Secret Communication TRIZ Cases
- Variable Cyclic Extension DMT Symbols for ISDN Noise
A discrete multitone system adjusts cyclic extension length based on subchannel spacing to increase symbol count during low noise intervals.
- User Defined Security Parameters for Fraud Detection
A fraud-prevention system uses user-defined security parameters to screen transactions and block unauthorized access attempts.
- Independent Rise and Fall Waveform Shaping Equalization
Independent rise and fall waveform shaping equalization compensates for asymmetric channel distortions in high-speed optical communications.
- Channel Estimation via Segmented IFFT for CMMB
Segmenting 4096-point responses into 512-point blocks lowers operation complexity and power consumption while maintaining accuracy.
- Time Dilation Waveform Dithering for LPI Signal Suppression
Applying pseudo-random time dilation to waveform samples suppresses cyclostationary detection without increasing hardware complexity.
- Signal Generation Device Phase Rotation Orthogonality
A signal generation device rotates phase of duplicated data segments to induce second-order cyclostationarity characteristics.
- Keyboard Crossbar Scrambling to Thwart Keylogging
A crossbar scrambles key signals to thwart keylogging attacks.
- SP-OFDM Jamming Resistance via AES Phase Shifts
Secure pre-coded OFDM breaks signal symmetry with AES phase shifts, maintaining channel capacity under disguised jamming.
- Multi-Channel RF Signal Filtering for Interference Reduction
Digital filtering reduces power levels in unused radio frequency channels to enable simultaneous multi-channel transmission.
- Polarization Decomposition Device for Quantum Communication
A polarization beam splitter and interference beam splitter split optical signals into orthogonal directions using phase delay and rotation.
- Backfire Distributed Antenna System Cell Isolation
A backfire distributed antenna system simulcasts delayed signals from remote units to maintain consistent coverage.
- Serial Data Transmission Without Start-End Flags
Cyclic shift decoding restores original data from continuous binary streams, eliminating flag overhead to boost serial transmission efficiency.
- Air Interface Key Management in HSPA+ Networks
SGSN generates intermediate keys for RNC distribution to fix Node B security gaps.
- OFDM Tone Reservation for PAPR Reduction
Dynamic tone selection based on channel state information minimizes signal distortion from RF amplifier non-linearity.
- Wireless Signal Scrambling Using Encrypted Time Tokens
Dynamic encrypted time tokens authenticate remote controls to prevent universal device bypass and protect built-in television interfaces.
- Unified Transcoding System Resource Pool Optimization
A unified transcoding system pools shared resources to jointly minimize overall processing and storage expenses.
- Heterogeneous Pilots for LTE Resource Penalty
Heterogeneous pilots use spread-spectrum signals to transmit reference data without occupying resource elements.
- OFDM Channel Flatness Compensation via Frequency Domain Lookup
A frequency domain compensation table determines target vectors for OFDM sub-carriers to enable precise flatness correction.
- MMSE Channel Estimation for OFDM Synchronization Errors
A channel estimation system corrects linear phase rotation from synchronization errors to restore correlation.