Question

Which of the following is a challenge for direct conversion receiver?

(a) GaAs circuitry

(b) CMOS circuitry

(c) LO leakage and DC bias

(d) Difference between CMOS and GaAs circuitry

The question was posed to me in semester exam.

My enquiry is from RF and IF Processing Tradeoffs topic in chapter Technology Tradeoffs in Software Defined Radio of Cognitive Radio

Answer 1

The correct choice is (c) LO leakage and DC bias

To explain: LO leakage and DC bias are a challenge for wide band digital signal processing using direct conversion receiver.