Patent ID: 8824575

Claim:
A method comprising: providing a plurality of pilot signals in orthogonal frequency division multiplexing frames, each orthogonal frequency division multiplexing frame comprising a plurality of orthogonal frequency division multiplexing symbols; wherein providing comprises placing the plurality of pilot signals within at least one existing orthogonal frequency division multiplexing symbol of said plurality of orthogonal frequency division multiplexing symbols; multiplexing the plurality of pilot signals with first data within the at least one orthogonal frequency division multiplexing symbol; periodically interleaving the plurality of pilot signals with the first data, such that the plurality of pilot signals are interleaved with the first data in one resource block including the plurality of orthogonal frequency division multiplexing symbols; and placing the plurality of pilot signals within one orthogonal frequency division multiplexing symbol of the plurality of orthogonal frequency division multiplexing symbols, each orthogonal frequency division multiplexing frame having a time domain and a frequency domain, wherein said plurality of orthogonal frequency division multiplexing symbols occur one after another in direction of said time domain, and said plurality of pilot signals are placed at a time in said time domain within at least a part of a region in direction of the frequency domain.