Multiple Carrier Systems TRIZ Cases

Frequency-domain I/Q correction uses mirror-frequency conjugate mixing to cut wideband transceiver complexity and power while preserving accuracy.

Mirror-frequency coefficient generation corrects I/Q mismatch in wideband transceivers while cutting correction complexity and power use.

Adjusting I/Q phase spacing to 45 degrees enables reliable 8PSK and other multilevel PSK demodulation with more precise phase and frequency control.

By reusing RX observation ADC resources, this case cuts TX feedback ADC area and power while preserving linearity for DPD.

Different chirp slopes, time offsets, and demod/remod filtering let multiple FMCW radars share one RF band with lower interference.

Sharing RX ADC clocks, references, bias, and calibration creates a compact TX observation path with lower circuit overhead and power.

Multiple FIR taps with band-specific coefficients correct frequency-dependent IQ mismatch and suppress undesired images across the signal band.

A shared FMCW waveform lets one antenna and common signal processing handle radar sensing and communications with less interference, size, and power.

LO pulse adjustment in I and Q delay circuits corrects amplitude and phase mismatch, reducing unwanted frequency components and interference.

Weak chirp packets from multiple gateways are coherently combined in the cloud to extend LPWAN coverage without raising device power.

Weak chirps from multiple gateways are coherently combined after decode failure to extend LPWAN range while preserving battery life.

Input and output mixers let a programmable DAC sweep FM signals across the full sampling range without impractical sampling speed, power, or complexity.

Multiple FPGA transceivers with scaled voltage swings are combined to generate high-speed analog output without external DAC cost or size.

Oversampled baseband Nyquist translation compares zero-frequency levels to detect obtruding aliasing signals and improve receiver tuning.

Ternary ADC sampling, correlation, and matched filtering improve UWB first-path detection while cutting power use and circuit complexity.

Periodic ternary sampling, preamble correlation, and CIR estimation let a UWB receiver filter channel noise with less power and circuitry.

Oversampled baseband translation around the Nyquist frequency reveals obtruding alias signals so receiver filtering and sampling can adapt.

Iterative gain, clipping, and phase correction balances I/Q channel mismatch in low-resolution ADC receivers to improve image rejection.

A closed-loop monitoring receiver measures and cancels carrier leakage, image lines, and intermode lines for agile, pure RF synthesis.

Two-dimensional IQ pre-distortion drives switch-mode power cells to improve RF transmitter efficiency while handling wideband signals.

Control switches let the down converter and ADC serve as both observer and receiver paths, cutting pre-distortion hardware cost.

Closed-loop digital correction suppresses LO leakage, image lines, and intermodulation in wideband single-sideband RF modulation.

Dual-direction coupling between I and Q paths corrects analog phase imbalance with minimal gain change and lower calibration power.

Analog correction of I/Q phase imbalance reduces baseband processing load, power consumption, and the need for image rejection filters.

Switchable LPF/BPF filtering lets one wideband receiver support multiple wireless standards while mitigating DC offset and flicker noise.