Question

Which among the following is an expression for spectral efficiency?

(a) η=\(\frac{R_sk}{B}\). where Rs is the symbol rate, B is the bandwidth, K is the number of bits per symbol

(b) η=RsB where Rs is the symbol rate, B is the bandwidth, K is the number of bits per symbol

(c) η=\(\frac{Bk}{R_s}\)where Rs is the symbol rate, B is the bandwidth, K is the number of bits per symbol

(d) η=BK where B is the bandwidth

This question was addressed to me in class test.

Question is from Techniques in section Cognitive Techniques of Cognitive Radio

Answer 1

Correct choice is (a) η=\(\frac{R_sk}{B}\). where Rs is the symbol rate, B is the bandwidth, K is the number of bits per symbol

Best explanation: Spectral efficiency is given by the product of number of bits per symbol and symbol rate divided by bandwidth. It helps in achieving balance between symbol rate and modulation type.