Importance

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Abstract

Disclosed are a device (1) for graphical analysis of an impairment of a demodulated signal, and a corresponding process (2). The device comprises a communication interface (11) and a digital processing logic (12). The communication interface (11) is configured for receiving the demodulated signal including in-phase and quadrature, I/Q, symbols (13). The digital processing logic (12) is configured for populating a histogram (14) with a subset of the received I/Q symbols (13) relating to a nominal I/Q symbol (13N) of a graphical pixel-based I/Q symbol constellation (16) of the demodulated signal. The histogram (14) reflects a spread (15) of the subset of the I/Q symbols (13) in the I/Q symbol constellation (16). The spread (15) depends in direction on a type of the impairment and in magnitude on a strength of the impairment. The digital processing logic (12) is further configured for verifying a compliance of a statistical feature (18) of the histogram (14) with a threshold (19). This achieves a higher degree of automation, a higher probability of observing significant transmission errors, and more reliability and higher throughput of measurement.

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First Claim