Adaptive multiple feedback interference cancellation scheme for CMMB radio repeaters

摘要

This paper presents a multiple feedback interference cancellation scheme based on the Partitioned Block Frequency-Domain LMS algorithm for a CMMB (China Mobile Multimedia Broadcasting) radio repeater when the isolation between the transmitting and receiving antennas is much larger than the gain of the radio repeater to provide a larger coverage range. If the large feedback signals received at the receiving antenna can't be suppressed by the repeater, the repeater will get into a vicious circle of sustained enlargement until it goes into self-oscillation. The performance evaluation of the designed scheme is illustrated with simulation results.