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Method for narrow-band channel estimation

The measurements of the spatio temporal directional channel at 40GHz are carried out by using the 40GHz array antenna of four antenna elements in broad-scale (e.g. 500 - 1000MHz). The broad-scale radio channel is excited by a test signal of a certain bandwidth piecewise with stepped LO frequencies. The partly measured channels are subsequently composed in the frequency domain whereby broadband channel measurements arise. For exciting channels a multi-sine signal is applied as the transmit signal.

The discontinuity between the channel transfer functions between the partly measured frequency bands may not be excluded and these can be eliminated by the system calibration and by utilizing appropriate signal processing. The estimation of the channel parameter is accomplished after measurements off-line. The main advantage of this channel measurement concept lies in the broadband spatio temporal directional channel characterisation with small hardware investment. The relative large measurement repeat frequency is contrarily the limitation of this concept. Thus, this measurement concept represents the trade-off between the frequency sweeping method and the broadband correlation method in terms of the performance and the cost.

More information on the OBANET project can be found on the project’ s website: .

Reported by

Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut
Einsteinufer 37
10587 Berlin
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