IQ Freq Meas (NB-IoT)

IQ Freq Meas shows the IQ data taken after the OFDM symbol FFT has been performed on the measured data. This trace is available only for uplink signals.

When there are multiple tones, NPUSCH IQ values shown on the IQ Freq Meas trace resemble a collection of random points concentrated around the origin as a result of the SC-FDMA modulation.

To view SC-FDMA (uplink NPUSCH) signals in the time domain, use IQ Meas.

Only the points of channels/signals selected in Composite Include are shown on this trace. The color of a point indicates which channel/signal the point belongs to. The colors of the channel/signals are shown in the Frame Summary trace.

The information on this trace comes from the data in the Measurement Interval.

The data in IQ Freq Meas, which comes from the Time trace data after being processed by the demodulator, is a 2x2 matrix with frequency along one dimension and time along the other. In addition, each one of the points in the matrix is a complex value; therefore, there are 4 total dimensions. The choice of trace format determines which two dimensions will be on the x-y plane, and which dimensions will be overlapped, averaged, or ignored. The relevant trace formats and their corresponding view of the data are described below.

See Also

IQ Meas

IQ Ref

IQ Freq Ref

Available Trace Data