| Popis: |
TVWS service is expected to be introduced in the near future. It should have to be capable of providing the broadcasting and TVWS services. However, it is difficult to share between broadcasting service and TVWS service in dense urban areas of the propagation environment. To date, there is no propagation prediction model for analysis of the two services. Recommendation ITU-R P.1546, propagation prediction method, is one of the candidates to analyze the both services. Recommendation ITU-R P.1546 is a point-to-area propagation prediction model, which is 30 ∼ 3000 MHz of the frequency band corresponding to the intervals 1 ∼ 1000 km distance. But it lacks accuracy for urban propagation model less than 1 km. |
