Sampling Rate Conversion for Arbitrary Ratio Using Transposed Linear Interpolation and Cic Filter

1. INTRODUCTION In multistandard receivers, the hardware should be configurable or programmable for the reception of different types of signals having different symbol rates. After the AD conversion, utilizing commonly the delta-sigma AD-conversion principle and high oversampling ratio, the sampling rate is reduced to be a low integer multiple of the symbol rate. In this decimation, the desired channel is preserved and other channels and noise are attenuated. The problem is in that the needed decimation factor can be a difficult fractional number or even an irrational number and, for instance, FIR filters used for integer or fractional decimation cannot be efficiently utilized. Decimation factor R in general form is given with