Mapping Optimization for Joint Source-Channel Coding/Modulation
By optimizing the mapping scheme between source and channel modulation symbols in a joint source-channel coding/modulation system,under the distortion measurement of end-to-end mean square error,the proposed scheme has better performance than that of the traditional tandem coding system.With the local optimization mapping founded by switch algorithm which is similar to the Binary Switching Algorithm,it can reach higher SNR in reconstruction and lower complexity in system realization.