A goal of the high fidelity channel measurement campaign is to be able to parameterize the channel by its constituent rays which are made up of time of arrivals (TOAs), Doppler frequencies (DFs), direction of departures (DODs) from the base, direction of arrivals (DOAs) at the mobile, and the gains of each ray. The reason for this parameterization is that these quantities enable, amongst other things, the testing of arrays of a different size/configuration than what was used for the data collection effort. In other words, once these parameters are estimated channels can be generated for arbitrary arrays at both the base and the mobile as long as the physical location of the arrays does not significantly exceed the locations of the antennas used for the measurements. In addition to providing the details of the parameter estimation, this paper also describes the design of the transmit waveforms used for the channel measurement campaign. The waveforms are designed to simplify the parameter estimation and also have an extremely low peak to average power ratio (PAPR). The very low PAPR enables the power amplifiers to be driven at a higher power than would otherwise be possible with OFDM.
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