Apparatus for performing channel estimation in a receiving device

An apparatus for performing channel estimation on a time-domain received signal through a channel, and a frequency-domain received signal corresponding to the time-domain received signal, the apparatus comprising:

• a time-domain estimating circuit to perform a channel estimation on the time-domain received signal in the time domain to output a time-domain estimated signal representing an estimation of characteristic of the channel;
• a second frequency-domain converting circuit to convert the time-domain estimated signal into a frequency-domain estimated signal;
• an error computing circuit to produce a frequency-domain error signal based on the frequency-domain estimated signal and the frequency-domain received signal;
• a third time-domain converting circuit to convert the frequency-domain error signal into a time-domain error signal;
• a compensation circuit to compensate the time-domain estimated signal in the time domain using the time-domain error signal so as to produce a time-domain channel estimation signal representative of the characteristic of the channel;
• and
• a sixth frequency-domain converting circuit to convert the time-domain channel estimation signal to a final channel estimation signal.

An apparatus for performing channel estimation on a frequency-domain received signal over a channel, the apparatus comprising:

• a frequency-domain estimating circuit to perform a channel estimation on the frequency-domain received signal in the frequency domain to output a frequency-domain estimated signal representing an estimation of characteristic of the channel;
• an error computing circuit to produce an frequency-domain error signal based on the frequency-domain estimated signal and the frequency-domain received signal;
• and
• a compensation circuit to compensate the frequency-domain estimated signal using the frequency-domain error signal so as to produce a final channel estimation signal representative the characteristic of the channel.