中文摘要：

提出了一种基于系统外部信息转移图（EXIT）的改进分析方法,利用该方法可以选择比特交织编码调制迭代译码（BICM-ID）系统中混合调制映射的方案,与EXIT图分析方法不同,该方法利用了系统外部交互信息与整个信噪比区域变化（EMI-SNR）的对应关系.仿真结果表明,使用EMI-SNR图的分析方法,可以在BICM-ID系统中不同的信噪比区域内选择不同的混合调制映射方案,并且能粗略地估算出系统误码率曲线在不同信噪比区域内的高低变化.

英文摘要：

A new analysis method which chooses the performance of the irregular modulation mapping schemes in bit interleaved coded modulation with iterative decoding（BICM-ID） system is proposed based on the extrinsic information transfer （EXIT） chart, the difference from EXIT chart analysis method is the proposed method utilizes the corresponding relationship between the extrinsic mutual information and the whole signal to noise ratio region . The simulation results show that the proposed method can effectively choose the different irregular modulation mapping schemes in the different signal to noise ratio region and can roughly evaluate the scope of system bit error rate curve in BICM-ID system.