| 摘要 |
PCT No. PCT/EP95/02868 Sec. 371 Date Dec. 27, 1996 Sec. 102(e) Date Dec. 27, 1996 PCT Filed Jul. 20, 1995 PCT Pub. No. WO96/02989 PCT Pub. Date Feb. 1, 1996In order to prevent wanted signal capacity from being reduced during OFDM modulation of digital coded data, control symbol protecting intervals in the frame head of each OFDM transmission frame are larger than data symbol protecting intervals in wanted data areas of each OFDM transmission frame. The length of data symbol protecting intervals is determined during demodulation and data symbol scanning times are then determined on the thus determined length of the protecting intervals.
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