Which of the following is not used to control interference at RF?(a) Programmable digital notch filters(b) Active cancellation(c) Frequency separation(d) Antenna separationThe question was asked by my school teacher while I was bunking the class.My doubt is from RF and IF Processing Tradeoffs topic in chapter Technology Tradeoffs in Software Defined Radio of Cognitive Radio

Which of the following is not used to control interference at RF?(a) P

1.	Which of the following is not used to control interference at RF?(a) Programmable digital notch filters(b) Active cancellation(c) Frequency separation(d) Antenna separationThe question was asked by my school teacher while I was bunking the class.My doubt is from RF and IF Processing Tradeoffs topic in chapter Technology Tradeoffs in Software Defined Radio of Cognitive Radio
Answer» Right OPTION is (a) PROGRAMMABLE digital notch filters To explain I would say: Physical antenna SEPARATION, frequency separation, programmable analog notch filters and active CANCELLATION are the steps used to control INTERFERENCE at RF.

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