Which of these metrics are dependent on link conditions: CINR, SNR, or BER? Evaluate the pros and cons of using the SNR and signal - to - interference - noise ratio ( SINR ) for estimating signal quality versus using the absolute value of the signal power. Consider single and multiple antenna systems. Can interference be included as " noise " in SNR, or should it be measured separately as in SINR? Since spread spectrum systems suppress interference, is SINR relevant for such systems? How can one measure SNR or channel quality without including interference? Hint: Will it be possible to measure the channel impulse response of known and unknown interference sources?