SYSTEMS AND METHODS FOR DELAY MANAGEMENT IN DISTRIBUTED ANTENNA SYSTEM WITH DIRECT DIGITAL INTERFACE TO BASE STATION

摘要

A waveform generator comprising circuitry configured to generate a digital representation of a waveform and apply the digital representation of the waveform to a digital interface of a radio system configured to propagate the waveform and convert the digital representation of the waveform to a radio frequency signal transmitted at the antenna; and mark the digital representation of the waveform with respect to a frame of digital data with a marker. Measurement of when the waveform occurs in the radio frequency signal based on the marker occurs by a spectrum analyzer. Determination occurs of a downlink propagation delay for the radio system between application of the digital representation of the waveform at the digital interface and transmission of the radio frequency signal at the antenna. The shape of the waveform allows for accurate delay measurement.