Handling of radio frequency front-end group delays for round trip time estimation
摘要
說明書
The discrepancy between the measured and actual times is explained as follows. In wireless communications, a source device (or simply “source”) transmits radio frequency (RF) signals to a destination device (or simply “destination”). In order to transmit a digital signal, the source performs a process to convert the digital signal onto radio frequency (RF) signals. For example, the source typically includes a digital-to-analog converter (DAC) to convert the digital signal into a baseband analog signal. The baseband signal is then upconverted in frequency into the RF signal, which is then transmitted by the antenna(s) of the source. The destination performs a reverse process to retrieve the original digital signal. For example, the RF signal arrives at the antenna(s) of the destination. The received RF signal is filtered (e.g., low pass, high pass, band pass). The filtered RF signal is amplified and downconverted into the baseband signal. The digital signal is recovered, e.g., by an analog-to-digital converter (ADC) at the destination device.
