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When wireless base station antennas share a tower or site, the electromagnetic compatibility should be considered, one of which is to calculate the antenna isolation. For horizontal isolation, calculation is based on antenna pattern and the traditional far-field boundary is d>2D2/λ. In practical scenarios of antenna co-site, however, antenna distance cannot fit these boundary conditions. Regarding...
This paper analyzed the interference WCDMA signals to digital terrestrial broadcast television receiver, demonstrated that since WCDMA transmitting power control (TPC) mechanisms, in the most serious interference cases, the uplink or downlink interference will be dominant respectively, so in the interference analysis, uplink and downlink interference should be treat respectively, i.e. the case of...
Direct digital frequency modulated (DDFM) signal, which certainly on the direct digital synthesizers is widely used in EMC test and measurement. This paper analytically expressed the frequency spectrum of DDFM signal. Works of this paper also include: modifies the approximate formula for first order harmonic distortion (FHD) and discovers restrictions.
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