二分之一连续相位切普键控及性能分析
1/2 continues phase chirp keying and performance analysis
孙志国 1王鹏宇 2李迎 1郭黎利1
作者信息
- 1. 哈尔滨工程大学信息与通信工程学院 黑龙江哈尔滨150001
- 2. 哈尔滨工程大学信息与通信工程学院 黑龙江哈尔滨150001;91913部队 辽宁大连116041
- 折叠
摘要
具有高频带利用率的新型无线数字通信技术是解决频率资源紧缺和高速率通信间矛盾的有效技术途径.本文以带通数字调制技术为研究对象,提出一种具有高能量集中度的新型数字带通调制方法一二分之一连续相位切普键控(1/2-Continous phase Chirp Keying,1/2-CPCK).1/2-CPCK利用分段式切普信号作为已调信号的波形样本,利用已调信号波形样本间频率的平滑过渡特征,实现高频带利用率的数字通信.本文构建了1/2-CPCK及己调信号功率密度谱的数学模型,分析了已调信号的能量集中度特征,仿真分析了1/2-CPCK数字通信系统的误码率特征.理论分析和仿真结果表明:1/2-CPCK已调信号具有较高的能量集中度,1/2-CPCK系统具有较高的频带利用率和较强的高斯白噪声适应能力.
Abstract
In order to solve the conflict between scarcity of the spectrum resources and the urgent demand for high capacity digital communication systems,the bandwidth efficiency of the digital communication systems should be high.In this paper,a new band-pass digital modulation technologies-1/2Continous phase Chirp Keying (1/2-CPCK),whose energy is highly concentrated,are analyzed.The segmented Chirp signals serve as the waveform samples of modulated signals,which make use of the features that frequency between modulated signals transmits smoothly to improve bandwidth efficiency.The paper introduces the mathematical models of 1/2-CPCK and its power spectral density,the energy concentration of modulated signals is analyzed.The BER of the 1/2-CPCK digital communication system is analyzed by simulation.Theoretical analysis and simulation results show that the energy and bandwidth efficiency of 1/2-CPCK are high,1/2-CPCK digital communication system has better adaptation to additive white Gaussian noise channel.
关键词
二分之一连续相位切普键控/能量集中度/频带利用率/分段型切普信号Key words
1/2-continous phase chirp keying (1/2-CPCK)/energy concentration/bandwidth efficiency/segmented chirp signals引用本文复制引用
基金项目
国家自然科学基金(61101141:)
黑龙江省自然科学基金(F201040)
出版年
2013
NETL
NSTL
维普
万方数据