Generating multi-channel outputs simultaneously in a receiver using polyphase filter

A method comprising:

• filtering an input signal having N channels by a polyphase filter to generate N filtered signals;
• and
• extracting one or more channel outputs from the N filtered signal based on one or more phasors corresponding to the one or more channel outputs;
• wherein extracting comprises providing the one or more channel outputs using the one or more phasors provided by a phasor LUT by one or more multiplier-accumulators.

An apparatus comprising:

• a polyphase filter to generate N filtered signals from an input signal having N channels;
• and
• a channel extractor coupled to the polyphase filter to extract one or more channel outputs from the N filtered signal based on one or more phasors corresponding to the one or more channel outputs;
• wherein the polyphase filter comprises a non-recursive filter having P taps to generate the N filtered signals, the P taps corresponding to P coefficients arranged in a two-dimensional array.

An apparatus comprising:

• a polyphase filter to generate N filtered signals from an input signal having N channels;
• and
• a channel extractor coupled to the polyphase filter to extract one or more channel outputs from the N filtered signal based on one or more phasors corresponding to the one or more channel outputs;
• wherein the channel extractor comprises one or more multiplier-accumulator coupled to the polyphase filter and a phasor look-up table (LUT) to provide the one or more channel outputs using the one or more phasors provided by the phasor LUT.

A system comprising:

• a lowpass filter to filter a multi-channel received signal having N channels, the low-pass filter generating an input signal having the N channels;
• a digitizer coupled to the lowpass filter to digitize the input signal;
• and
• an output generator coupled to the digitizer to generate one or more channel outputs from the input signal, the output generator comprising:
• a polyphase filter to generate N filtered signals from the input signal, and
• a channel extractor coupled to the polyphase filter to extract the one or more channel outputs from the N filtered signal based on one or more phasors corresponding to the one or more channel outputs;
• wherein the polyphase filter comprises a non-recursive filter having P taps to generate the N filtered signals, the P taps corresponding to P coefficients arranged in a two-dimensional array.

A system comprising:

• a lowpass filter to filter a multi-channel received signal having N channels, the low-pass filter generating an input signal having the N channels;
• and
• a digitizer coupled to the lowpass filter to digitize the input signal;
• and
• an output generator coupled to the digitizer to generate one or more channel outputs from the input signal, the output generator comprising:
• a polyphase filter to generate N filtered signals from the input signal, and
• a channel extractor coupled to the polyphase filter to extract the one or more channel outputs from the N filtered signal based on one or more phasors corresponding to the one or more channel outputs;
• wherein the channel extractor comprises one or more multiplier-accumulator coupled to the polyphase filter and a phasor look-up table (LUT) to provide the one or more channel outputs using the one or more phasors provided by the phasor LUT.