Multi-Frequency Code Systems TRIZ Cases
- Filter Bank Segmentation for Multicarrier Processing Efficiency
Segmenting the filter bank into modular units reduces computational complexity while improving spectral efficiency in multicarrier systems.
- Packet Format Detection via Repeated Legacy Signal Field
Repeated legacy signal field differentiates packet formats to resolve AGC resetting timing conflicts during multi-standard coexistence.
- OFDM Receiver Signalling Detection Using Moving Averaging Filters
A receiver correlates pre-amble and post-amble guard intervals using moving averaging filters to form output correlation samples.
- OTFS Modulation for Doppler and Multi-Path Resistance
Orthonormal time-frequency shifting spreads data symbols across a two-dimensional grid to enable high-data-rate transmission.
- STBC Symbol Mapping in FBMC Systems
Filter index directs STBC symbol placement to reduce inter-carrier interference and improve SNR.
- Multi-mode OFDM Receiver with Reduced-Complexity ML Decoding
A multi-mode orthogonal frequency division multiplexing receiver uses reduced-state sequence estimation to process data-carrying subcarriers.
- VHT-SIG-B Field in Null Data Packets for Interference Management
Retaining VHT-SIG-B fields in null data packets extends beamforming feedback processing time while maintaining unified preamble structure.
- Chirp Spread Spectrum Data Alignment Using Single Opposite Chirp
A receiver aligns data acquisition using a single opposite chirp after symbol synchronization.
- Constellation Extension Projection for OFDM PAPR Reduction
A constellation extension projection mechanism modifies symbol positions in an outward angular region to lower the peak-to-average power ratio of transmitted signals.
- Quantized Resource Allocation for Guard Interval Waveforms
Quantizing resource allocation parameters reduces signaling overhead while maintaining communication performance for guard interval waveforms.
- Modified Fourier Transform for PAPR Reduction in 5G Wireless
Applying a phase offset via modified Fourier transform reduces peak-to-average power ratio, improving cell edge coverage and battery life.
- Adaptive Cyclic Prefix Design for Millimeter Wave Symbol Alignment
A signaling structure adjusts cyclic prefix lengths based on subcarrier spacing to maintain symbol alignment in wireless networks.
- DVB-T2 Receiving Apparatus Early PLP Decoding via Offset Feedback
A DVB-T2 receiving apparatus detects fine and coarse carrier frequency offsets to enable early PLP decoding.
- Multi-standard Peak Canceling Circuitry with Pulse Allocator
A multi-standard peak canceling circuit uses a pulse allocator to adjust cancellation weights for individual carrier waveforms.
- OFDM Signal PAPR Reduction via Modified Pilot Tones
Modified pilot tones cancel OFDM symbol peaks, reducing peak-to-average power ratio while preserving bandwidth efficiency and signal quality.
- RF Transceiver Digital Pre-Distortion Feedback Switch
A switch routes receive samples to a DPD unit for power amplifier compensation.
- Peak-to-Average Ratio Reduction via Cancellation Pulse Generation
Time-reversed pulse segmentation reduces peak processing time, improving power amplifier efficiency.
- OFDM Reference Signal Staggering Offset for Ambiguity Resolution
A staggering offset format modifies OFDM reference signal comb structures to extend unambiguous ranges in delay and Doppler domains.
- Resource Block Index Modulation for IoT Spectral Efficiency
Resource block-level index modulation conveys data via selected resource block indices, addressing spectral inefficiency in dense IoT networks.
- Sounding Reference Signal Transmission in LTE TDD Special Subframes
Network devices instruct terminals to transmit sounding reference signals on specific symbols within uplink pilot time slots of special subframes.
- DM-RS Scheduling for Uplink Spectrum Efficiency
Dynamic DM-RS scheduling reduces reference signal overhead, enhancing spectrum efficiency and system throughput in small cell deployments.
- Multi-frequency Receiver Signal Division for Baseband Processing
A multi-frequency receiver divides RF signals into distinct bands to route data via digital baseband interfaces.
- FBMC Pre-Equalization for Tail Effect Mitigation
Pre-equalization coefficients counteract long waveform tails to maintain spectrum efficiency without signal distortion.
- Single FFT Signal Chain for Orthogonal NB-IoT Cells
Aligning subcarriers across NB-IoT cells enables a single FFT chain, eliminating digital filters and reducing RAN complexity.
- UW DFT-s-OFDM Guard Interval Adaptation
Unique word discrete Fourier transform spread orthogonal frequency division multiplexing replaces fixed cyclic prefixes with adaptive guard intervals.
- UW-OFDM Waveform Chirp Prefix for Radar Sensing
A UW-OFDM waveform integrates deterministic chirp sequences as unique words to enhance power amplifier efficiency.