When transmitter and receiver moves towards each other, the magnitude of frequency shift is(a) Positive(b) Negative(c) Zero(d) InfinityI have been asked this question by my school principal while I was bunking the class.This key question is from Signal Time Spreading in division Fading Channels of Digital Communications

When transmitter and receiver moves towards each other, the magnitude

1.	When transmitter and receiver moves towards each other, the magnitude of frequency shift is(a) Positive(b) Negative(c) Zero(d) InfinityI have been asked this question by my school principal while I was bunking the class.This key question is from Signal Time Spreading in division Fading Channels of Digital Communications
Answer» Right option is (a) POSITIVE Explanation: When transmitter and RECEIVER moves TOWARDS each other, the magnitude of frequency shift is positive, where as if it moves away from each other then it is negative.

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