Patent ID: 7366262

Claim:
A frequency estimation method of a multiband (MB)—orthogonal frequency division multiplexing (OFDM) ultra wide band (UWB) system using time frequency (TF) hopping strategy, wherein the frequency estimation method estimates a relative frequency offset for a center frequency f k by using the following equation: Δ ⁢ ⁢ F ^ rc = ( 1 2 ⁢ ⁢ π ⁢ ⁢ T ⁢ ⁢ tan - 1 ⁢ { ∑ n = 0 N - 1 ⁢ Im ⁢ { y 2 ⁢ n ⁢ y 1 ⁢ n * } ∑ n = 0 N - 1 ⁢ Re ⁢ { y 2 ⁢ n ⁢ y 1 ⁢ n * } } ) f k , wherein, T represents a sample interval between OFDM symbols having the same center frequency at f k , y 2n and y* 1n are two consecutive time-domain OFDM symbols having the same center frequency at f k , and f k is a center frequency of K th transmitted OFDM symbol.