ada503803(the mobile internet——the next big thing2007)(6)

移动互联网及应用

Ultimate Military Comms SolutionDriven by Capacity, Availability& SecuritySpectrally efficient adaptive multi-level frequency hopping coherent waveforms Multi-level complex waveforms for high-capacity (short-up emitter) Waveform agility for SNR utilization Multi-dimensional diversity for link availability, LPI/LPD, anti-jam& security (e.g. frequency, polarization, spatial,…) Coherent detection brings sensitivity and enables DSP channel compensation Link CapacityApproaching Shannon Capacity Limit

Waveform/Symbol Rate AgilityModulation AgilityUse modulation that is best suited for the target environment and link Enables variable bit rates and ultra -high capacity per wavelengthI

BPSK 1 bit/symbol

Q

QPSK 2 bits/symbol

Software Defined Agile Modems

16-QAM 4 bits/symbol

Unified JTRS-Like RF to Optical Transmission Architecture2 Polarization I,Q Synthesizer(Vector Modulator)

Coherent Band Translation

“RF”DC to Daylight

Coherent Band Translation

2 Polarization I,Q Analyzer(Coherent Receiver)

Baseband I& Q Data

Aperture& Transmission Channel

Baseband I& Q Data

“IF”DC to Daylight

(Air/Space/Water)

“IF”DC to Daylight

Overlaying Free-Space Optical Communications Brings Added Capacity& Security

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