Transmit diversity architecture with optimized power consumption and area for UMTS and LTE systems

摘要

A method and apparatus for providing total power from one transmit path. The method provides the steps of: selecting a transmit path and closing a first switch, located after a digital to analog converter. A second switch between the two transmit paths is then closed in order to provide for the use of at least one low-pass filter in each transmit path. The signal is then processed through the at least one low pass filter in each transmit path. The signal is then processed through at least one mixer in each transmit path. After the mixer, the signal is then processed through at least one driver amplifier in each transmit path, and one-half of the total power is allocated to each of two transmission paths. A third switch is then closed after the at least one power amplifier in each transmit path to force the half-power from one transmit path into one output.

主权项

1. An apparatus for transmit diversity in a multiple input multiple output (MIMO) network, comprising:
two input digital to analog converters, each accepting a data input; two transmit paths, each path comprising at least one low pass filter, at least one mixer, and at least one driver amplifier; a first switch connecting the two transmit paths before the driver amplifier; a second switch connecting the transmit paths after the driver amplifier; and further comprising a cross-switch composed of two switches installed in the transmit path of both transmit signals following the at least one driver amplifier and before a power amplifier in each transmit path.