Apparatus and methods for sampling rate conversion for wireless transceivers

An apparatus for sampling rate conversion in a transceiver, the apparatus comprising:

• means for sampling an input signal at a first sampling rate to obtain input signal samples at a second sampling rate lower than the first sampling rate;
• means for filtering the input signal samples using a plurality of parallel filters to obtain filtered samples at the second sampling rate;
• and
• means for interpolating the filtered samples at the second sampling rate to obtain output samples at a third sampling rate different from the first sampling rate of the input signal and also different from the second sampling rate of the filtered samples.

An apparatus for sampling rate conversion in a transceiver, the apparatus comprising:

• a sampler configured to sample an input signal at a first sampling rate to obtain input signal samples at a second sampling rate lower than the first sampling rate;
• a plurality of parallel filters configured to filter the input signal samples to obtain filtered samples at the second sampling rate;
• and
• an interpolator configured to interpolate the filtered samples at the second sampling rate to obtain output samples at a third sampling rate different from the first sampling rate of the input signal and also different from the second sampling rate of the filtered samples.

A computer program product, comprising:

• non-transitory computer-readable medium comprising:
• code for causing a computer to sample an input signal at a first sampling rate to obtain input signal samples at a second sampling rate lower than the first sampling rate in a transceiver;
• code for causing the computer to filter the input signal samples using a plurality of parallel filters to obtain filtered samples at the second sampling rate;
• and
• code for causing the computer to interpolate the filtered samples at the second sampling rate to obtain output samples at a third sampling rate different from the first sampling rate of the input signal and also different from the second sampling rate of the filtered samples.