Have arequirement to measure river flow from a lamp post at an approximate vertical height of approximately 20m from the river top surface. The river water level and velocity has to be measured. The lamp post is on a bridge across the river and in the middle of the river. I have the iwr6843isk at an angle of 45 deg to the vertical making a slant range of approximately 20*sqrt(2). The actual velocity of water reported is going to be velocityRadar/sqrt(2).
I have the IWR6843ISK and I have conected it to my laptop via the usb cable. The usb cable is providing iiwr6843isk with the required power from the laptop. I am running the mmwave demo visualizer with sdk 3.5 and have flashed the appropriate binary on the iwr6843isk provided in sdk 3.5 demo folder. From the demo visualizer, I have set the required fields with appropriate values with a configuration of 1 tx 1 rx. On the plots tab, I have experimented with cfar threshold for range and doppler.
I am not getting any reliable confident results. Cfar too low and I get many objects. Too high and nothing. Same with velocity. Started experimenting in a large room. There I get range and velocity results from walls and doppler from moving around etc.
Where am I going wrong with the river scenario? Is sufficient power is being delievered from laptop? Do I need to supply extra 5V from pins? In a room, I experimented with a different config of beamforming with all tx set to ON i.e. chirpcfg last field set to 7 as opposed to 1. Interested in boresight so phase set to zero in profilecfg i.e. no beam steering. I did not get any change is SNR in rangle plot on demo visualizer when compared to 1 tx 1 rx config. Maybe all tx ON not working. How shall I resolve the situation? Any chance of getting river range and surface velocity?
