电讯技术2018，Vol.58Issue(2)：152-156,5.DOI:10.3969/j.issn.1001-893x.2018.02.006
基于脉冲调制的GSM语音信道数据传输方法
A Data Transmission Method Based on Pulse Modulation over GSM Voice Channel
摘要
Abstract
Aiming at the problem that the security mechanism of Global System for Mobile Communications (GSM) can not realize end-to-end security communication,a data transmission scheme and optimization method based on pulse modulation with low complexity is proposed. Speech-like signals based on Pulse Position Modulation and Pulse Position Polarity Modulation schemes are designed respectively. The syn-chronization scheme based on time hopping pulse modulation is provided. A simulation platform of data transmission over GSM voice channel is built,and the system performances of different modulation level and adaptive multi-rate (AMR) codec with different coding rate are compared and analyzed. In order to fur-ther reduce the system error rate,the convolutional code is introduced. Simulations show that the pulse modulation with order 4 is most suitable for voice channel. The proposed pulse modulation scheme is simi-lar to the traditional Frequency Shift Keying(FSK) modulation scheme with same bit error rate(BER) but higher transmission rate,and the proposed pulse position combined with polar modulation further improves the transmission rate,with a total improvement rate of 36%.关键词
GSM语音信道/数据传输/脉冲调制/类语音信号/自适应多速率编码Key words
GSM voice channel/data transmission/pulse modulation/speech-like signal/adaptive multi-rate分类
信息技术与安全科学引用本文复制引用
徐湛..基于脉冲调制的GSM语音信道数据传输方法[J].电讯技术,2018,58(2):152-156,5.基金项目
国家自然科学基金资助项目(61402044) （61402044）
北京市科技新星计划项目(Z161100004916086) （Z161100004916086）
北京市优秀人才资助计划青年拔尖项目(2016000026833ZK08) （2016000026833ZK08）
北京市属高校"青年拔尖人才培养计划"(CIT&TCD201704065) （CIT&TCD201704065）
