Meeting the Energy Needs of Future Warriors (2004) / Chapter Skim
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5 Progress
5 Progress
Pages 46-55
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From page 46... ...
As shown in Table 5-2, the Objective Force Warrior-Advanced Technology Demonstra- peak power, average power, and average/peak ratios (withtion (OFW-ATD) Program.
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From page 47... ...
. NOTE: DRAM, dynamic random access memory; GPS, global positioning system; HIA, high integration actuator; JTRS, Joint Tactical Radio System; KB, kilobyte; MBITR, multiband intra/inter team radio; OFW, Objective Force Warrior; PAN, primary area network; UAW, universal access workstation; WLAN, wireless local area network; USB, universal serial bus; VoIP, Voice over Internet Protocol.
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From page 48... ...
action type per bus. The result has been that computer power To synchronize doctrine with technology and minimize demands of the three generations of LW are about constant soldier communications transmissions, the OFW-ATD softin spite of the significant improvement in energy efficiency ware team is working closely with the operational effectiveof the underlying computer system technologies.
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From page 49... ...
For example, a fundamen- was available about the progress of JTRS design, but comtally different approach would use a high-speed, short-range, mittee members familiar with software radio research sugwireless body LAN that has an undetectable emission signa- gested several areas for the Army to investigate for possible ture. One approach to this goal would use ultrawideband improvements in energy efficiency.
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From page 50... ...
Since 1997, the been developed that accurately model radio power demand energy efficiency of circuits has improved by a factor of at and these could be used to evaluate the energy efficiency of least 5. By one measure, the reduction in demand is greater various protocols.
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From page 51... ...
The most important new trend is toward changes in technology and design to deal with the growth in static Changes in Commercial Development Trends power relative to active switching power. This increased static power is from the increased transistor "off" current as There is beginning to be a divergence between lowthe threshold voltage has been reduced, along with the power personal computers and handheld devices (cell operating power-supply voltage, to maintain performance phones, PDAs, and the like)
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From page 52... ...
Experience tells us that the Army will To see the relationship between this energy efficiency continue to use commercial developments more as a menu metric and the various levels of flexibility, a variety of of prospective applications and functions, then engage a designs will be compared that range from completely contractor to independently develop or integrate the most flexible, software-based processors (including both generalrelevant functions. purpose processors and those optimized for digital signal processing)
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From page 53... ...
3 1999 5.2 µP -- G5 4 2000 5.6 µP -- G6 5 2000 5.1 µP -- Alpha 6 1998 15.4 µP -- P6 7 1998 18.4 µP -- Alpha 8 1999 5.6 µP -- PPC 9 1998 18.6 µP -- StrongARM Software-programmable digital signal processors 10 2000 4.2 DSP -- communications 11 1998 18.1 DSP -- graphics 12 1998 18.2 DSP -- multimedia 13 2000 14.6 DSP -- multimedia 14 1998 18.3 DSP -- multimedia 15 2002 22.1 DSP -- MPEG decoder Dedicated designs 16 2001 21.2 SoC -- encryption processor 17 2000 14.5 SoC -- hearing aid processor 18 2000 4.7 SoC -- FIR for disk read head 19 1998 2.1 SoC -- MPEG encoder 20 2002 7.2 SoC -- 802.11a baseband NOTE: µP, microprocessor; PPC, power personal computer; SOI, signal operating instructions; DSP, digital signal processing; MPEG, moving pictures expert group; SoC, system-on-a-chip; FIR, first-impressions report.
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From page 54... ...
Increasing the development time horizon would alenergy efficiency, commercial FPGAs are still more effi- low the program to build on prior programs by evolving the cient than software processors. The OFW soldier radio, for SoC to meet new needs and requirements, similar to the sucexample, is being prototyped using FPGAs.
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From page 55... ...
However, on the demand side, the communications an analysis would easily justify paying contractor incentives electronics (circuits and systems) community continues to and increasing development activity on energy-efficient use traditional military approaches to circuit and systems design approaches to future Land Warrior systems.
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