提出了一种基于正交频分复用(OFDM)的抗规则脉冲激励-长时预测声码器（RPE-LTP）压缩的端到端数据传输方法。根据RPE-LTP声码器特性，将待传输数据分别调制到正交的低频正弦载波上，用快速傅立叶逆变换运算实现信号的调制传输，调制后的波形符合声码器的时频特性。经仿真结果验证，提出的抗压缩传输方法的数据传输速率可达2.4 kb/s，误码率小于0.3 %，适合移动网络端到端实时安全语音数据传输使用。

A novel endtoend data transmission scheme based on OFDM mechanism with good robustness against the RPE-LTP vocoder in GSM voice channel is proposed. According to the character of RPE-LTP vocoder, data are modulated to orthogonal lowfrequency sinusoidal carrier. In OFDM, the modulation is done by IFFT and the modulated signals are conformed to the time and frequency characters of RPELTP vocoder. The results of simulation show that the transmission bit rate of the proposed scheme reaches 2.4 kb/s，and the bit error rate of the scheme is lower than 0.3 %. This scheme provides a new approach for realtime secure voice data transmission over GSM system.