Hämäläinen Matti (1994) Performance simulations and measurements for a digital receiver of a wideband radio channel measurement system. University of Oulu, Department of Electrical Engineering, 63 pages.

In this diploma thesis the theory of radio channel measurement and the operation of the stepping correlator of a wideband radio channel measurement system has been studied.

First, the radio channel, the parameters used to characterize it and the methods to evaluate them are briefly described. This work presents the principle of using stepping correlation and maximum lenght sequences to measure the impulse response of the radio channel.

This work presents the theoretical limits for the performance of the radio channel measurement system. The performance of the system has been studied by computer simulation, and the simulation results have been compared to the theoretical results. The performance has also been tested in laboratory conditions.

The demands for the stepping correlator will be satisfied with particular parameter settings. Simulation results and measurements of the delay resolution were similar. The dynamic range of the impulse response was dependent on the lenght of the spreading code and the reference value of the AGC. At the correlator we found miscorrelation spikes which were dependent on the spreading code. The dynamic range of the received power was better than when the sliding correlator was used. Also, the use of the IF filter added to the system afterwards is recommended.

Key words: radio channel measurement, stepping correlation, impulse response