SAMPLING RATE CONVERTING METHODS, SAMPLING RATE CONVERTING DEVICES, AND RECEIVER AND TRANSMITTER HAVING THE SAME IN A BANDWIDTH-LIMITED COMMUNICATION SYSTEM

摘要

Sample rate conversion method of a communications system in which the frequency band is limited and generates a first output signal having a second sampling frequency and interpolating the input signal having a first sampling frequency to the up-sampling rate. First filters the output signal to a low pass filter that reflects the frequency band limiting properties of the pulse shaping filter to generate a second output signal. The down-sampled by a second output signal to a down-sampling rate to generate a third output signal having a third sampling frequency. A pulse shaping filter (PSF) and the sampling rate converter (SRC) is in the bandwidth-limited communication systems that exist at the same time, the inside of a pulse shaping filter (PSF) and the sampling rate converter (SRC) coupled to the front end of the sampling rate converter (SRC) the convolution of the low pass filter (LPF) by replacing a filter it is possible to improve the performance of the sampling rate converter (SRC) and at the same time reducing the hardware complexity (or computation).