Abstract
This paper analyzes TV white space (TVWS) availability in Japan by estimating the amount and distribution of TVWSs across Japan and comparing them with those across the USA. While TVWS regulation is still under discussion in Japan, the expected availability is likely to be more encouraging than that in the USA. Japanese metropolitan areas tend to have more available channels than those in the USA. Including the Tokyo metropolitan area which is the most populated area in Japan, 84.3% of areas (66.7% of the population) may expect greater than 100-MHz TVWSs. The Tokyo metropolitan area is also relatively unaffected by restricted use of the adjacent channel or increase in separation distance.
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