| 摘要 |
The invention relates to a method of recovering lost bits in digital transmission. The invention can be applied in ATM networks or networks in which the receiver utilizes soft decoding. A number of data bits d1-dn are transmitted together with a number of control bits c1-ck. The control bits are calculated in the transmitter using a number of parity constants p11-pkn such that a corresponding number of parity relations are fulfilled. In the receiver, the positions of the lost data bits are detected and a number of syndrome bits s1-sk are calculated from the transmitted data bits and control bits. Then the lost data bits can be recovered by mapping syndrome bits indicating the values of the lost data bits. By using the knowledge about the positions of the lost data bits a reduced number of control bits are required compared with the prior art. |
