Co-phasing of transmissions from multiple infrastructure nodes

摘要

Briefly, in accordance with one or more embodiments, mobile station or user equipment receives pilot signals from two or more infrastructure nodes in a distributed antenna system, and calculates phase or timing information, or combinations thereof, from the pilot signals. The mobile station feeds back the phase or timing information, or combinations thereof, to the infrastructure nodes, and then receives one or more subsequent transmissions from the infrastructure nodes with phase shift or timing adjustments, or combinations thereof, calculated by the infrastructure nodes and applied to the spatial streams transmitted by the infrastructure nodes.

主权项

1. A method, comprising:
receiving pilot signals from two or more infrastructure nodes; calculating adjustments to apply to one or more spatial streams of the infrastructure nodes, wherein the adjustments comprise phase shift or timing adjustments, or combinations thereof, applied per subcarrier as a linear function of subcarrier frequency for one or more sub-bands of one or more of the spatial streams to align the two more spatial streams and allow simultaneous service by the two or more infrastructure nodes; transmitting the calculated adjustments to the infrastructure nodes; and receiving one or more subsequent coordinated multipoint transmissions from the two or more infrastructure nodes with the adjustments applied to one or more of the spatial streams received from the infrastructure nodes.