Patent ID: 7660229

Claim:
A method for generating a structure in an orthogonal frequency division multiplexing (OFDM) communication system having a transmitter with a least one transmitting antenna, said method comprising: composing a frame with a time domain and a frequency domain, wherein the frame has a transmission time interval in the time domain and occupies a bandwidth in the frequency domain, said transmission time interval comprising of more than two orthogonal frequency division multiplexing symbols, wherein the transmission time interval comprises of seven orthogonal frequency division multiplexing symbols; locating a pilot signal from a first at least one transmitting antenna into at least two non-consecutive orthogonal frequency division multiplexing symbols of said frame, wherein the pilot signal from at least one transmitting antenna is located in a first and fifth OFDM symbols of the transmission time interval and a power level of the pilot signal is divided into the first and the fifth OFDM symbols in said transmission time interval; and transmitting said frame from said transmitter.