700 MHz Band LTE Uplink Interference to DTT Reception System Cabling

Abstract

This paper studies the shielded screening attenuation of consumer-grade digital terrestrial television (DTT) antenna coaxial cables and presents a measurement campaign to determine their vulnerability to interference originating from uplink traffic of a nearby Long Term Evolution (LTE) user equipment (UE) operating on the 700 MHz frequency band. The interference scenario is novel as the LTE uplink traffic on the 700 MHz band is significantly closer in frequency to the DTT transmissions than previously with the 800 MHz LTE. The measurement results show that the antenna coaxial cables with weakest shielded screening attenuation can be interfered in realistic usage scenarios when the LTE UE uplink traffic is transmitted on the lowest frequencies in the 700 MHz band and the DTT channel highest in frequency is used.

Adjacent-Channel Compatibility Analysis of International Mobile Telecommunications Downlink and Digital Terrestrial Television Broadcasting Reception in the 470–694 MHz Frequency Band Using Monte Carlo Simulation

“…The results of [28] indicated that interfering LTE-DL signals have a minimal impact on portable DTTB indoor reception with various configurations in adjacent bands. In [29], the study measured the shielding performance of consumer DTTB antenna cables in the laboratory, finding variations of up to 60 dB. It assessed the susceptibility to interference from LTE uplink traffic in the 700 MHz band.…”

Co-Channel Compatibility Analysis of IMT Networks and Digital Terrestrial Television Broadcasting in the Frequency Range 470–694 MHz Based on Monte Carlo Simulation

“…Ref. [35] conducted laboratory measurements to investigate LTE uplink interference on coaxial cables connecting TV sets to digital TV aerial sockets. Ref.…”