| 摘要 |
<p>This invention discloses a data retransmission method based on bit transform, the key of the method is that the positions of individual component bits in the data are exchanged in a selected transform manner before each time the retransmitting data is Quadrature Amplitude Modulated, the method further comprises: a) pre-set the transform manner of the untransformed data bits to 0, initial transmission uses transform manner 0 to modulate and send data; b) determine whether the retransmission is required, if not, return the step a to send new data; otherwise it is determined whether the pre-selected transform manner are all used or not, if not, select the next transform manner in turn, if yes, begin to reselect in turn from the transform manner 0; c) the positions of data bits are exchanged in selected transform manner, then the processed data bits are modulated and sent. With this method, it can reduce storage capacity and guarantee the reliability equality among individual bits within the same data symbol after retransmission many times, improve the performance of the decoder and the reliability of the data transmission.</p> |
