Echo Effect Reduction TRIZ Cases
- PDM Filter Structure for Low-Latency Noise Reduction
Direct low-pass filtering of sigma-delta PDM signals cuts latency, improves SNR, and reduces hardware for audio and noise cancellation.
- Multi-Base-Station Audio Synchronization for Echo-Free Radio Playback
Similarity analysis aligns duplicate audio from multiple base stations to prevent IP-delay echo and superimposition in radio playback.
- Analog Domain Interference Cancellation for Wireless Receivers
An analog interference cancellation circuit subtracts reference signals from received RF waves before digitization.
- Near-Field Self-Interference Cancellation in Full Duplex Systems
A sounding signal with greater bandwidth separates near-field reflected components for accurate channel parameter estimation.
- RF Echo Cancellation for Full-Duplex Wireless Capacity
Analog RF echo cancellation suppresses transmit interference, enabling simultaneous transmission and reception over shared carriers without time-division gaps.
- Relay Apparatus Using Control Signal Reservation for Simultaneous Transmission
A relay apparatus reserves transmission paths via control signals to enable simultaneous bidirectional communication without temporal switching.
- Aircraft Communication Equalizer for Distant Echo Cancellation
Segmented equalizers process distant echoes using altitude measurements and Doppler shift calculations to cancel inter-symbol interference.