基于数字微波GRRU系统的数据压缩算法的研究  

Research of the data compression algorithm based on GRRU system

作　　者：陈旭辉[1,2] 郭见兵[1,2] 陈东进[1,2] 

机构地区：[1]武汉邮电科学研究院光纤通信技术与网络国家重点实验室,武汉430074 [2]武汉虹信通信技术有限责任公司,武汉430074

出　　处：《光通信技术》2012年第1期13-16,共4页Optical Communication Technology

摘　　要：为了提高数字微波GRRU系统的传输能力,结合GSM信号的特点,设计了一种基于ADPCM算法的压缩比为2:1的压缩算法。研究了该算法对误码的敏感度,分析了误码扩散产生的原因,并提出了解决方法。以经数字中频处理后的GSM信号为信号源,在matlab中仿真了该算法,解码后计算出的EVM指标为0.8731%,满足后续接收机的灵敏度要求。In order to improve the transmission ability of GRRU, Combined with the feature of GSM signals, designs a compression algorithm based on ADPCM algorithm with a 2：1 compression ratio ,and study the error sensitivity of the algorithm, analysis the causes of error propagation and proposes a solution, and finally simulates the ADPCM algorithm in matlab with the source of the GSM signal which has experienced the digital IF disposing, the EVM indicators calculated is 0.8731% after decoded, which meets the sensitivity requirements of the follow-up receiver.

关 键 词：自适应脉冲编码调制 数字射频拉远 误码扩散 软件仿真 

分 类 号：TN913.36[电子电信—通信与信息系统]