a. Figure 7-2 Fixed wireless in rural areas. Mitigating Interference www.TechnicalPDF.com When transmissions use the same frequencies in the same locations or even next to one another, they can interfere with one another. For example, if people install Wi-Fi wireless equipment such as cordless telephones as well as microwave ovens that operate at 2.4GHz near each other, they may experience operability problems. These problems are caused by interference. Newer wireless protocols have the ability to hop between channels when they sense that other signals are in the same channel. Concerns about interference often lead to political conflicts between factions. This can occur when new uses for spectrum or new technologies are proposed. This occurred, as illustrated in the next section, when it was first proposed that white-space spectrum be allocated for other uses and also when LTE U was proposed. See Table 7-2, "LTE Types." Unlicensed Spectrum for "Super" Wi-Fi Governments specify portions of the spectrum for unlicensed services such as Wi-Fi and Bluetooth. Bluetooth is a wireless standard for communications between short distances such as wireless mouse or headsets linked to PCs and smartphones. Unlicensed spectrum is available free to companies that do not have to apply for a license to use it. This significantly lowers the cost of deploying service, but it doesn't mean the government does not regulate unlicensed spectrum. Every cellular and wireless device must be registered with the FCC and adhere to regulations on the amount of power emitted. Devices that emit high power may interfere with nearby devices. Moreover, the government can designate bands of spectrum as unlicensed for public benefit. In 2010, the FCC designated licensed spectrum formerly used in conjunction with analog TV as unlicensed spectrum to lower the cost of bringing new www.TechnicalPDF.com broadband services to rural areas. When broadcasters changed from analog to digital television broadcasts, The FCC auctioned off most of the 6MHz of that s