Channel estimation device, channel estimation method, and wireless receiver

A wireless receiver that receives a plurality of pilot signals through a plurality of reception antennas, the pilot signals being modulated by a multicarrier method and being transmitted from a plurality of transmission antennas, the pilot signals being orthogonal to one another, and

• a channel estimation device that is used in the wireless receiver, the channel estimation device comprising:
• an estimatio unit that determines a channel estimate value for each unit time slot and each unit sub carrier;
• and
• an averaging unit that averages the channel estimate values over a plurality of time slots including a target time slot and a plurality of sub carriers including a target sub carrier, thereby determining an average channel estimate value, wherein the weighting factor of each of the channel estimate values to be averaged is represented by the product of a frequency component that varies with a channel variation in the frequency domain and a time component that varies with a channel variation in the time domain.

A channel estimation method comprising the steps of:

• transmitting a plurality of pilot signals through a plurality of transmission antennas, the pilot signals being modulated by a multicarrier method and being orthogonal to one another;
• receiving the transmitted pilot signals with a plurality of reception antennas;
• determining a channel estimate value for each unit time slot and each unit sub carrier, based on reception signals;
• and
• determining an average channel estimate value by averaging channel estimate values over a plurality of time slots including a target time slot and a plurality of sub carriers including a target sub carrier, wherein the weighting factor of each of the channel estimate values to be averaged is represented by the product of a frequency component that varies with a channel variation in the frequency domain and a time component that varies with a channel variation in the time domain.