PUCCH format 0 signal processing with reduced complexity

A non-transitory, tangible computer readable storage medium storing a computer program that, when executed by a processor, causes the processor to:

• perform an Inverse Discrete Fourier Transform (IDFT) transform to obtain a time domain sequence from each received signal among a plurality of received signals, the plurality of signals correspondingly received at a plurality of antennas from a group of terminal devices over a physical uplink control channel (PUCCH) Format 0 (FMT0);
• determine a plurality of correlation power values from the time domain sequence;
• and
• for each terminal device in the group of terminal devices,
• extract, from the plurality of correlation power values, a maximum correlation power value corresponding to the terminal device,
• detect a payload of the terminal device based on an index corresponding to the maximum correlation power value, and
• utilize the detected payload for handling further communications with the terminal device.

A method performed at least in part by a processor, the method comprising:

• grouping of a plurality of terminal devices into a plurality of groups each including terminal devices of a same payload type among a plurality of payload types of a physical uplink control channel (PUCCH) Format 0 (FMT0);
• performing a transform from a frequency domain into a time domain to obtain a time domain sequence from each received signal among a plurality of received signals correspondingly received at a plurality of antennas from the group of terminal devices over the PUCCH FMT0;
• determining correlation power from the time domain sequence corresponding to each antenna among the plurality of antennas;
• combining the correlation power across the plurality of antennas, to obtain a plurality of correlation power values;
• and
• for each terminal device in each group among the plurality of groups,
• extracting, from the plurality of correlation power values and based on an initial cyclic shift that is unique to the terminal device, a set of correlation power values corresponding to the terminal device,
• determining, from the set of correlation power values, a maximum correlation power value corresponding to the terminal device,
• detecting a payload of the terminal device based on an index corresponding to the maximum correlation power value, and
• utilizing the detected payload for handling further communications with the terminal device.