MRC Combined SNR

Problem

Return the combined output signal-to-noise ratio of maximal-ratio combining with unit signal power:

SNR = sum(g_i^2 / n_i)

where g_i are the channel gains and n_i the branch noise variances.

Hint

MRC adds the branch SNRs, so diversity grows the effective SNR.

case 1

in: [[1,1],[1,1]]

expected: 2

case 2

in: [[1,2],[1,1]]

expected: 5

case 3

in: [[1,1],[2,2]]

expected: 1

case 4

in: [[2,2],[4,4]]

expected: 2

Starter codePython

def mrc_snr(gains, noise_vars):
    # Your code here
    pass

4 test cases · run your code against them in the editor