Modulated-Carrier Systems TRIZ Cases

Adaptive Golomb-Rice coding varies the separation parameter by residual amplitude to improve lossless compression of time-series prediction residuals.

Correlation-based phase rotation offsets clock jitter between reference and feedback signals, stabilizing predistortion coefficients and reducing leak power.

Blanking edge PRBs and remapping LTE control channels fits a larger bandwidth into a smaller transmission band while meeting emission limits.

Multiple sampling points around each communication clock use a supplemental clock and majority decision to cut UART timing-shift and noise errors.

Parsing RS-frame signaling and extracting protected mobile service data helps VSB receivers stay reliable under noise and channel changes.

A wireless receiver disables digital filtering outside the analog filter's linear region to preserve band limiting and reduce bit errors.

A variable delay, XOR phase detector, and comparator form a feedback loop that corrects phase offset errors from tolerance and noise.

Geometrically spaced constellations close the Gaussian capacity gap, enabling the same throughput at lower SNR or higher data rates at equal power.

Separate digital pre-distortion on each Doherty amplifier path improves linearity and efficiency while reducing spurious emissions.

By rotating intermediate-amplitude 16QAM symbols into phase estimation, this case improves noise suppression and lowers bit error rates.

An op-amp common-mode cancellation circuit corrects differential pair skew from PCB length mismatch, restoring crossover voltage and compatibility.

Periodic RF reception and data comparison correct phase and clock offsets, improving time-of-flight distance estimation accuracy.

Single-edge differential encoding across a capacitive isolation barrier improves common-mode rejection and signal integrity.

Multiple phase detectors and a switch pick the closest phase offset to stabilize RF amplifier correction and cut power use across GSM and EDGE modes.

Non-uniform correlator spacing uses correlation asymmetry to estimate and correct GPS multipath errors with less hardware and calibration.

A loopback autocalibration scheme uses different LO frequencies and digital filtering to suppress image sidebands and LO leakage in transceivers.

Orthogonal test tones and DFT-based feedback calibrate gain imbalance, phase imbalance, DC offset, and I/Q delay mismatch in OFDM transmitters.

Current-mode CMOS transmitter design removes conversion stages to cut nonlinearity, noise, and power use while improving VGA power control linearity.

A shared I/Q and polar modulation path uses multiplexed switching to cut power use and support WLAN and Bluetooth in one modulator.

Compensation current modulates the PWM reference during frequency changes to stabilize output voltage and reduce beat-frequency noise.

A dither-based phase loop fine-tunes delay interferometers to keep DQPSK reception stable under dispersion and frequency drift.

Uses actual transmission signals to refine carrier leak and image correction, shortening radio startup without interrupting transmission.

Shared memory and processing let multi-latency transceivers support different applications with lower interleaver and coding overhead.

Separate short- and long-memory predistortion blocks adapt in real time to linearize saturated power amplifiers and cut distortion.

Phase interpolation lets a DDS generate higher-clock amplitude data than phase data, improving MRI transmission and detection reliability.

Digital edge-based frequency detection counts selection clock pulses each half cycle to handle non-50% duty clocks with lower chip area and power.

Time-domain comparison of observed and ideal OFDM peaks reveals amplifier gain compression under high peak-to-average signal conditions.

Threshold-based excursion signals are scaled and filtered to cut OFDM peaks, limit spectral regrowth, and lower amplifier cost.

Grouped entropy decoding links index and difference values to reconstruct audio signals and improve transmission efficiency in complex channels.

Discrete phase rotation in a single-channel I/Q demodulator enables directional Doppler measurement with lower hardware complexity and power use.

Using a non-integer LO-to-RF ratio with pulse selection, this case avoids harmonic pulling and reduces spurs in I/Q generation.

A wideband front-end receiver extracts multiple RAT signals at once, enabling cell search during active sessions without handover interruption.

Offset dual clocks let CABAC decoder address and memory stages overlap, cutting idle cycles and reducing bit decoding time.

Delayed comparator pulses let an infrared receiver self-shape IrDA-compliant output pulses, cutting power use and avoiding sync circuits.

Hierarchical extraction of coding identifiers improves audio data compression, decoding, and transmission efficiency in complex communication environments.

Index-guided entropy table selection improves signal coding efficiency and decoding accuracy for audio recovery in complex communication environments.

Multiple constant-envelope digital signals replace analog RF stages to cut power dissipation, spectral regrowth, and CMOS scaling limits.

A lookup table drives transmitter analog circuits from signal metrics to improve power-amplifier linearity, efficiency, and distortion control.

Multiple triangle-wave generators and frequency control create adjustable chaotic UWB sub-bands that cut power use and reduce user interference.

Piece-wise scaling and constellation rotation improve Alamouti MIMO error rates and diversity while keeping decoding manageable.

Multiple transducer/antenna pairs with orthogonal frequency coding expand SAW tag bandwidth while cutting loss in multi-sensor use.

By shifting switching harmonics outside the receive band and correcting imbalances, this mixing module cuts receiver spurs and noise.

Pilot tones sent in separate intervals estimate channel quality for antenna subsets, cutting RF-chain complexity and selection overhead.

Calibration sweeps receiver reference voltage with test patterns to find a midpoint trip level that cuts noise-induced skew in memory inputs.

Smaller adaptive sub-windows cut redundant CDMA path searches, improving handoff reliability while reducing search time and power use.

When low interference makes SIR estimates sensitive to residual frequency error, radial estimation or signal de-rotation restores power control accuracy.

Encodes two independent signals in one PWM waveform using duty cycle and frequency, cutting multiplexing overhead for automotive electronics.

Spreading signals before conversion relaxes converter linearity, suppresses spurs and noise, and preserves high dynamic range at lower cost.

Averaging-based transmitter power control suppresses output fluctuations in steady state, then bypasses averaging for faster level changes.

Counts blanked symbols to adjust correlation or threshold, enabling reliable signal detection during concurrent transmit and receive.