Timing-frequency offset and carrier-frequency offset estimations for multi-carrier modulated signals using pilot tones

A method for processing a multi-carrier modulated signal having at least two pilot tones and a cyclic prefix, the method comprising:

• (a) generating a pilot-based timing-frequency offset estimate based on the at least two pilot tones;
• (b) generating a prefix-based timing-frequency offset estimate based on the cyclic prefix;
• (c) combining the pilot-based timing-frequency offset estimate and the prefix-based timing-frequency offset estimate to generate a combined timing-frequency offset estimate;
• and
• (d) adjusting the multi-carrier modulated signal based on the combined timing-frequency offset estimate.

A receiver for processing a multi-carrier modulated signal having at least two pilot tones and a cyclic prefix, the receiver comprising:

• a timing-frequency offset estimator adapted to:
• (a) generate a pilot-based timing-frequency offset estimate based on the at least two pilot tones;
• (b) generate a prefix-based timing-frequency offset estimate based on the cyclic prefix;
• and
• (c) combine the pilot-based timing-frequency offset estimate and the prefix-based timing-frequency offset estimate to generate a combined timing-frequency offset estimate;
• and
• a timing-frequency offset compensator adapted to adjust the multi-carrier modulated signal based on the combined timing-frequency offset estimate.