Research on UWB OFDM Signal Conversion
This paper presents a multi-bit discrete time sigmadelta converter for orthogonal frequency division multiplexing ultra wide band systems adopted by IEEE 802.15.3a and ECMA368 standard. An intact scheme of timing synchronization algorithm is also proposed for the receiver. The overall sigma-delta converter consists of two modulators. The low and high subbands of signal are operated by using third-order low pass and fourth-order band pass modulator respectively. The synchronization scheme is determined by algorithm improvement and simulation that frame detection and coarse timing are implemented b the maximum correlation method based on the first-band information of the preamble and fine timing is achieved by the minimum energy ratio method based on the information of all the three bands. The simulation results show that the proposed sigma-delta converter and synchronization algorithm are well suited for orthogonal frequency division multiplexing ultra wide band system and the system has better noise shaping and BER performance.
sigma-delta UWB OFDM analog-to-digital and digital-to-analog converter timing synchronization
Yingxin Zhao Lilun Ge Shuang Wang Yuang Jin Minhao Fu Hong Wu
Department of Communication Engineering College of Information Technical Science,Nankai University T Department of Communication Engineering College of Information Technical Science, Nankai University Department of Communication Engineering College of Information Technical Science,Nankai University T Department of Communication Engineering College of Information Technical Science, Nankai University
国际会议
厦门
英文
687-691
2010-10-29（万方平台首次上网日期，不代表论文的发表时间）