User Guide

Fig. 4: Residual crosstalk effects around a strong reflector

False positives identified as related to crosstalk are removed in zone B to D. At a greater distance, the

detection range is partially reduced in zone E. In zone B to D, false negatives are expected, and their

numbers will vary depending on the strength of the main reflector. In general, detection will improve away

from strong reflector both laterally and vertically some segments away and in the distance. LeddarTech

recommends implementing a lower responsiveness zone D (Fig. 4 above) from the distance of a flagged

aggressor (Flags Sat = 3 and Xtalk = 6) extending up to a maximum of 3.5 meters ahead and 7 meters

behind reflector in distance. This zone externs laterally for all segments within one of the sub-fields of view

(Fig. 9), where the strong reflector is present. Inside this lower responsiveness zone, low-reflectivity targets

may not always be detected while the saturation condition is present. This evaluation must be done

separately for each of the eight lines.

Table 4: Distance around strong reflectors to consider for the zone

Amplitude Zone

Affected Area D (Fig. 4)

Zones I and II

≈ 1.5 m around aggressor

Zone III

≈ 3.5 m

Zones IV and V

+7 m / -3.5 m

• A: Worst crosstalk effects for extremely high reflector: False positives +/- 1 segment H+V

• B: Removal of false positives generated by crosstalk, very limited detection capability,

possible false negatives with improvement away from affected segment both in distance,

vertically and laterally

• C: Removal of false positives up to end detectors for the head seeing the reflector, limited

detection capability, possible false negatives

• D: Limited detection capability of low reflectivity target, False negatives possible from

distance of reflector 7m behind To 3.5m before with improvement away from affected

segment both in distance and laterally.

• E: Higher detection threshold zone with reduced range

A B B B BBBBBC

High

reflector

One vertical segment

One horizontal

segment

B B CA