The human is definitely a weak point in the system. Its input is wide spectrum, but its comprehension is poor. It receives audio, visual, olfactory, and tactile inputs and its main output system is voice or signal substitutes for voice such as hand gestures and finger gestures. To work best with a human, you must keep things SIMPLE! BUT, only the input and output are important. The system can be as complex as necessary, as long as the Human/Machine interface is apparently simple to the human.
ULTIMATE PRINCIPLE OF WEAPONS DESIGN. RELIABILITY IS THE PRIMARY CONSIDERATION. A weapons system must work EVERY TIME you pull the trigger. This principle has kept the M1911 Colt .45 Pistol in the US Army for 80 years.
The system helmet surrounds the main input system, eyes and ears. Controls must be simple AND SILENT voice may work OK in an armor vehicle of a fighter plane, but the grunt on the ground wants NO NOISE emitted unless absolutely VITAL to the mission or keeping him alive, because sound kills.
Choices: There are two main locations for sensor systems, one, the helmet, two the weapon. Or a combination of both.
The current combination favored by Army R&D is a weapon-mounted sight, fiber optically tied to the helmet display. I think that they were overly influenced by the pictures from the Tet Offensive in SVN, where a soldier raised his M-16 over his head and sprayed full auto over a wall. The advantages are: Simplicity, ease of operation, and flexibility of weapon positioning. The drawbacks are: limited stability on point targets at ranges beyond 100 meters, that is, the system discourages good solid weapon firing positioning and encourages short range point and squirt.
First, determine what you want the soldier to do, then give him the necessities to accomplish the mission.
Second, it must be RELIABLE!
Third, follow Heinlein's dictum, "A suit you just wear."
Fourth, keep it simple to the operator.
Levels of performance/access to data.
Every soldier does not need the same equipment or information. There is a difference in
need between the rifleman in a rifle squad, his squad leader, his platoon leader, and a
Ranger or SEAL on a penetration mission.
Basic System
Eye protection.
This can be provided by either inner glasses or a face shield. Or both.
Day/night vision.
Current speculation leans toward thermal imaging technology, as this allows you to see
through incidental smoke. Battlefield smoke generators now counter IR emissions.
Communications.
This must be a flexible system. Capable of sending/receiving audio and visual. Capable
of being linked by fiber optics as well as radio. Optionally direct line laser links. There
should be a squad BS link for morale purposes included (fiber link only) to assist status
monitoring while in fixed positions, this is also a sneaky trick to get tired troops to
rig their links. The APC (Armored Personnel Carrier) could provide a central switching
point while in position, but given the current and rising level of smart weapons, and APC
could be a battlefield dinosaur, soon to be replaced with smaller wheeled APC's depending
on speed and small size and signature to be less vulnerable.
Informal Displays/compass/maps.
This must be another flexible system. First it must be secure. The Global Positioning
System is soon to be accurate to 5 meters, vertical and horizontal. This allows an exact
location of all friendly forces. In the wrong hands this could be fatal! The individual
rifleman needs, most of the time, only a local knowledge, emergency rally point, safe zone
(a questionable idea at best), and especially the area immediately to his front and his
zone of responsibility, depending on his weapon/mission. This information should be
displayed in his vision ONLY as needed. (KISS!) In briefings he should get a larger
picture, but this should not be stored by his computer for field security reasons.
Depending on mission and level of command more information should be dispensed as
necessary, need to know basis only! The highest level of enhancement will probably be for
Forward Support Controllers, whose displays will include a grid overlay, preplanned target
zones, and ESPECIALLY locations of friendly forces. There are a lot of mourning British
Families who wish this technology had been available in the Gulf War. The British army
took more casualties from friendly fire than enemy fire!
Hearing protection/enhancement.
This is a tricky area for priorities. Which is more important, local sound enhancement
or the command link? The sound enhancement will have to be user controlled, with overrides
for those times when the enemy clobbers the radio link with noise generation or weapons
fire next to the soldier. The advantages of a binaural system, with hearing protection
outweigh the disadvantages. Currently, police SWAT "Special Weapons and Tactics" use
amplified headsets on raids, some experimental models also have radio linkage. One of the
best is called "Wolf Ears" and makes a human the equal of a wild animal in sonic sensor
capability.
Defense Sensor.
This is a combination CBR sensor, capable of detecting and analyzing chemical agent
attacks and the presence of radiation. This should include radar and laser painting of the
soldier�s position. It should also send the alarm over the comm. net, just in case the
individual wearing it was a little slow.