% plotGrid(GRIDSIZE,CSIRSIND) plots the carrier grid of size GRIDSIZE % by populating the grid with CSI-RS symbols of multiple resources % indicated by a cell array of CSI-RS indices CSIRSIND. For iOS 9.3 and above: Go into Settings > Cellular > Cellular Data Options > Enable LTE and turn LTE to Off. This will enable you to see what network youre connected to (2G, 3G, 4G, LTE, etc). To access it, follow these steps: Go into Settings > WiFi and turn WiFi Off. The purposes of these measurements include: The iPhone has a hidden built-in Field Test Mode app. For this measurement, CSI-RS transmitted on antenna port 3000 is used.ĬSI-RSRQ (CSI reference signal received quality): CSI-RSRQ is defined as, N * CSI _ RSRP CSI _ RSSI. CSI-RSSI includes the power from sources, such as co-channel serving and non-serving cells, adjacent channel interference, and thermal noise. This measurement is also performed across N number of resource blocks (measurement bandwidth). After going through source code of CellSignalStrengthLte class - I found an old deprecated private field for the signal strength and the method to convert this signal to approximate RSSI value. For this measurement, CSI-RS transmitted on antenna port(s) 3000 or 30 is used.ĬSI-RSSI (CSI received signal strength indicator): CSI-RSSI is defined as the linear average of the total received power observed only in the OFDM symbols, in which CSI-RS is present. In the end I wasnt able to convert RSRP to RSSI, but I have managed to get approximate RSSI value. This measurement is performed across N number of resource blocks (measurement bandwidth). CSI-RSRP (CSI reference signal received power): CSI-RSRP is defined as the linear average over the power contributions of the resource elements of the antenna ports, which carry CSI-RS configured for RSRP measurements.
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