Timing Synchronization Method for Continuous Phase Frequency Shift Keying Signal Based on Multi-symbol Detection
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摘要: 连续相位频移键控(CPFSK)作为遥测体制标准被广泛采纳。多符号检测(MSD)技术能够降低CPFSK信号的解调门限，这要求CPFSK定时同步方法能够在更低的信噪比条件下正常工作。针对现有的CPFSK定时同步方法在低信噪比下同步困难的问题，该文提出一种基于MSD的CPFSK定时同步方法，且适应可变符号速率CPFSK信号接收。数值仿真结果表明，在Eb/N0为0 dB，符号速率为2 Mbps的情况下，该方法的误比特率性能比传统单符号间隔似然检测同步方法提高2 dB；与MSD迟早门时延同步方法性能相近，但消耗的硬件资源不及后者的40%。原理样机实测结果验证了数值仿真和资源评估的正确性。Abstract: Continuous Phase Frequency Shift Keying (CPFSK) is widely adopted as a standard by the telemetry community. The Multi-Symbol Detection (MSD) technique can increase channel gain for the CPFSK telemetry system. Therefore, the timing synchronization method for CPFSK signal needs to adapt to the scenario with lower SNR. According to existing timing synchronization methods’ poor performance in low SNR, a novel timing synchronization method for CPFSK signal based on MSD is proposed, which is suitable to variable rate. The simulation results show that, when Eb/N0 is 0 dB and symbol rate is 2 Mbps, the proposed method achieves 2 dB more channel gain than the single symbol likelihood decision method, and has similar performance to the early-late gate code synchronization method with reduced hardware resource by 60%. Finally, the validity of the numerical simulation and resource evaluation is verified by principle prototype realization.
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表 2 硬件资源占用情况
硬件资源 基于MSD的迟早门时延同步 基于MSD的CPFSK定时同步方法 节省资源(%) 查找表 33236 4648 86.02 寄存器 27700 4217 84.78 RAM (bit) 30480 11904 60.94 9×9 DSP单元 424 42 90.09 
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廉昕, 王元钦, 侯孝民, 等. 一种脉冲超宽带测控信号捕获方法[J]. 电子与信息学报, 2017, 39(8): 2000–2006 doi: 10.11999/JEIT161213LIAN Xin, WANG Yuanqin, HOU Xiaomin, et al. Acquisition scheme for impulse radio UWB TTC signal[J]. Journal of Electronics&Information Technology, 2017, 39(8): 2000–2006 doi: 10.11999/JEIT161213 钟凯, 彭华, 葛临东. 基于FABA-SISO的时变频率选择性衰落信道CPM信号盲均衡[J]. 电子与信息学报, 2015, 37(11): 2672–2677 doi: 10.11999/JEIT150026ZHONG Kai, PENG Hua, and GE Lindong. Blind equalization based on FABA-SISO for continuous phase modulation signals over time-varying frequency-selective fading channels[J]. Journal of Electronics&Information Technology, 2015, 37(11): 2672–2677 doi: 10.11999/JEIT150026 Range Commanders Council Telemetry Group. IRIG Standard 106-15 telemetry standards[S]. 2015. LEE Sangrae and RA Sungwoong. Variable cutoff frequency pre-modulation filter for PCM/FM transmission system[J]. IEICE Transactions on Communication, 2008, E91-B: 1387–1396. 闫冬, 孙晓锋, 孙大元. MSD与TPC技术调频遥测方法研究[J]. 无线电工程, 2016, 46(4): 79–82 doi: 10.3969/j.issn.1003-3106.2016.04.20YAN Dong, SUN Xiaofeng, and SUN Dayuan. Research on PCM-FM technology based on MSD and TPC[J]. Radio Engineering, 2016, 46(4): 79–82 doi: 10.3969/j.issn.1003-3106.2016.04.20 LIU Ying, ZHENG Haixin, ZHAO Renliang, et al. Design and evaluation of multi-GPU enabled multiple symbol detection algorithm[J]. The Journal of Supercomputing, 2016, 72(6): 2111–2131. 赵楠. 统一扩频测控系统中关键技术研究[D]. [博士论文], 哈尔滨工业大学, 2011.ZHAO Nan. Research on key techniques in unified spread spectrum TT&C system[D]. [Ph.D. dissertation], Harbin Institute of Technology, 2011. 付刚, 侯孝民, 郑海昕, 等. 一种基于MSD的同步方法[J]. 无线电工程, 2012, 42(11): 26–28FU Gang, HOU Xiaomin, ZHENG Haixin, et al. A synchronization method based on MSD frequency[J]. Radio Engineering, 2012, 42(11): 26–28 骆希. 基于最大似然算法的CPM信号符号同步和解调[D]. [硕士论文], 电子科技大学, 2009.LUO Xi. A based on the maximum likelihood algorithm of symbol synchronization and demodulation of CPM signal[D]. [Master dissertation], University of Electronic Science and Technology of China, 2009. 党小宇, 刘兆彤, 李宝龙, 等. 物理层网络编码中连续相位调制信号的非相干多符号检测[J]. 电子与信息学报, 2016, 38(4): 877–884 doi: 10.11999/JEIT150671DANG Xiaoyu, LIU Zhaotong, LI Baolong, et al. Noncoherent multiple symbol detection for continuous phase modulation in physical-layer network coding[J]. Journal of Electronics&Information Technology, 2016, 38(4): 877–884 doi: 10.11999/JEIT150671 WU Zhilu, ZHAO Nan, LI Shuying, et al. A novel PCM/FM multi-symbol detection algorithm for FPGA implementation[J]. Information Technology Journal, 2009, 8(4): 583–588. 谢顺钦, 钟声, 范靖, 等. 大动态PCM/FM信号的载波频率同步[J]. 电讯技术, 2017, 57(3): 276–281 doi: 10.3969/j.issn.1001-893x.2017.03.005XIE Shunqin, ZHONG Sheng, FAN Jing, et al. Carrier frequency synchronization for large dynamic PCM/FM signals[J]. Telecommunication Engineering, 2017, 57(3): 276–281 doi: 10.3969/j.issn.1001-893x.2017.03.005 XIE Xu and XU Zhengguang. Comparison of feedforward synchronization schemes for full-response CPM signals[J]. IEEE Access, 2017, 5: 27376–27383 doi: 10.1109/ACCESS.2017.2777005 HOSSEINI E and PERRINS E. The Cramer-Rao bound for training sequence design for burst-mode CPM[J]. IEEE Transactions on Communication, 2013, 61(6): 2396–2407 doi: 10.1109/TCOMM.2013.042313.120426 DONG Yingying, LI Fuqin, and XU Zhengguang. Simple timing recovery algorithm for binary CPFSK based on phase unwrapping[J]. Electronic letters, 2014, 50(23): 1755–1757 doi: 10.1049/el.2014.0845 -
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