Automatic compensation of transmit power of separate transmit chains in MIMO communication

摘要

Systems and methods are disclosed for receivers of transmit chains of a MIMO system to receive transmit power information and to compute channel characteristics of the transmit chains to enable dynamic adjustment of the transmit power on the transmit chain to optimize an overall data throughput while meeting a maximum emission limit, such as a regulatory limit on emitted power. The transmit power and the data rate on the transmit chains may be independently controlled. The receiver of the MIMO system may determine the new transmit power for the transmit chains from the computed channel characteristics and the current transmit power of the transmit chains. Alternatively, the receiver may transmit the computed channel characteristics of the transmit chains to the transmitter for the transmitter to determine the new transmit power for the transmit chains. The transmitter may use the new transmit power to transmit new data on the transmit chains.

主权项

1. A method for communicating over a multiple-input multiple-output (MIMO) channel, the method comprising:
receiving, by a receiver from a transmitter, information on a first transmit power over at least two transmit chains; determining, by the receiver, channel characteristics data including a data throughput for each of the at least two transmit chains; and determining, by the receiver, a second transmit power for at least one transmit chain of the at least two transmit chains using the first transmit power and at least one member of the group consisting of the channel characteristics data and a target throughput, wherein:
the second transmit power increases a total data throughput for the at least two transmit chains,a total transmit power including the second transmit power is below a maximum transmit power, anddetermining the second transmit power using the first transmit power and the target throughput includes:
selecting the target throughput corresponding to a throughput for a single-input single-output (SISO) channel,determining a desired channel characteristic corresponding to the target throughput,determining that the data throughput for the at least one transmit chain is lower than the target throughput, anddetermining the second transmit power for the at least one transmit chain based, at least in part, on a difference between the desired channel characteristic and the channel characteristics data.