Characterizing the Subjective Performance of the TIA/EIA-136 Mobile Communications System

"This work evaluated the subjective performance of the TIA/EIA- 136 cellular system based on computer simulation of the forward link, which was used to obtain speech samples for listening opinion tests. The language under evaluation was Portuguese from Brazil. The speech quality of the system was quantified through comparison mean opinion scores (CMOS) obtained from the application of the comparative category rating (CCR) method. Several mobile channel conditions were tested under different conditions of input speech (with and without environmental noise) and in the presence or absence of equalization in the receiver side."