Code Division Multiplex TRIZ Cases

Baseband polarization-vector estimation lets linear antennas handle circular satellite signals with lower polarization loss and interference.

Orthogonal linear antennas use baseband vector estimation and PA/LO calibration to transmit circularly polarized signals with lower polarization loss.

Orthogonal linear antennas estimate polarization vectors and calibrate PAs and LO signals to transmit circular polarization with lower loss.

Horizontal and vertical antennas reconstruct circularly polarized signals through vector estimation and calibration, reducing polarization loss.

A switched NCO and cascaded integrators interpolate CAZAC chirps to cut DAC quantization errors and improve distance estimation.

A switched quadratic phase generator interpolates CAZAC chirps to cut DAC quantization outliers and improve wireless distance estimation.

FFT-based loopback synchronization refines timing and frequency offsets with interpolation and double linearization, even at low SNR.

A bolt-on spread-spectrum overlay hides legacy RF signals below the noise floor to resist detection, jamming, and geolocation.

Orthogonal cover codes let multiple terminals share one uplink resource block, cutting retransmission load and improving NTN spectrum use.

Sequence selection between computer-generated, Gold, and ZC signals lowers pi/2-BPSK PAPR and improves uplink power amplifier efficiency.

Controlled overlap between non-orthogonal frequency resources reduces grant-free access interference while supporting more transmitting devices.

UE-specific spreading, scrambling, and resource mapping help separate overlapping NoMA transmissions and improve multi-UE decoding.

A diode-detector path handles normal reception, while a PLL path activates only when blockers appear to cut receiver power use.

Conditional DCI field interpretation enables OCC and MCS handling only when thresholds are met, reducing uplink control overhead and latency.

Semi-static OCC setup with DCI-based index indication lets NB-IoT NTN uplinks multiplex more UEs on NPUSCH with limited signaling.

Two-dimensional orthogonal reference signals enable faster channel estimation and suppress OFDM inter-carrier interference under delay and Doppler shifts.

Synchronous CDMA codes let aircraft sensor nodes transmit simultaneously with higher data rates and stronger rejection of Wi-Fi and Bluetooth interference.

Reverse sequence processing changes interference patterns before antenna combining, preserving desired signals and stabilizing demodulation.

Code-domain multiplexing lets low-power IoT devices share random access slots with fewer collisions, faster response, and better resource use.

Phase-coded FMCW chirps use codebook-selected phase sequences to mitigate interference between nearby vehicle radars and preserve target detection.

Uses enhanced DMRS port and OCC association to manage larger NR antenna port sets without degrading throughput or communication quality.

Terminal location selects cyclic shifts and root sequences within cell segments, reducing cross-correlation interference and improving mMTC preamble detection.

CSI-RS and SRS provide channel-sparsity information to guide DMRS estimation, improving NR MIMO accuracy with limited statistical inputs.

Varying chirp slopes and frequency offsets helps automotive radars limit mutual interference and improve target detection reliability.

Prime-factor sequence construction with Golay complementary pairs expands sequence quantities beyond powers of two for distinct low-ambiguity detection.

Matrix extensions generate larger sequence sets with improved auto-correlation and cross-correlation for more reliable communication.

Channel-aware scrambling protects common delay information from interference, improving uplink synchronization across satellite-cell terminals.

This case applies cover codes to polar codewords, reducing cross-correlation for earlier decoding termination and lower receiver power use.

Unit sequences identify interference sources despite varied bandwidths and frequency carriers during atmospheric ducting.

This case spreads DMRS portions across time and frequency to preserve flat response and channel estimation at wide SCS.

This case combines complementary pair waveforms across time, frequency, and sectors to reduce hardware while preserving Doppler resolution.

A timed sequence of short codes narrows the search for encrypted long codes, enabling faster fixes during brief LEO satellite visibility.

This case uses adaptive spreading factors and DSSS to protect low-speed automotive Ethernet reception from noise and EMI.

This case combines CAZAC sequences with OFDM operations to improve long-range signal robustness while simplifying demodulation.

CAZAC and SME signal blocks spread energy across time and frequency, simplifying demodulation for robust wide-area reception.

This communication case maps DMRS parameters to RE quantities, helping base stations and user equipment calculate TBS accurately.

This case uses OCC spreading factors and scaling to adapt PUSCH transport block size across 5G NR uplink conditions.

This case uses segmented comb-index assignments to multiplex SRS across more than four ports while managing configuration complexity.

Frequency domain differential detection estimates initial carrier frequency offset in OFDM systems using phase reference symbols and FFT outputs.

Varying sampling intervals via pseudo-random sequences reduces cyclostationarity, resolving synchronization difficulties while maintaining high data throughput.

A MIMO system merges pilot signals with data slots using orthogonal codes for simultaneous transmission and reception.

Excluding ±du and ±2du cyclic shifts reduces false alarm rates while maintaining detection accuracy for user equipment traveling above 300 km/h.

Cyclic shifts on Zadoff-Chu sequences reduce peak-to-average power ratio, aligning reference signal power with data signals.

Combining CAZAC codes and Hadamard codes for block-wise spreading improves orthogonality between multiple user equipments, reducing intra-cell interference.

Base stations generate dynamic Pseudo-Noise sequences using time-dependent initial seeds to mitigate atmospheric ducting interference in 5G networks.

Digital chaotic sequence generator synchronizes receiver signals using residue number system arithmetic.

A receiving device aligns code word phases with spread spectrum signals by measuring despread signal amplitudes to determine phase differences.

Base stations detect spread spectrum scheduling requests from user equipments to grant spectral resources only when needed.

Segmenting resource blocks into distinct portions enables generation of orthogonal demodulation reference signals for uplink transmission.

Dividing antenna ports into groups using multiplexing maintains orthogonality, enabling accurate channel estimation beyond four-port limits.

Switching to DFT-s-OFDM reduces peak-to-average power ratio while orthogonal cover codes maintain channel estimation precision.

Superimposing a spread spectrum pilot signal on data symbols maintains payload throughput while enabling robust carrier tracking and channel estimation.