Patent ID: 8665983

Claim:
An apparatus of cooperative MIMO OFDM using non-data-aided timing synchronization, comprising at least two transmitters, each of said transmitters being assigned with subcarriers, said subcarriers having an equal space between every neighboring two of said subcarriers, each of said transmitters having a unique space in said subcarriers, each of said transmitters obtaining different signal cycle by transforming said subcarriers through inverse Fourier transform to obtain random time domain orthogonal frequency-division multiplexing (OFDM) signals, wherein majority vote refinement (MVR) is processed to a plurality of timing synchronization points estimated by a receiver of said transmitters; and wherein said apparatus uses any number of the random OFDM signals to continuously process the timing synchronization, wherein said subcarriers are assigned to any two of said transmitters in a way expressed as follows: Ω m ={k m d m +r m :∀k m ∈N∪{ 0}}, Ω l ={k l d l +r l :∀k l ∈N∪{ 0}}, d m , d l ∈N, 0 ≦r m <d m , 0≦ r l <d l , wherein Ω m and Ω l are two sets of said subcarriers assigned to said m-th transmitter and said l-th transmitter, respectively; and N is the set of natural numbers; wherein d m and d l are said spaces assigned to said m-th transmitter and said l-th transmitter, respectively.