Multiple antenna multi-frequency measurement system

A measurement system for tracking, the measurement system comprising:

• a plurality of antennas operable to receive RF signals, the RF signals comprising first and second frequency signals;
• a plurality of first frequency RF sections operable to obtain the first frequency signals from the RF signals, each of the plurality of first frequency RF sections connected with a respective one of the plurality of antennas;
• and
• a second RF section operable to obtain the second frequency signals from the RF signals from at least two of the antennas.

A method for processing RF signals, the RF signals being received by a plurality of antennas, the RF signals comprising a primary frequency RF signal and at least one secondary frequency RF signal, the RF signals being split into a first output signal and a second output signal, the method comprising the steps of:

• (a) processing the first output signal to obtain a sampled primary signal;
• (b) multiplexing the second output signals to output at least one multiplexed signal;
• (c) processing the multiplexed signal to obtain a sampled secondary signal;
• (d) correlating the sampled primary signals to obtain code phase and carrier phase for the primary frequency RF signals;
• (e) correlating the sampled secondary signals to obtain initial carrier phase for the secondary frequency RF signals;
• and
• (f) reconstructing carrier phase of the secondary frequency RF signal using the initial carrier phase of the secondary frequency RF signal and the carrier phase of the primary frequency RF signal.

A measurement system for determining a position, the measurement system comprising:

• a plurality of antennas;
• a plurality of first filters, one filter for each antenna of the plurality of antennas, each filter operable to obtain information from a respective one of the plurality of antennas at a primary frequency;
• a second filter operable to connect with at least one of the plurality of antennas;
• and
• a processor operable to calibrate biases for the information at the primary frequency with a RF path bias calibration algorithm as a function of an output of the second filter.