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Interference between television signals due to intermodulation in receiver front-ends

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1 Author(s)

With the introduction of Digital Television Broadcasting (DTV) the use of UHF Taboo channels and the first adjacent channels plus those already allotted to a community has become necessary due to spectrum scarcity. Most of the UHF Taboos are due to nonlinear interference mechanisms, which were, and still are characteristic of consumer receivers. Those mechanisms result in third and higher odd-order Intermodulation products some of which fall in the desired TV channel. Crossmodulation is a lesser problem than Intermodulation. Broadcasters need to understand these interference mechanisms to minimize their loss of service area. This knowledge may help them in choosing the future channel they will use for DTB broadcasting. This paper attempts to quantify these interference problems.

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Broadcasting, IEEE Transactions on  (Volume:51 ,  Issue: 1 )