THz Communication
THz Channel Characteristics
What: Frequencies of 100 GHz – 10 THz (wavelengths: 3 mm – 30 µm)
Why: Significant advances in device technology: THz provides ample bandwidth resources for future communications systems
Application: Mainly short-range transmission
Challenges: Strong molecular absorption effects due to water vapor and oxygen molecules & substantial frequency-dependent spreading loss
Codebook-based Beam Alignment
Challenge: Range limitation
Approach: Multi-antenna TX with fast codebook-based beam alignment
Coarse Beam Alignment
Idea: CPFSK (partially replace beamforming by repetition coding)
Benefit: Simple hardware (only VCOs)