Modulation With Suppressed Carrier TRIZ Cases

Positive and negative carrier half-cycles carry separate bits, boosting data rate while limiting harmonics and bandwidth demand.

Pre-distorted IQ modulation compensates amplifier nonlinearity, preserving control-signal shape and spectrum in acousto-optic elements.

A nonlinear RFID resonator auto-tunes to the reader frequency, preserving high-Q power transfer while maintaining fast communication.

By shifting interference from Gaussian to non-Gaussian, this modulation approach boosts channel capacity while lowering SC-FDMA PAPR and battery drain.

A self-tuning high-Q resonator powers the tag, then switches to a linear resonator to extend range while preserving communication bandwidth.

RF-modulated control signals carry network management settings between microwave devices, cutting manual setup time and labor.

Using a transformer winding as the oscillator inductor, this isolator cuts parts and power while speeding OOK carrier start-stop transitions.

Using a single-sideband mixer and cascaded divide-by-two stages, this case generates a pure internal calibration tone to correct low-IF image errors.

Phase and amplitude position modulation improve RFID signal reliability and data rate while staying within spectral mask limits.

Frequency-offset mixing reshapes a narrowband transmission signal to reduce spectral leakage and interference in adjacent bands.

A self-adaptive RFID resonator tracks reader frequency to keep high-Q power transfer while supporting fast communication and detuning tolerance.

Smart matching circuits translate off-state impedances to keep a 50-ohm antenna node and avoid switch loss in mmWave beamforming transceivers.

Polar conversion, digital envelope generation, and PLL phase modulation cut analog blocks, lowering transmitter power, cost, and mismatch sensitivity.

Directional couplers and phase shifters detect incident-reflected phase differences to compensate antenna mismatch and preserve PA linearity.

A filtered four-level FSK scheme tunes frequency shift to meet 6.25 kHz FCC masks without linear power amplifiers in LMR systems.

Directional couplers and phase shifters detect incident-reflected phase offset to compensate antenna mismatch without adding isolator weight or power loss.

An L-C-R output adjustment circuit keeps driver amplifier impedance stable across power gain changes and multiple RF bands while reducing die area.

Iterative complex-factor updates replace conversion-heavy complex division in power amplifier predistortion calibration, cutting resource use.

RF samples are averaged only when baseband amplitude stays within a threshold corridor, shortening antenna impedance measurement time.

Different cyclic delays on parallel symbol streams let MIMO links gain diversity and multiplexing together while avoiding channel singularity.

Low-frequency Delta-Sigma modulation plus binary up-sampling enables efficient RF transmission with better linearity and multi-standard reuse.

Switchable full- and partial-range amplitude paths achieve all phase states while reducing attenuator count and component cost.

By constraining phase and frequency deviation in the FM path, this transmitter reduces peak frequency, PLL complexity, and nonlinearity.

Truncated CAZAC sequence segments carry uplink control signals without reference demodulation, increasing user capacity with strong detection.

By measuring RF phase error with phase modulation disabled, this case speeds AM/PM calibration across bands while improving spectral purity.

Residual least-squares filtering cuts PAR in EDGE multicarrier signals while preserving EVM and frequency limits to improve amplifier efficiency.

Window-based amplitude shaping suppresses radar spurious components while concentrating energy at the center frequency to preserve SNR.

Integrated sign and slew-rate control lets a quadrature mixer handle ASK, FSK, and PSK at gigabit rates with lower spectral splatter.

PWM bias control and resistor heating dynamically shift RF transmit frequency to avoid interference without manual tuning.