摘要：【中文】本发明公开了一种无线电高度表，包括：收发天线组件、微波收发组件和信号处理模块，所述收发天线组件用于通过天线发射和接收信号；所述微波收发组件用于与所述收发天线组件连接并通过所述收发天线组件进行信号的接收和发送；所述信号处理模块用于通过不同电压值的锯齿波控制信号控制所述微波收发组件进行信号的发送，以及对接收到的微波收发组件发送来的中频信号进行采样数字量化处理，并根据数字量化处理后的数字中频信号进行高度值的测量计算；所述测量计算包括获取当前输出的所述锯齿波控制信号的电压值，并根据预先保存的电压值与高度值的对应关系确定高度值测量结果。本发明的实现可以有效提高高度表的测量精度。 【EN】The invention discloses a radio altimeter, comprising: the system comprises a transceiving antenna assembly, a microwave transceiving assembly and a signal processing module, wherein the transceiving antenna assembly is used for transmitting and receiving signals through an antenna; the microwave receiving and transmitting assembly is used for being connected with the receiving and transmitting antenna assembly and receiving and transmitting signals through the receiving and transmitting antenna assembly; the signal processing module is used for controlling the microwave transceiving component to transmit signals through sawtooth wave control signals with different voltage values, performing sampling digital quantization processing on the received intermediate frequency signals transmitted by the microwave transceiving component, and performing measurement calculation on a height value according to the digital intermediate frequency signals after the digital quantization processing; and the measurement calculation comprises the steps of obtaining the voltage value of the currently output sawtooth wave control signal and determining the height value measurement result according to the corresponding relation between the voltage value and the height value which are stored in advance. The invention can effectively improve the measurement precision of the altimeter.

摘要：【中文】本发明公开了一种FIR滤波器的实现方法，包括：根据预期频率响应的通带、阻带和过渡带特点对预期频率响应进行非均匀采样，将所述预期频率响应离散化为多段频率响应之和；对所述多段频率响应中的每段频率响应利用理想矩形进行特性近似处理，获得近似处理后的预期频率响应；对所述近似处理后的预期频率响应进行求傅立叶逆变换，并根据评估确定的滤波器阶数对经过傅立叶逆变换后的预期频率响应在时域上进行离散化处理，获得时域冲击响应。本发明可以令滤波器阶数与频率抽样点数无关，并可实现频域非均匀抽样及频域随机抽样；同时还可以精确设置截止频率。 【EN】The invention discloses a realization method of an FIR filter, which comprises the following steps: non-uniformly sampling the expected frequency response according to the characteristics of a pass band, a stop band and a transition band of the expected frequency response, and discretizing the expected frequency response into the sum of multiple sections of frequency responses; performing characteristic approximation processing on each section of frequency response in the multiple sections of frequency responses by using an ideal rectangle to obtain an expected frequency response after the approximation processing; and performing inverse Fourier transform on the expected frequency response after the approximate processing, and performing discretization processing on the expected frequency response after the inverse Fourier transform on the time domain according to the evaluated and determined filter order to obtain the time domain impulse response. The invention can make the filter order irrelevant to the frequency sampling point number and can realize the frequency domain non-uniform sampling and the frequency domain random sampling; and meanwhile, the cut-off frequency can be accurately set.

摘要：【中文】本发明公开了一种宽带信号检测识别方法及装置，包括：对采样接收的宽带信号进行模数转换后对其进行多级数字信道化的滤波处理；对滤波处理后的信号进行频谱拼接与平滑处理；采用信道门限判决的方式进行信号独立频点的频率及带宽的检测，并对信号进行谐波频率剔除处理，获得符合实际要求的宽带信号的频率和带宽；对剔除处理后的信号提取信号的特征参数，将所述特征参数与预定的门限值进行比较，并根据比较结果确定有效信道内的信号的调制模式；输出检测获得的宽带信号的频率和带宽，以及信号调制模式的识别结果。本发明可以高效实现宽带信号的频率测量与带宽测量，且无需任何先验知识便能够实现宽带信号模拟/数字调制模式的识别。而且，整个实现方案具有运算量低、占用的处理资源较少等优点。 【EN】The invention discloses a method and a device for detecting and identifying broadband signals, comprising the following steps: carrying out analog-to-digital conversion on a sampled and received broadband signal and then carrying out multi-stage digital channelized filtering processing on the broadband signal; performing frequency spectrum splicing and smoothing on the filtered signals; detecting the frequency and bandwidth of the independent frequency point of the signal by adopting a channel threshold judgment mode, and removing harmonic frequency from the signal to obtain the frequency and bandwidth of the broadband signal which meet the actual requirements; extracting characteristic parameters of the signals after the elimination processing, comparing the characteristic parameters with a preset threshold value, and determining a modulation mode of the signals in the effective channel according to a comparison result; and outputting the frequency and bandwidth of the broadband signal obtained by detection and the identification result of the signal modulation mode. The invention can efficiently realize the frequency measurement and the bandwidth measurement of the broadband signal, and can realize the identification of the analog/digital modulation mode of the broadband signal without any prior knowledge. Moreover, the whole implementation scheme has the advantages of low computation amount, less occupied processing resources and the like.

摘要：【中文】本发明公开了一种铜膜声表面波滤波器钝化层的制备方法，包括以下步骤：在压电基底上制造二氧化硅层；在二氧化硅层上涂覆光刻胶；对光刻胶进行曝光显影，使光刻胶形成叉指换能器指条结构；对曝光显影后的光刻胶进行高温固化；对二氧化硅层进行刻蚀处理；在刻蚀后的材料上蒸镀金属膜；利用剥离工艺去除光刻胶及光刻胶上的金属膜。本发明通过在铜膜叉指换能器的上表面和间隙之中填充不同的钝化层，从而实现了对铜膜声表面波滤波器的保护，提高了其性能稳定性，拓展了应用领域。 【EN】The invention discloses a preparation method of a passivation layer of a copper film surface acoustic wave filter, which comprises the following steps: manufacturing a silicon dioxide layer on a piezoelectric substrate; coating photoresist on the silicon dioxide layer; exposing and developing the photoresist to form an interdigital transducer finger structure; carrying out high-temperature curing on the exposed and developed photoresist; etching the silicon dioxide layer; evaporating a metal film on the etched material; and removing the photoresist and the metal film on the photoresist by utilizing a stripping process. According to the invention, different passivation layers are filled in the upper surface and the gap of the copper film interdigital transducer, so that the protection of the copper film surface acoustic wave filter is realized, the performance stability of the copper film surface acoustic wave filter is improved, and the application field is expanded.