Remote radio head unit system with wideband power amplifier and method

摘要

A remote radio head unit (RRU) system for multiple operating frequency bands, multi-channels, driven by a single or more wide band power amplifiers. More specifically, the present invention enables multiple-bands RRU to use fewer power amplifiers in order to reduce size and cost of the multi-band RRU. The present invention is based on the method of using duplexers and/or interference cancellation system technique to increase the isolation between the transmitter signal and receiver signal of the RRU.

主权项

1. An interference mitigation system for improving isolation between transmitters and receivers in wireless communications systems comprising:
a transmitter that transmits a transmit signal during a first time slot while a switch is in a first position; a feedback coupler that generates a feedback signal based on the transmit signal, wherein a characteristic of the feedback signal is representative of a characteristic of the transmit signal, an interference cancellation unit that processes the feedback signal to generate a processed signal; a receiver that receives an intake signal during a second time slot while the switch is in a second position, wherein the intake signal includes a first component from a signal received by the receiver and a second component from interference from the transmit signal, wherein whether the switch is in the first position or the second position is based on a time-division multiplexing technique; and a combiner that combines the intake signal received with the processed signal to generate a combined signal.