echo send 中文意思是什麼
echo send
解釋
回聲發送-
The method that absorb return circuit design used in power design and electromagnetic valve drive circuit, system power and operating supervision to mcu and redundancy and digital filter technology to the time interval to send wave and echo are used in system design to ensure the reliability and accuracy of measure and control system
本系統在電源設計、電磁閥驅動電路中的吸收迴路設計、系統主電源和訛u運行監控以及採集的對發射波與回波時間間隔數據採用的冗餘技術和數字濾波措施，保證了測控系統的可靠性和精確性。 -
The measurement of the time interval of ultrasonic send wave and echo used the catch method of 52 series mcu, and avoided the error that the isr save the current value of counter
超聲波發射波和回波的時間間隔的測量利用了52系列單片機的捕獲方式，避免了因為藉助于中斷服務程序來保存計數器的當前值所帶來的誤差。 -
Then the paper dicusses the implemention of the modem based on dsp, describes the parts of the modem, design and implement the circuit of the modem ' s echo cancek ring detection -, status supervise and power supply after the detailed research on the dsp ' s performance ? function, memory space and work mode. studies the device driver of the ppsm, develops the modem ' s driver, includes the idma read and write, download page, event handle, send data and receive data
隨后，論文論述基於dsp的modem的設計，對modem的總體結構進行了描述，在對系統使用的dsp晶元adsp2187的性能、功用、存儲器空間和工作模式作了細致研究后，設計和實現了modem的回聲抑制、振鈴檢測、狀態監測和電源等硬體電路，並對ppsm操作系統下外設的驅動程序進行了研究，開發了ppsm下modem的驅動程序，包括idma讀寫、下載頁面、事件處理、發送和接收數據的程序。 -
To the first one, the method of new sidelobe - suppression filter and the method of cutting big signals from the echo are put up, and the result is fine. to the second one, get the echo without earth clutters, and send it to the adaptive system as the input signal, so that the best result can be reached. finally the influence of the bad signal is given
針對旁瓣問題，提出新型旁瓣抑制濾波器方案和從回波中去除大功率信號方案，取得較好處理效果；在和相控陣處理的融合問題上，提出去除回波中地雜波的方法，為自適應處理提供較好的數據源；最後簡要分析惡劣環境對信號處理的影響。
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