Radio-Over-Fibre TRIZ Cases
- CATV Receiver Distortion Cancellation Circuit
A CATV receiver circuit dynamically cancels optical filter and fiber distortions using a microprocessor-controlled anti-chirp signal.
- Optical Transmitter SBS Suppression via Laser Dithering
External laser dithering spreads optical power spectrally to suppress stimulated Brillouin scattering and increase fiber launch power.
- Optical Link Linearization via Feedforward Distortion Cancellation
A feedforward optical link subtracts spurious components from a main transmission path to linearize radio frequency signals.
- Optical Transmitter Amplitude Control for RIN Suppression
An optical transmitter uses amplitude control to generate constant electric signals for direct modulation.
- RF Driver and Optical Device Dithering Control
Electronic controller dithers RF drive signal amplitude to adjust optical device operation settings, maintaining stability under time-varying conditions.
- Digital-Analog Interface Modules for Flexible DAS Signal Distribution
Digital-analog interface modules enable flexible distribution of digital and analog communications signals over digital mediums, reducing upgrade costs.
- Distributed CATV Out-of-Band Signal Transport via Packet Conversion
A distributed CATV system converts RF signals into digital packets for efficient transport over coaxial cables.
- Wireless RF Conversion System for 5G Path Loss Mitigation
Optical-electrical conversion in distributed remote antenna units overcomes millimeter wave path transmission loss and wall attenuation.
- Light Transmission Device Dynamic Processing Sequence Switching
A light transmission device selects processing sequences based on optical module identification information.
- Optical Transmitter Signal Detection for Interference Reduction
Adaptive threshold detection controls transmitter activation timing, reducing optical beat interference in shared links.
- Optical Interconnect Architecture for High-Performance Computing
High-performance interconnect architecture merges signal processing functions into a single optical device.
- Unified Optical Fiber DAS for Multi-Provider Small Cell Routing
A unified optical fiber distributed antenna system routes small cell communications from multiple service providers over dedicated fibers.
- Radio-over-Fiber Transmission Using Digital Baseband Modulation
Digital baseband modulation over optical fibers enables reliable radio signal transmission using mature analogue power amplifiers.
- Optical Switch Enables Remote Base Station Signal Monitoring
An optical switch device routes base station signals to measuring instruments, eliminating manual on-site visits required for traditional monitoring setups.
- Optical Signal Generating Apparatus for Cost Reduction
An optical signal generating apparatus uses intensity modulators and amplifiers to produce multi-level signals.
- Optical Receiver Reference Phase Estimation for OFDM Noise Resilience
Decision-directed averaging compensates for amplification noise and phase drift, improving bit error rates without pilot tone overhead.
- Frequency Shifted Feedback Path for Radio over Fiber Links
A frequency shifter in the optical feedback path converts signals to reduce RoF link distortions.
- Analog RAU Digital Adaptor for DAS Compatibility
An analog RAU digital adaptor converts signals between digital DAS infrastructure and analog remote antenna units.
- SDN Controller for Unified WDS and LAN Management
An SDN controller manages wireless distribution systems and local area networks through unified software-defined architecture.
- Optical Transmitter LC Parallel Circuit CNR Stabilization
An LC parallel circuit stabilizes the carrier-to-noise ratio of an optical transmitter, compensating for manufacturing variability in the TOSA.
- Antenna Status Monitoring Over Fiber Optic Links
Special signaling over fiber optic links distinguishes antenna faults from link failures without interrupting normal RF signal transmission.
- Fibre-Radio Network 60GHz Wireless Access Node Design
A fibre-radio communication network uses 60GHz wireless access nodes connected via fibre optic cables to support client terminals.