System And Method Of Wireless Communication Using Large-Scale Antenna Networks
First Claim
1. A communication method using a distributed cell-free network of service antennas, comprising:
- allocating pilot sequences to a user population of access terminals by an allocation procedure that imposes local relative orthogonality of pilot sequences;
determining one or more channel coefficients for each said access terminal by measuring allocated pilot sequences as received by each service antenna in an active subpopulation of the service antennas; and
at each service antenna of the active subpopulation, using the channel coefficients to precode forward link signals or to partially decode reverse link signals.
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Abstract
A communication method uses a distributed cell-free network of spatially independent service antennas. According to the method, pilot sequences are allocated to a user population of access terminals by an allocation procedure that imposes local relative orthogonality of pilot sequences. Channel coefficients for access terminals arc determined by measuring allocated pilot sequences as received by each of the service antennas. In embodiments of the invention, the determination of channel coefficients is performed independently and the resulting channel coefficients are locally stored at the respective service antennas. At each service antenna, a processor independently uses locally stored channel coefficients to precode forward link signals or to at least partially decode reverse link signals.
234 Citations
16 Claims
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1. A communication method using a distributed cell-free network of service antennas, comprising:
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allocating pilot sequences to a user population of access terminals by an allocation procedure that imposes local relative orthogonality of pilot sequences; determining one or more channel coefficients for each said access terminal by measuring allocated pilot sequences as received by each service antenna in an active subpopulation of the service antennas; and at each service antenna of the active subpopulation, using the channel coefficients to precode forward link signals or to partially decode reverse link signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A network node communicatively connected to a distributed cell-free network of service antennas, wherein:
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the node is configured, using the service antennas, to allocate pilot sequences to a user population of access terminals by an allocation procedure that imposes local relative orthogonality of pilot sequences; the node is configured to deliver the same plurality of messages to each service antenna of an active subpopulation of the network of service antennas for synchronized transmission by the active subpopulation, wherein each message is destined for a respective access terminal; the node is configured to receive, from at least one service antenna of an active subpopulation of the network of service antennas, a partially decoded version of a message from each access terminal in a user population of access terminals; and the node is configured to recover a decoded version of each respective said message. - View Dependent Claims (16)
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Specification