| 引用本文: | 孙志国,李明阳,王鹏宇,郭黎利.三分之一连续相位调频键控[J].哈尔滨工业大学学报,2013,45(3):102.DOI:10.11918/j.issn.0367-6234.2013.03.019 |
| SUN Zhiguo,LI Mingyang,WANG Pengyu,GUO Lili
.1/3 continues phase chirp keying[J].Journal of Harbin Institute of Technology,2013,45(3):102.DOI:10.11918/j.issn.0367-6234.2013.03.019 |
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| 摘要: |
| 提出了一种具有高能量集中度的新型数字调制技术——1/3连续相位调频键控(1/3 Continuous Phase Chirp Keying,1/3-CPCK)．1/3-CPCK采用分段式线性调频信号作为已调信号波形样本,且已调信号相位连续、频率平滑过渡,具有较高的能量集中度,可在相对较窄的带宽内实现高速数字通信．建立1/3 CPCK调制的数学模型,分析其已调信号波形样本的相似度,及高斯白噪声条件下基于1/3-CPCK调制和相干解调的数字通信系统的误码率性能．理论推导和仿真实验证明:1/3 CPCK已调信号时域波形平滑、能量高度集中;在绝对带限情况下,当频带利用率为1 bps/Hz,信噪比为13.5 dB时,选择合适的调制系数,可使系统误码率达10-4． |
| 关键词: 三分之一连续相位调频键控 高效调制 线性调频(LFM)信号 波形相关度 能量集中度 |
| DOI：10.11918/j.issn.0367-6234.2013.03.019 |
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| 基金项目:国家自然科学基金资助项目(61101141);黑龙江省自然科学基金(F201040)； 轨道交通控制与安全国家重点实验室开放基金项目（RCS2D11K009）. |
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| 1/3 continues phase chirp keying |
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SUN Zhiguo, LI Mingyang, WANG Pengyu, GUO Lili
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(1. College of Information and Communication Engineering, Harbin Engineering University, 150001 Harbin, China;2.Beijing Jiao Tong University, The State Key Laboratory of Traffic Control and Safety, 10044 Beijing, China)
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| Abstract: |
| 1/3 continues phase chirp keying（1/3-CPCK）is proposed as a new narrow-band digital modulation scheme. 1/3-CPCK employs sectional type chirp signal as modulated signal waveform samples, of which the phase is continuous, the frequency is smooth and the energy is highly concentrated. This technique can be used in narrower band for high-speed data communication. The mathematical model of 1/3-CPCK is set up in this paper, the similarity of modulated signal waveform samples is analyzed, and the BER performance under AWGN based on coherent demodulation is presented. Theoretical derivation and simulation indicates that the waveform of 1/3-CPCK modulated signal is smooth and it has high energy concentration. When transmission bandwidth is absolutely limited, bandwidth efficiency is 1 bps/Hz and Eb/N0 is 13.5 dB, BER of 1/3-CPCK Communication system can reach 10-4 by setting proper modulation factor. |
| Key words: 1/3 Continues Phase Chirp Keying（1/3-CPCK） High efficiency modulation Linear Frequency Modulation (LFM) signal Waveform correlation Energy concentration
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