... fluctuations. Advances in Measurement Systems3 94 2. MIMO testbeds Since MIMO systems begins to be a promising technology for increasing spectral efficiency in the new coming wireless communications systems, ... minPst,10minSubjective annoyance 1 0 min1 2 34 5 67 8 9 10 0.611.2(b) Subjective test 2.minuteannoyancePst,1minSubjective annoyance 1 minPst,10minSubjective annoyance 1 0 min1 ... 4.minuteannoyancePst,1minSubjective annoyance 1 minPst,10minSubjective annoyance 1 0 min12 3 45 6 78 9 10 11.522.5(e) Subjective test 5.minuteannoyancePst,1minSubjective annoyance 1 minPst,10minSubjective...