Jonathan Alastair Gibbs

Spurious emission limits for mobile transmitters: an approach and results

This paper describes a Monte-Carlo method for evaluating discrete spurious emission limits. Building upon extensive data for receiver characteristics from an original CEPT (Conference of European Posts and Telecommunications) report, the technique was developed in order to determine the magnitude of the potential spurious emission problem by calculating the probability of interference. Parameters of existing receiving systems in different frequency bands are combined with realistic propagation models, log normal shadowing, of both the wanted and interfering signals, and likely future transmitter densities. Many Monte-Carlo trials are used to determine coverage losses due to interference from spurious emissions at different limit levels. The evaluation shows that conducted spurious emissions at the current ITU limit of (-16 dBm) will result in negligible probabilities of interference attributable to discrete spurious emissions even in dense urban environments.