Patent ID: 8144827

Claim:
A method carried out by a communication system comprising a transmitter and a receiver for determining a residual frequency offset between the transmitter and the receiver in a transmission of data via a communication channel of the communication system, wherein: a message is transmitted from the transmitter to the receiver via the communication channel; the message comprises at least one short preamble, at least one long preamble and user data; the at least one long preamble comprises residual frequency offset determination information; and the residual frequency offset is determined by the receiver based on the residual frequency offset determination information by a recursive estimation algorithm based on a linear prediction method without using channel estimates of the communication channel, wherein the residual frequency offset is determined by the receiver based on the received residual frequency offset determination information which is given by L f , r , n = ( ∑ t = 1 N t ⁢ H f , r , t ⁢ Λ f , t , n ) ⁢ ⅇ j64ω ⁢ ⁢ n + V f , r , n wherein f denotes a subchannel index, t denotes a transmit antenna index, r denotes a receive antenna index, n is a time index, H f, r, t denotes the channel gain of the subchannel f established between transmit antenna t and receive antenna r, ω denotes the residual frequency offset, V f, r, n denotes the Average White Gaussian Noise sample and wherein Λ f , t , n = { 1 , if ⁢ ⁢ f ∈ { 8 , 44 , 58 } - 1 , if ⁢ ⁢ f = 22 is the frequency offset determination information.