chielite
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Hello, everyone,
Help needed
Q: The nonlinearity of a RF front-end can be modeled as a 7-order polynomial expression:
vo=k1*vi+k3*vi^3+k5*vi^5+k7*vi^7+.... For GSM1800, it has 374 channels with the channel width of 200kHz.
(1)Please find a theoretical expression for the 1-dB compression point, intercept point, and SFDR.
(2)Use GSM1800 as an example, please calculate the 1-dB compression point, intercept point, and SFDR for every channel.
(3)Please comment your results for GSM1800.
(4)If k1=33.996; k3=-5743.7; k5=-4.0016*1.e6; k7=-8.0760*1.e8 , please use the expressions you obtained above to plot some meaningful graph for each expression. Also, please propose your own solutions to reduce the effects.
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