83. Speech Quality Index – SQI

TEMS products offer the quality measure SQI (Speech Quality Index) for estimating the downlink speech quality in a GSM, WCDMA, or CDMA cellular network as perceived by a human listener.

Computing SQI for GSM and WCDMA requires data collected with Sony Ericsson phones. SQI for CDMA can be based on data from any CDMA phone that is connectable in TEMS Investigation.

This chapter examines the workings of the SQI algorithm. See also the document "Speech Quality Measurement with SQI" which is included in the TEMS Investigation documentation package.