Implementation of Self Interference Cancellation for WCDMA Repeater

In this paper, the FPGA (Field Programmable Gate Array) implementation of self interference cancellation technique based on an adaptive LMS (Least Mean Square) algorithm is presented. By using the FPGA Virtex@6 HW module, the field data measured through a RF repeater is adopted to improve a signal quality and to reduce oscillation of the system due to the feedback interference signal coming from transmit antenna of a WCDMA radio repeater. As a result, the proposed module, which was simulated by Xilinx System Generator, a high efficiency and achievs the a similar performance in comparison with the implementation result. Because of FPGA implementation, the designed technique offers more flexibility than existing methods.