频域带限EBPSK信号正交性分析以及误码性能

随着通信系统的发展，频率资源严重不足与信息的高速可靠传输存在着日益突出的矛盾，因此高效频谱利用率的数据传输技术已成为当代通信系统追求的目标。超窄带通信技术是一种可以提供极高频谱利用率的技术，而扩展的二进制移相键控（EBPSK）正是一种重要的带通型超窄带调制技术，其采用跳变相位和跳变持续时间两个调制因素改变已调波形，是一种具有高能量利用率的新型超窄带调制技术。由于能量高度集中在中心频率周围，理论上可实现超窄带通信。研究了已调信号之间的相关性，并根据信号功率谱密度不同衰减所对应的信号衰减带宽，仿真了带限信号之间的相关系数和不同带限信号的误码率，分析了EBPSK带限信号波形样本的相关性以及误码性能。

Orthogonality and Bit Error Performance Analysis of the Band-Limited EBPSK Signal in Frequency Domain

With the development of communication system,the frequency resources of the wireless transmission system are increasingly scarce.It is much more necessary to study how to improve the frequency utilization efficiency.In order to improve the quality of communication and resolve the shortage of frequency resources,Ultra Narrow Bandwidth(UNB) is proposed as a new communication technology which can provide high spectrum efficiency.And Extended Binary Phase Key Shifting(EBPSK) is an important type of ultra narrow band-pass modulation. EBPSK is proposed as a new modulation method,based on traditional Binary Phase Shift Keying(BPSK).In theory,EBPSK is a new ultra narrow band modulation with high energyefficiency.It has phase and transition duration,the two factors changing the modulated waveform.So that ultra narrow band communication with a high concentration of energy around the center frequency could be achieved. In this paper,the correlation of modulated signal without noise were studied,as well as the different attenuation bands of power spectrum density,corresponding to different bandwidth utilization.The correlation of modulated signal and BER performance were simulated and analyzed.