多模式选择的OFDM索引调制传输方案OA北大核心

In order to solve the problem that index information was limited by the number of subcarrier activation pat-terns and single signal constellation mode in orthogonal frequency division multiplexing with index modulation(OFDM-IM),a multi-mode selective OFDM index modulation transmission scheme was proposed.The proposed scheme achieved better bit error rate performance by designing distinguishable signal constellations so that the Euclidean dis-tances between adjacent constellation points within and between pattern groups were equal.In addition,the spectral effi-ciency of the system was improved by introducing full subcarrier activation patterns into the index information of multi-mode selective index modulation.Meanwhile,due to the subcarrier activation mode of the proposed scheme matching bi-nary digits,the system could adopt a low complexity log likelihood ratio detection algorithm and maintained good bit er-ror rate performance.Theoretical analysis and simulation results show that the proposed scheme effectively improves spectral efficiency and maintains good bit error rate performance compared with OFDM-IM,OFDM-SSIM and MMS-OFDM-IM transmission schemes in additive Gaussian white noise channel and Rayleigh fading channel.