摘要
针对矿井无线传输信道信号传输损耗大、传输距离短、传输信道窄、噪声干扰大、传输能力有限、语音信号信噪比低的特点，通过对井下透地传输中语音信号和噪声的分析，基于语音压缩技术提出了一种用于矿井无线透地通信中语音信号压缩的模型。并采用实时通信系统的动态仿真软件Systemview对压缩方案模型进行仿真，验证了压缩方案的可行性。测试结果表明：当语音信号频率在800～3000Hz范围内，抽样频率是4～6倍的最大频率语音信号时，压缩方案基本可以满足设计要求。
Aiming at the problems existed in mine wireless transmission channel, such as great transmission loss, short transmission distance, narrow transmission channel, great noise jamming, limited transmittability and low speech signal SNR （Signal to Noise Ratio）, and based on speech compression technology, a speech signal compression model was proposed for mine through - the - earth communication, through analyzing the speech signal and noise signal, and based on the speech compression, this paper proposes a model for mine wireless voice signal compression. The compression scheme model was simulated with Systemview, a real time communication system dynamic simulation software, to verify the feasibility of the scheme. The test results show that, compression scheme can meet the design requirements when the speech signal frequency is within the range of 800 - 3000Hz and the sampling frequency is 4 - 6 times of the speech signal with maximum frequency.
出处
《煤炭工程》
北大核心
2014年第3期20-22,25,共4页
Coal Engineering
基金
山西省自然科学基金资助项目(2013011019-2)
