An endpoint comprising: a processor configured to: select a first transmission site from a plurality of transmission sites based on a quality of a first channel between the first transmission site and the endpoint; determine a first precoding matrix corresponding to the first transmission site, the first precoding matrix to be applied to data transmitted by the first transmission site to the endpoint; and determine a second precoding matrix corresponding to a second transmission site of the plurality of transmission sites, the second precoding matrix determined based on at least a first spatial direction, the first spatial direction calculated based on at least the first channel; determine a third precoding matrix for a third transmission site of the plurality of transmission sites, the third precoding matrix determined based at least on a composite spatial direction of effective channels associated with the first channel and a second channel between the second transmission site and the endpoint, each effective channel being a product in the frequency domain of a corresponding channel and a precoding matrix applied to data sent through the corresponding channel; and an interface coupled to the processor and configured to: communicate an indication of the first precoding matrix, an indication of the second precoding matrix, and an indication of the third precoding matrix to one or more of the plurality of transmission sites. a processor configured to: select a first transmission site from a plurality of transmission sites based on a quality of a first channel between the first transmission site and the endpoint; determine a first precoding matrix corresponding to the first transmission site, the first precoding matrix to be applied to data transmitted by the first transmission site to the endpoint; and determine a second precoding matrix corresponding to a second transmission site of the plurality of transmission sites, the second precoding matrix determined based on at least a first spatial direction, the first spatial direction calculated based on at least the first channel; determine a third precoding matrix for a third transmission site of the plurality of transmission sites, the third precoding matrix determined based at least on a composite spatial direction of effective channels associated with the first channel and a second channel between the second transmission site and the endpoint, each effective channel being a product in the frequency domain of a corresponding channel and a precoding matrix applied to data sent through the corresponding channel; and select a first transmission site from a plurality of transmission sites based on a quality of a first channel between the first transmission site and the endpoint; determine a first precoding matrix corresponding to the first transmission site, the first precoding matrix to be applied to data transmitted by the first transmission site to the endpoint; and determine a second precoding matrix corresponding to a second transmission site of the plurality of transmission sites, the second precoding matrix determined based on at least a first spatial direction, the first spatial direction calculated based on at least the first channel; determine a third precoding matrix for a third transmission site of the plurality of transmission sites, the third precoding matrix determined based at least on a composite spatial direction of effective channels associated with the first channel and a second channel between the second transmission site and the endpoint, each effective channel being a product in the frequency domain of a corresponding channel and a precoding matrix applied to data sent through the corresponding channel; and an interface coupled to the processor and configured to: communicate an indication of the first precoding matrix, an indication of the second precoding matrix, and an indication of the third precoding matrix to one or more of the plurality of transmission sites. communicate an indication of the first precoding matrix, an indication of the second precoding matrix, and an indication of the third precoding matrix to one or more of the plurality of transmission sites.