Interference-aware decision-directed frequency and phase tracking for coherent demodulation in narrowband wireless communication systems

A device for estimating carrier frequency offset, the device comprising:

• a memory configured to store a plurality of data symbols;
• and
• at least one processor configured to:
• obtain a channel estimate and an estimated carrier frequency offset based on a result of an interference detection indicating whether interference is detected in the plurality of data symbols,
• obtain a data symbol of the plurality of data symbols,
• obtain an equalized compensated data symbol corresponding to the data symbol based on the estimated carrier frequency offset and the channel estimate, and
• demodulate and decode the equalized compensated data symbol to obtain decoded data.

A communication method for operating a communication device, the communication method being performed by at least one processor and comprising:

• receiving, by a receiver from a transmitter, a plurality of data symbols;
• obtaining a channel estimate and an estimated carrier frequency offset based on a result of an interference detection indicating whether interference is detected in the plurality of data symbols;
• obtaining a data symbol from among the plurality of data symbols;
• obtaining a compensated data symbol corresponding to the data symbol based on the estimated carrier frequency offset;
• obtaining an equalized compensated data symbol by performing channel equalization on the compensated data symbol based on the channel estimate;
• and
• demodulating and decoding the equalized compensated data symbol to obtain decoded data.

A method for estimating carrier frequency offset, the method being performed by at least one processor and comprising:

• receiving, by a receiver from a transmitter, a plurality of data symbols;
• obtaining a channel estimate and an estimated carrier frequency offset based on a result of an interference detection indicating whether interference is detected in the plurality of data symbols;
• obtaining a data symbol of the plurality of data symbols;
• obtaining an equalized compensated data symbol corresponding to the data symbol based on the estimated carrier frequency offset and the channel estimate;
• and
• demodulating and decoding the equalized compensated data symbol to obtain decoded data.