Enhancement for amplify-and-forward relay

A relay, comprising:

• a receiver configured to receive a signal from a source, wherein the signal comprises reference signal (RS) and data;
• a module configured to apply a Fast Fourier Transform (FFT) to the signal to generate RS symbols including the RS and data symbols including the data;
• a scheme selector configured to determine to equalize the signal based on a first carrier frequency offset and a second carrier frequency offset being aligned in direction, the first carrier frequency offset being between the source and the relay, the second carrier frequency offset being between the relay and a destination;
• an equalizer configured to equalize the signal based on the RS and the data, wherein the RS is used for equalization based on the RS symbols including the RS being input to an RS extraction module, the data is used for equalization without the data symbols including the data being input to the RS extraction module, and to equalize the signal, the equalizer is configured to equalize the data symbols and the RS symbols;
• an amplifier configured to amplify the equalized signal;
• and
• a transmitter configured to transmit the amplified signal to the destination.

An apparatus for wireless communication, comprising:

• means for receiving a signal from a source, wherein the signal comprises reference signal (RS) and data;
• means for applying Fast Fourier Transform (FFT) to the signal to generate RS symbols including the RS and data symbols including the data;
• means for determining to equalize the signal based on a first carrier frequency offset and a second carrier frequency offset being aligned in direction, the first carrier frequency offset being between the source and a relay, the second carrier frequency offset being between the relay and a destination;
• means for equalizing the signal based on the RS and the data, wherein the RS is used for equalization based on the RS symbols including the RS being input to an RS extraction module, the data is used for equalization without the data symbols including the data being input to the RS extraction module, and the means for equalizing the signal is configured to equalize the data symbols and the RS symbols;
• means for amplifying the equalized signal;
• and
• means for transmitting the amplified signal to the destination.

A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising code executable for a relay to:

• receive a signal from a source, wherein the signal comprises reference signal (RS) and data;
• apply Fast Fourier Transform (FFT) to the signal to generate RS symbols including the RS and data symbols including the data;
• determine to equalize the signal based on a first carrier frequency offset and a second carrier frequency offset being aligned in direction, the first carrier frequency offset being between the source and the relay, the second carrier frequency offset being between the relay and a destination;
• equalize the signal based on the RS and the data, wherein the RS is used for equalization based on the RS symbols including the RS being input to an RS extraction module, the data is used for equalization without the data symbols including the data being input to the RS extraction module, and to equalize the signal, the code executable for the relay is to equalize the data symbols and the RS symbols;
• amplify the equalized signal;
• and
• transmit the amplified signal to the destination.