Measurements of Effective Radiated Powers

摘要

It can be seen that for signal density predictions and tests for conformance with statistical specifications, the analytic model described in this paper seems quite adequate. A field measurement technique could employ pulse counting and record the required pulse patterns directly. If many runs are made, the standard deviations could also be included. Thus, the patterns could be placed on tape in a form suitable for use by a computer programmed to solve signal density problems. It is of little consequence to the model whether a peak or a null appears at a specific angle. Detailed pattern plots would not be required, alleviating the requirement for precision in determining azimuth angles. Therefore, measurement accuracy of this parameter seems not to be markedly significant for signal density predictions, simplifying the measurement technique and the method for data presentation. If azimuth accuracy is preserved, the measurements will be useful to engineers involved in siting problems and the data can still be converted to the form described in this paper. Finally, the statistical model provides the system planner with a definite quantitative estimate of the confidence that can be placed on the measured data. This will provide a sound engineering basis for equipment design and will also point clearly toward those areas where improved measurement techniques and measurement equipment are required. Incidentally, it will also indicate where relatively crude techniques (whose errors are known) are acceptable. (Author)