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RFbeam Microwave GmbH | Schuppisstrasse 7 | CH-9016 St. Gallen | www.rfbeam.ch | K-MD2 Engineering Sample | data sheet

07/2018 – Revision A | Page 15/23

The following table describes the processing parameter which can be changed by the user in the

/mnt/sensor_server.conf.

Processing parameter which aren’t described in this table are system dependent and must not be

changed. Changing these parameters can result in an irreparable state where the radar has to be repro-

grammed by RFbeam Microwave GmbH.

Key

Description

mean_channels

The number of receiver channels to average for the mean range-doppler map.

peak_threshold

The signal threshold for peak detection.

max_num_peaks

The maximum number of peaks to find.

background_update

The number of frames to average for the background range-doppler map.

range_compensation

The rate at which the peak threshold is adjusted with range, relative to mid-range.

min_range

The minimum range cell for finding peaks.

max_range

The maximum range cell for finding peaks.

min_speed

The minimum doppler bin for finding peaks.

max_speed

The maximum doppler bin for finding peaks.

smoothing

Smooth the mean range-doppler map with a 3x3 Gaussian window.

azimuth_ref_channel

The reference receiver channel for Azimuth direction calculation.

azimuth_alt_channel

The alternate receiver channel for Azimuth direction calculation.

azimuth_offset

The phase offset for the azimuth channel.

azimuth_ratio

The ratio between azimuth phase and reported direction.

elevation_ref_channel

The reference receiver channel for Elevation direction calculation.

elevation_alt_channel

The alternate receiver channel for Azimuth direction calculation.

elevation_offset

The phase offset for the elevation channel.

elevation_ratio

The ratio between elevation phase and reported direction.

max_num_tracks

The maximum number of tracks to report. The internal list length is the same as the maximum number of peaks to find.

max_range_jitter

Maximum difference in range bins between predicted range and range of peak.

max_speed_jitter

Maximum difference in doppler bins between predicted speed and speed of peak.

direction_error_threshold

Maximum difference in degrees between predicted direction and direction of peak.

min_track_life

Minimum number of frames with tracked detection before track is reported.

max_track_life

Maximum number of frames without tracked detection before track is lost.

track_history

Number of previous frames to use in tracking.

stationary_objects

Report tracks that have never moved.

constant_speed

Assume constant speed in tracking algorithm.

Table 7: Processing parameter

Firmware Update

The processor can boot from an image stored

in SPI flash. The firmware is loaded from the boot

image and then a file system is unpacked containing

the software. The current version of the firmware

and software is shown in the

/opt/versions file.

The flash is split into two sections, with the boot

image stored in the first section. The second section

is formatted with a JFFS2 file system and mounted

to 

/mnt.

The boot image can be updated by transferring

the new boot image to

/tmp and writing the image

to the first section of the flash with

flashcp:

flashcp –v /tmp/BOOT.bin /dev/mtd0

After the device has been powered off and on,

the new firmware is loaded.