Part Number: IWR6843
Tool/software: Code Composer Studio
hello；
we have made a antenna board with 6843 chip，with 3 transmit antennas and 4 receive antennas，3 transmitters form a uniform linear array，and 4 receivers form a uniform linear array，so 3 transmitters and 4 receivers form a uniform linear array with 12 virtual channels，how to extend unambiguous maximum velocity ？
For FMCW fast chirping signal, the maximum unambiguous velocity is Vmax = wavelength/4Tc, with Tc is the chirp duration. To get high unambiguous velocity, chirp duration becomes too small to be practical in real system. for our system ，the maximum velocity is Vmax = wavelength/(4*Tc* 3 (transmitters)),
In the document，
mmwave_sdk_02_00_00_04/packages/ti/demo/xwr16xx/mmw/docs/doxygen/html/index.html#Figure_calibration
the document have given a algorithm to resolve ambiguous velocity for the case 2 transmitters and 4 receivers form a uniform linear array with 8 virtual channels，how to extend this algorithm to the case 3 transmitters and 4 receivers form a uniform linear array with 12 virtual channels ？
the question ：
IWR1443: How to extend unambiguous maximum velocity of mmWave sensor
site：
have give two possible solutions to extend maximum unambiguous velocity：
1.Velocity disambiguation by varying inter-chirp time
2.Velocity disambiguation based on observation of successive range estimates
Compare to the 2nd method，the 1st method ，It's difficult to realize in the case 3 transmitters and 4 receivers.
we didn't undestand the 2nd algorithm，is it same as the method in the upper document ？ how to apply the sdk document‘s velocity disambiguation algorithm to the case 3 transmitters and 4 receivers form a uniform linear array with 12 virtual channels ？？？
please give us help
many thanks
