code n. 1.法典;法規。 2.規則,準則;(社會、階級等的)慣例,習俗,制度。 3.(電)碼,代碼,密碼,暗碼;代號,略號,暗號。 4.【生物學】遺傳(密)碼。 the civil [criminal] code民[刑]法典。 the moral code道德準則。 code of signals 信號密碼(本)。 code of the school 校規。 code and conventions 規章制度。 C- Napoléon 拿破侖法典。 C- of Hammurabi (古代巴比倫的)漢穆拉比法典。 code of honour 社會禮法;決斗慣例。 code of written law 成文法典。 the International Code 國際電碼。 the Morse code 摩爾斯電碼。 vt. 1.把…編成法典[法規]。 2.把…譯成[編成]電碼;編(碼);譯(碼)。 n. -r 【自動化】編碼裝置;【電訊】記發器。
M sequence is a kind of pseudorandom code 本文對m序列(即debruijn序列)進行了研究。
As a result , pseudorandom code acquisition and tracking , carrier recovering , error correction and decoding functions are needed in the if digital receiver 因此,其中頻數字接收機需要完成偽隨機碼捕獲跟蹤、載波恢復、糾錯譯碼等功能。
Uast is equipped with the complex radar system of both continuous wave pseudorandom code phase modulation and mono - pulse amplitude comparison ( crs ) , and crs measures and gets target ' s position information 在坦克超近反導系統中,裝備偽碼調相連續波與單脈沖幅度比較復合體制雷達,用于測量目標的位置信息。
In the end , implementation of if digital receiver unit of tdrss user transponder by the method of fpga and dsp cooperation design are completed successfully , which leads to good ds - ss if receiver design for the signal whose carrier frequency is 3mhz , pseudorandom code rate is 3mchips / s , data rate is 10kbps , frequency offset is no more 1khz , and modulation mode is bpsk 最后,完成了該中頻數字接收機設計,并對其進行調試和測試。測試結果表明,該接收機能對載頻為3mhz ,頻偏不大于1khz ,偽隨機碼速率為3mchips / s ,信息碼速率為10kbps , bpsk調制的直接序列擴頻中頻信號進行接收,基本滿足設計要求。
This article analyses the signal characteristics of several typical cw radars , and presents the principle and application of doppler radar . as one focal point , this article researches the generation and math characteristics of pseudorandom code modulated signal , analyses the spectrum of pseudorandom code phase modulation radar signal , and presents this kind of signal ' s application in distance and speed measurement . this article also researches the application of mono - pulse amplitude comparison radar in angle measurement finally , this article elaborates the working process of crs in uast 本文分析了幾種典型的連續波雷達信號的特性,介紹了多普勒雷達的原理和應用;研究了偽隨機編碼信號的產生和數學特征,著重分析了偽碼調相連續波雷達信號的頻譜,及其在雷達測距、測速方面的應用;研究了單脈沖幅度比較體制在雷達測角中的應用;最后,闡述了超近反導系統中復合體制雷達的工作過程。
The pseudorandom codes have a good autocorrelation of double - values . in recent years , to solve the problems of anti - interference and the ambiguity of range and velocity , a lot of countries do much research to change the waveform of radar signal . the most important improve is to use symmetrical pulses to interrupt frequency modulated continuous wave ( fmpcw ) 早期的fmicw采用偽碼序列截斷,偽隨機碼具有良好的雙值自相關特性,其中最常用的是m序列截斷的fmicw 。近年來,為了解決抗干擾和測距、測速模糊問題,許多國家已對雷達信號波形的改進進行了研究。
Then to meet the problem of the separate between receiving and transmitting for single - station radar system in continuous wave principle , we introduced frequency modulated interrupted continuous wave ( fmicw ) . in early days , the pseudorandom codes were often used in fmicw . usually m - sequence is used to intertupt frequency modulated continuous wave 之后,為了解決連續波體制下,單站收發共址的雷達系統的收發隔離問題,又普遍采用了截斷的線性調頻連續波信號形式,叫做線性調頻中斷連續波信號( fmicw ) 。