| 基于时分处理的BOC信号通道时延标定算法 |
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| 引用本文： | 崔小准,刘庆军,米红,李懿. 基于时分处理的BOC信号通道时延标定算法[J]. 电子测量与仪器学报, 2012, 26(9): 789-793 |
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| 作者姓名： | 崔小准 刘庆军 米红 李懿 |
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| 作者单位： | 中国空间技术研究院总体部,北京,100094 |
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| 摘 要： | 卫星导航信号发射通道的设备自身时延是星地组合时延的一个部分,卫星在地面测试中必须进行通道时延标定。针对导航卫星BOC（binary offset carrier）调制导航信号发射通道绝对时延,提出了一种采用时分处理的时延标定算法。在完成导航卫星输出BOC导航信号和时间保持系统产生的秒脉冲信号双通道同步采样后,在数字域对BOC采样信号进行预处理和串并变换,将高速数据流变换为多路低速率数据流,对每路信号频率码相位捕获,从而得到BOC信号发射通道绝对时延。计算机仿真表明在采样率10 Gsa/s时提出算法的标定不确定度优于0.2 ns。
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| 关 键 词： | 导航卫星 时延测试 BOC调制 |
Delay calibration algorithm of BOC signal channel based on time division processing |
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| Cui Xiaozhun , Liu Qinjun , Mi Hong , Li Yi. Delay calibration algorithm of BOC signal channel based on time division processing[J]. Journal of Electronic Measurement and Instrument, 2012, 26(9): 789-793 |
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| Authors: | Cui Xiaozhun Liu Qinjun Mi Hong Li Yi |
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| Affiliation: | Cui Xiaozhun Liu Qinjun Mi Hong Li Yi(Institute of Spacecraft System Engineering,China Academy of Space Technology,Beijing 100094,China) |
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| Abstract: | The delay caused by navigation signal transmission channel is a component of the satellite-earth combi-nation delay and must be accurately measured at ground.As for the BOC(binary offset carrier) navigation signal transmit-ting channel,an absolute calibration algorithm based on time division processing is proposed.After the BOC navigation signal and the pulse per second(PPS) generated by time keeping system are sampled synchronously,pre-processing and serial-to-parallel convert is done in digital domain.The high rate data stream is converted into several low rate data streams.Frequency-phase acquisition is done for each low rate data streams and the absolute delay of BOC navigation signal for transmitting channel is obtained.The simulation demonstrates that the absolute uncertainty with the proposed algorithm is less than 0.2ns as the sampling frequency is 10 G Sa/s. |
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| Keywords: | navigation satellite delay measurement binary offset carrier modulation |
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