voip的两个标准H323和SIP比较,从结构,性能,还有补充业务等方面.-voip H323 and SIP standards, structure, performance, supplementary services, etc..

dom4j使用简介及几种报文解析方式的性能比较-performance comparison using dom4j Introduction and several packets of analytical methods

Reduction of peak-to-average power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) system using the partial transmit sequence (PTS) approach. In PTS, the total search for the number of subblocks and the rotation factors must