June 1978 | Technical Report NTIA TR-78-6
A Preliminary Estimate of the Effects of Spread–spectrum Interference on TV
Cite This Publication
John R. Juroshek, “A Preliminary Estimate of the Effects of Spread–spectrum Interference on TV,” Technical Report NTIA TR-78-6, U.S. Department of Commerce, National Telecommunications and Information Administration, Institute for Telecommunication Sciences, June 1978.
Abstract: The report examines the conditions under which spread–spectrum, land–mobile radio, and television can share spectrum. After a preliminary assessment, the report concludes that the interference caused by a constant amplitude, spread–spectrum system should be comparable to that caused by a conventional, narrowband, FM, land mobile signal of same total power, provided the spread–spectrum signal has an rf bandwidth less than 2 MHz. With spectrum spreads greater than 6 MHz, the spread–spectrum system should have some acivantage because of the out–of–band rejection capabilities of a TV receiver. A limited number of laboratory measurements are also described that support the conclusions of the report.
Keywords: interference; spread spectrum; television; land mobile radio (LMR)
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