Assessment of Interference to the DTT Service Generated by LTE Signals on Existing Head Amplifiers of Collective Distribution Systems: A Real Case Study

Interference Analysis between Mobile Radio and Digital Terrestrial Television in the Digital Dividend Spectrum

“…Unfortunately, BER, PER, and MER values usually are not available in consumer-grade DVB-T receivers. Therefore, the subjective method has been used in the interference analysis, and the most common metrics are the Picture Failure (PF), and the Subjective Failure Points (SFP) [21]. In order to be able to compare field measurement and simulation results, Protection Distance (PD) has also been calculated in Sec.…”

“…Due to the increased signal level, the amplifier will operate in its nonlinear range, and it will generate intermodulation products. A mixture of amplified desired signal together with interference and intermodulation products will reach the DVB-T input port [21]. Increased signal level will reduce DVB-T receiver selectivity, and also the nonlinear range could be reached.…”

“…After theoretical analysis and simulations, in order to measure the impact of the interfering LTE system on the DVB-T system, appropriate experimental laboratory test beds have been used and results have been presented in [17][18][19][20][21][22][23]. Results from laboratory and conducted field tests cannot be directly compared, due to different DTT standard and LTE parametrization used in those tests.…”

“…For example, high dependence of the digital TV signal power to interfering signal power ratio on the bandwidth of the interfering signal and applied FEC protection has been measured in [18]. However, significant PR value offset between channel 60, and channels 58-59 has been confirmed, both in laboratory [17][18][19][20][21][22][23] and conducted field test.…”

“…Taking into account the power density spectrum load dependency of an eNodeB signal, the present paper aims to provide an effective contribution in the comparison of the PR and PD results obtained from the field measurements with results obtained from the simulations [12][13][14], and results obtained from laboratory measurements [17][18][19][20][21][22][23].…”