High Level Noise Impact on Image Data of Yagi Antenna Smart TV Transmitting at 18- 24 Ghz
Keywords:SNR, Digital TV, Environmental noise, Microwave Frequencies, QoS
Noise had been known to have great impact on the quality of service (QoS) in digital Television transmission
network and in wireless communication systems during data communication. This is because noise reduces
Signal to Noise ratio (SNR) in Wi-Fi and cellular networks, and in television and radio broadcasting systems.
Yagi antenna had been in use on Television network and in wireless systems, because it provides focused
coverage and minimize interference especially in location where signal strength is weak. The effect of high
impact noise at very close range on microwave signal have not been investigated to include non-convectional
sources of noise such as a high-noise source (?80 dB). The measurement of high level noise impact on digital
TV transmission at microwave frequency with Yagi antenna transmission at microwave frequency up links (18 -
24 GHz) and downlink (474 to 842 MHz) band was taken using Digital Transmission Television (DST)
equipment, a GOTV decoder, a Yagi antenna, a high-noise source (?80 dB), a power source, a smart television
monitor, and a sound meter. Twenty stations within the microwave frequency range were selected for the study.
The results indicated that signal loss caused by excessive environmental noise adversely affected signal quality
on the Smart TV. It was concluded that high noise level greater than 80 dB may have detrimental effect leading
to decrease in signal quality (loss of picture) during evening hours and on rainy days.