Adaptive Pilot Symbol Insertion for Channel Estimation Efficiency

The patent applies dynamics by making the pilot symbol insertion pattern adaptive rather than fixed. The communication apparatus dynamically adjusts whether to insert pilot symbols based on detected channel variation. When channel conditions are stable, no pilot symbols are inserted. When variations are detected, pilot symbols are inserted at appropriate positions. This dynamic adaptation resolves the contradiction by making channel estimation accuracy improve only when necessary, thereby maintaining transmission efficiency during stable conditions while ensuring reliability during channel variations.

The patent applies parameter changes by dynamically modifying the pilot symbol insertion parameters (whether to insert, insertion positions) based on channel conditions. The system changes the parameter of pilot symbol presence/absence according to detected channel variation thresholds. This resolves the contradiction by adjusting pilot symbol usage parameters adaptively - using more pilots only when channel reliability requirements increase, thereby preserving data transmission capacity during normal conditions while ensuring reliable channel estimation when needed.

The patent applies segmentation by dividing the communication process into distinct phases: normal communication phase and channel variation response phase. During normal phase, no pilot symbols are inserted and full transmission efficiency is maintained. When channel variations (impulse noise or phase fluctuation) are detected, the system transitions to the response phase where pilot symbols are inserted at specific positions to maintain communication stability. This segmentation resolves the contradiction by ensuring communication stability measures are activated only when actually needed, rather than continuously reducing transmission efficiency.