ADDITIVE WHITE GAUSSIAN NOISE GENERATOR, PARTICULARLY FOR FACILITATING A BASE STATION BACKWARD CHANNEL PERFORMANCE TESTING BY CHANGING A FREQUENCY BAND OF AN AWGN GENERATED THROUGH AN EXISTING AWGN GENERATOR

摘要

PURPOSE: An AWGN(Additive White Gaussian Noise) generator is provided to generate an AWGN of a different frequency band by using the existing AWGN generator as it is. CONSTITUTION: An AWGN generator(100) generates an AWGN of a fixed specific frequency band. A local signal generator(200) generates a local signal varied according to a desired frequency band. A mixer(300) mixes the AWGN generated from the AWGN generator(100) and the local signal generated from the local signal generator(200) to extract a desired frequency band. A band filter(400) filters the frequency band extracted by the mixer(300) to remove a high-order AWGN and outputs an AWGN of a desired frequency band.