基于SLM的边带信息嵌入与检测方法  

Embedding and detection method of SI based on SLM

作　　者：何选森[1] 曾庆芳[1] 柴文标[1] 

机构地区：[1]湖南大学信息科学与工程学院,长沙410082

出　　处：《电子测量与仪器学报》2012年第2期150-154,共5页Journal of Electronic Measurement and Instrumentation

摘　　要：为了克服SLM算法需要单独发送边带信息的缺陷，提出了一种基于奇偶周期相位旋转不同角度以嵌入边带信息的方法。在发送端，将信号相位序列值简化为{±1，±j}，根据各子载波上数据的相位序列值，对奇周期和偶周期的相位旋转州4或不旋转以实现边带信息嵌入在发送信号中；在接收端，利用1位二进制码表示相位是否旋转，通过计算信号的模并与相邻两个周期的相位嵌入规则结合形成相位判决表以检测边带信息，利用3个奇周期（偶周期）的信号模值进行纠错。实验结果证明，在节约系统频带资源的前提下，实现了边带信息的可靠传输，并有效地降低OFDM信号的PAPR约1．8-3．4dB。In order to overcome the shortcoming of selective mapping （SLM） algorithm, which needs to send the side information （SI） additionally, a novel method to rotate the phase with different angles for embedding of SI according to the odd cycle and even cycle is proposed in this paper. At the sending end, the values of the phases sequence are simpli- fied to {＋l,＋j}, and to rotate the phase of the odd and even cycle with π/4 or 0 to accomplish the SI insertion based on the phase sequence of the data on sub-carrier. At the receiver end, to represent if the phase is rotation or not by a bit of binary code, through computing the modulus of receiving signal and combining it with the phase embedding rule of two adjacent cycles to form the phase decision table to detect the SI, and utilizing the modulus of signal of the three odd （even） cycles to realize the error correction. The experiment results show that the proposed method can reliably transmit the SI and re- duce the peak-to-average power ration （PAPR） about 1.8-3.4 dB of orthogonal frequency division multiplexing （OFDM） clcrnnl nn the nromlco nf savincr tho freqouenev resource

关 键 词：正交频分复用 峰均比 选择映射 边带信息 互补累计概率分布函数 

分 类 号：TN929.5[电子电信—通信与信息系统]