Carrier Regulation TRIZ Cases
- Doppler Predictor for Locomotive Frequency Offset Compensation
A Doppler predictor estimates frequency offsets using weighted coarse and fine measurements to track rapid signal variations.
- PMF-Based Frequency Offset Estimation in Coherent Receivers
A coherent receiver estimates local oscillator frequency offset by maximizing the summation of squared probability mass function values derived from equalized symbols.
- Phase Noise Reduction in Communication Systems
The method extracts essential corner samples from the complete symbol constellation for phase rotation estimation, reducing computational complexity while maintaining accuracy even at low signal-to-noise ratios.
- Coherent Optical Receiver Adaptive Equalizer Initialization
An initialization system uses a known data sequence to rapidly converge adaptive equalizers in coherent optical receivers.
- Narrowband Receiver Frequency Offset Correction
A narrowband receiver identifies frequency offsets by subtracting signal magnitudes across divided bands to demodulate preambles.
- Master-Slave Carrier Frequency Error Correction
Segmenting component carriers into measurement and non-measurement groups reduces power consumption while maintaining tracking accuracy.
- Dual Layer Frequency Offset Acquisition for Wireless Signals
A dual layer frequency offset acquisition technique processes received preambles using coarse and fine estimation methods to determine signal parameters.
- M-QAM Carrier Phase and Frequency Offset Tracking
A grid search selects initial phase offsets for M-QAM symbols using hard decisions to establish a reliable starting point for signal processing.
- Synchronization Apparatus Reducing Processing Volume via Pattern Segmentation
A synchronization apparatus segments signals into multiple patterns to reduce processing volume while maintaining detection precision.
- Super Regenerative Receiver Synchronization via Quench Rate Adjustment
A super regenerative receiver sets a quench rate to 1.5 times the chip rate for pulse synchronization.
- TD-SCDMA Frequency Offset Fine Estimation Using Phase Drift
A method calculates frequency offset by comparing QPSK modulation phase with received phase to derive phase drift.
- OFDM RF Distortion Compensation via Frequency Domain Inverse Sync
A radio frequency distortion compensator applies inverse sync function coefficients in the frequency domain to correct digital/analog converter artifacts.
- Non-data-aided Sampling Frequency Offset Estimation
A non-data-aided method estimates sampling frequency offset by correlating variable sample groups within received signals.
- Phased Array Carrier Frequency Offset Compensation
Analog phase rotation compensates for carrier frequency offset between local oscillators, avoiding impractical digital processing complexity.
- Chirp Receiver Synchronization via Circular Shift Phase Difference
A chirp receiver calculates frequency offset using phase differences between circular shifted signals.
- Doppler Estimation and Compensation for Wireless Links
A Doppler estimation system uses an accurate reference frequency to detect and offset signal shifts in wireless links.