Main Effect of Mutual Interference in Radio Communication Systems Using Broad-Band Transmitters

Radio Systems Parameters and Performance Criteria Concerning Computation and Mitigation of EMI Effects

“…An Rx operating at a frequency / () is located at far distances of d w and ¿/ 2() from the two Tx. The most harmful back IMPs are shown in Figures 15 and 16 [14,49]. The same can be said of the influence of Tx 2 on Txj.…”

“…Usually the odd third IMP is dominant because of its (higher amplitude) lower IP and proximity to the tuned stage These equations apply if P { > P { , and h and 1 represent the higher and lower power products, respectively [48,49]. The n T order IP repre sents input power level PIP n in dBm at which the (line) curve of linear output and the n T order IMD intersect.…”

“…At P l dB the amplifier stage small-signal power gain G p is reduced by 1 dB as shown in Figure 7 or the conversion loss of a frequency converter stage is enhanced by 1 dB. It can be evaluated from Tay lor-Fourier series coefficients or from several empirical parameters related to broadband desensitization effects [49]. For saturated amplifier or frequency converter stages, the IMP power level computation is complex and unpredictable.…”

“…The effects of the IMP power levels can be neglected when the interfering STS signal power levels are significantly less than the amplifier stage P x dBc . The second-order IMP power level is usually atten uated by the Rx front-end filters as shown in Section 3.2.4 [49,87]. (23) and (24) the P ÌMM) a t t n e ampli fier output is at least 40 dB less than the output P f , and from Eqs.…”

“…These IMP effects may generate Rx harmful ACI as shown in Figure 13, especially in loaded urban and semiurban regions, due to the proliferation of radio systems and users [37,49]. These IMP effects may generate Rx harmful ACI as shown in Figure 13, especially in loaded urban and semiurban regions, due to the proliferation of radio systems and users [37,49].…”