Hybrid filter bank analog/digital converter

A system for converting a continuous-time signal to a discrete-time signal comprising:

• a bank of continuous-time analysis filters for partitioning a continuous-time wideband input signal into subband signals;
• a bank of analog-to-digital converters for quantizing the subband signals;
• a bank of rate changers for adjusting the data rate of the subband signals;
• and
• a bank of discrete-time synthesis filters for reconstructing the subband signals such that signals are generated which are the discrete-time approximation of the continuous-time subband signals.

A method for converting a signal between continuous-time and discrete-time comprising:

• partitioning a wideband input signal into first subband signals at an analysis filter bank;
• converting the first subband signals to second subband signals at a bank of analog/digital converters;
• and
• reconstructing the second subband signals at a synthesis filter bank such that third subband signals are generated which are the converted approximation of the first subband signals and wherein one of the analysis bank and synthesis bank comprises continuous-time filters and the other comprises discrete-time filters.

A method for converting a continuous-time signal to a discrete-time signal comprising the steps of:

• partitioning a continuous-time wideband input signal into subband signals at a bank of continuous-time analysis filters:
• quantizing the subband signals at a bank of analog-to-digital converters;
• adjusting the data rate of the subband signals at a bank of rate changers;
• and
• reconstructing the subband signals at a bank of discrete-time synthesis filters for generating signals which are the discrete-time approximation of the continuous-time subband signals.

In a data processing system, a method of generating a system for converting a signal between discrete-time and continuous-time comprising:

• estimating a bank of continuous-time filters;
• implementing the bank of continuous-time filters;
• measuring the behavior of the continuous-time filter bank implementation;
• estimating a bank of discrete-time filters to compensate for non-ideal behavior in the continuous-time filter bank implementation;
• and
• adjusting the discrete-time filters such that the system distortion function converges on a perfect delay and such that the system aliasing function converges on zero.