Apparatus, method, and computer program

An apparatus comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:

• receive, from a device, a response signal to an activation signal over a channel;
• generate a first vector in a time domain including samples of the response signal;
• perform a transformation of the first vector in the time domain to obtain a second vector yi in a frequency domain including pilot symbols and data symbols;
• estimate a channel response Hi of the channel based on the pilot symbols;
• equalize the data symbols based on the channel response Hi;
• determine a waveform of the response signal, from among a plurality of waveforms the apparatus is configurable to handle, based on configuration information;
• and
• process the equalized data symbols based on the determined waveform.