive antennas;estimate the M×
N single-input/single-output channels based on the determined weights; anduse the estimated channels to determine the information symbols. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification