Research Article
A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces
Table 1
Classification of TVWS cognitive devices and the FCC requirements.
| Type of device | Position | Geo-location and Database access requirement | Max transmission power allowance | Operation allowance on adjacent channels |
| Fixed | Fixed | Yes | =4W | No | Portable Mode I Device | Fixed or flexible | No | =100mW | Yes, if =40mW | Portable Mode II Device | Fixed or flexible | Yes | =100mW | =40mW | Sensing Device | Fixed or flexible | No | =50mW | =40mW |
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