Methods for calibrating receive signal strength data in wireless electronic devices

摘要

A wireless electronic device may include wireless communications circuitry and processing circuitry. The wireless communications circuitry may receive radio-frequency signals from external communications circuitry in a number of frequency channels of a communications band. The processing circuitry may gather received signal quality data such as receive signal strength indicator (RSSI) values from the radio-frequency signals received in each of the frequency channels. The processing circuitry may accumulate respective probability distributions of gathered RSSI values for each frequency channel and may compare each of the probability distributions to generate RSSI offset values for each frequency channel. The processing circuitry may gather additional RSSI values in one or more frequency channels and may adjust the additional RSSI values based on the associated RSSI offset values. The processing circuitry may use the adjusted RSSI values to determine an accurate location of the wireless electronic device.

主权项

1. A method for operating a wireless electronic device having wireless communications circuitry and processing circuitry, the method comprising:
with the wireless communications circuitry, receiving radio-frequency signals in first and second radio-frequency channels; with the processing circuitry, gathering receive signal quality data for the received radio-frequency signals in the first and second radio-frequency channels; and with the processing circuitry, comparing the receive signal quality data gathered from the radio-frequency signals in the first radio-frequency channel to the receive signal quality data gathered from the radio-frequency signals in the second radio-frequency channel, wherein comparing the receive signal quality data comprises obtaining a receive signal quality offset value for the received radio-frequency signals in the first radio-frequency channel; and with the processing circuitry, compensating for channel-to-channel gain bias associated with the wireless communications circuitry by modifying the receive signal quality data for the received radio-frequency signals in the first radio-frequency channel using the receive signal quality offset value.