Method and apparatus for channel estimation and equalization in QAM-FBMC system

A method for signal reception in a receiver, the method comprising:

• receiving, from a transmitter, channel measurement information;
• acquiring information related to channel based on the received channel measurement information;
• transmitting, to the transmitter, the acquired information related to channel;
• receiving, from the transmitter, information on a first filter and a second filter to be used for signal reception based on the acquired information related to channel;
• estimating, if a performance difference is present between the first filter and the second filter, channel information of subcarriers associated with the filter having higher performance among the first filter and the second filter;
• determining channel information of subcarriers associated with the filter having lower performance by utilizing the estimated channel information;
• and
• detecting signal based on the estimated channel information and derived determined channel information.

A transmitter comprising:

• a transceiver configured to transmit and receive signals;
• and
• at least one processor configured to:
• transmit, to a receiver, channel measurement information,
• receive, from the receiver, information related to channel based on the channel measurement information,
• select a first filter and a second filter to be used for signal transmission according to the received information related to channel,
• map, if no performance difference is present between the first filter and the second filter, reference symbols evenly to subcarriers associated with the first filter and subcarriers associated with the second filter,
• map, if a performance difference is present between the first filter and the second filter, reference symbols preferentially to subcarriers associated with the transmitting filter with higher performance, and
• transmit a transmit signal having the mapped reference symbols.

A receiver comprising:

• a transceiver to transmit and receive signals;
• and
• at least one processor configured to:
• receive, from a transmitter, channel measurement information,
• acquire information related to channel based on the received channel measurement information,
• transmit, to the transmitter, the acquired information related to channel to the transmitter,
• receive, from the transmitter, information on a first filter and a second filter to be used for signal reception based on the acquired information related to channel,
• estimate, if a performance difference is present between the first filter and the second filter, channel information of subcarriers associated with the filter having higher performance among the first filter and the second filter,
• determine channel information of subcarriers associated with the filter having lower performance by utilizing the estimated channel information, and
• detect signal based on the estimated channel information and determined channel information.