Modem chip for performing data-based interference whitening and operating method thereof

An operating method of a semiconductor chip, the operating method comprising:

• receiving a reference signal and a data signal allocated a plurality of second REs, the reference signal being allocated a plurality of first resource elements (REs), and the data signal being allocated a plurality of second REs;
• generating a first noise plus interference vector for a channel of the reference signal, based on the reference signal and a channel estimate matrix for the channel of the reference signal;
• generating a first filter, based on the first noise plus interference vector, the first filter configured to filter interference noise in the data signal;
• generating a plurality of estimate values for data corresponding to the plurality of second REs allocated to the data signal by performing interference filtering on the data signal, based on the first filter;
• obtaining at least one sample RE among the plurality of second REs, based on sample selection information corresponding to a channel environment of a reference signal;
• obtaining at least one sample estimate value corresponding to the at least one sample RE among the plurality of estimate values;
• and
• generating a second filter based on the at least one sample estimate value.

A semiconductor chip comprising:

• a transceiver configured to receive a demodulation reference signal (DMRS) and a physical downlink shared channel (PDSCH), the DMRS being allocated a plurality of first resource elements (REs), and the PDSCH being allocated a plurality of second REs;
• and
• a processor configured to:
• generate a first noise plus interference vector for a channel of the DMRS, based on the DMRS and a channel estimate matrix for the channel of the DMRS,
• generate a first filter, based on the first noise plus interference vector, the first filter configured to filter interference noise in the PDSCH,
• generate a plurality of estimate values respectively corresponding to the plurality of second REs allocated to the PDSCH, by performing interference filtering on the PDSCH, based on the first filter,
• obtain at least one sample RE among the plurality of second REs, based on sample selection information comprising at least one of delay spread information, Doppler frequency information or information about a number of first REs in one resource block (RB) of a reference signal receiving through the transceiver,
• obtain at least one sample estimate value corresponding to the at least one sample RE among the plurality of estimate values,
• generate a second filter, based on the at least one sample estimate value and a second noise plus interference vector for the PDSCH, the second noise plus interference vector being generated based on the at least one sample estimate value, and
• generate a plurality of data values respectively corresponding to the plurality of second REs by performing, based on the second filter, filtering on interference in the PDSCH.