矿井通信中基于稀疏特性抑制信号高峰均比的新方法

New PAPR Reduction Method Based on Sparse Characteristic in Mine Communication

在矿井通信中传输正交频分复用(OFDM)信号,由于多载波的存在会引起较高的峰均比(PAPR),采用限幅法抑制PAPR会产生限幅噪声,为了在接收端恢复数据,需要对发射端产生的限幅噪声进行计算,提出了一种基于限幅噪声稀疏特性利用压缩感知(CS)技术计算限幅噪声的新方法。分析结果表明,这种方法能够有效抑制PAPR,保证矿井通信传输信号的准确性。

When OFDM (orthogonal frequency division multiplexing) signal is transmitted in the mine communication system, there will emerge higher PAPR(peak to average power ratio) due to the existence of the multicarrier. Using the clipping method can produce clipping noise for PAPR suppression. In order to recover data at the receiving end, the clipping noise of the emitter end needs to be calculated. A new method is put forward based on the sparse feature to calculate clipping noise through CS(compression sensing) technique. The results of analysis show that this algorithm is able to inhibit PAPR effectively, and ensure the accuracy of the signal transmitted in the mine communication.