code receiver 中文意思是什麼
code receiver
解釋
代碼接收機-
Fast acquisition in pn code receiver with dsp fpga technology
的擴頻接收機快捕技術 -
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。 -
The signal format of gps is analyzed, the principle models and mathematical models are established, the ber performance is analyzed in a channel interfered with wide - bandwidth awgn, narrow - bandwidth awgn, transmitted signal, single - tone signal respectively. based on the results above interference methods are discussed and simulated. then the performance of code acquisition and code trace of a digital gps receiver are discussed. the modem of linkl 1 and link4a are modeled and their ber performances are analyzed and simulated in channel s interfered with awgn, single - tone signal and multi - tone signal respectively
建立了jtids的收發終端的數學模型，分析它在噪聲干擾、相關干擾、互相關干擾下的誤碼性能，提出較佳的干擾方法和干擾碼型，並進行模擬模擬；分析了gps的信號格式，建立了gps的原理框圖模型、信號數學模型，並對其在寬帶噪聲干擾、窄帶噪聲干擾、轉發干擾、單頻干擾等情形下的誤碼性能進行了分析比較，提出相對較佳的干擾方法，並做了計算機模擬，針對一數字式gps接收機中擴頻碼捕獲與跟蹤環的特性進行分析；建立了link11和link4a數據鏈調制解調數學模型，對它們在噪聲干擾、單音干擾、多音干擾等下的誤碼性能進行分析，最後對干擾情況進行了模擬模擬。 -
After establishing the model of intermediate frequency direct sequence spreading spectrum ( if dsss ) receiver, comparing and analyzing several conventional code acquisition methods, code and carrier two - dimension fast acquisition scheme based on two - dimension fft is proposed. finally, the situation for two targets is analyzed
首先在建立了中頻直擴接收機的模型之後，本文對常用的偽碼捕獲方法進行了詳細地分析和比較，然後提出了本文的基於二維傅立葉變換技術的快速捕獲方法，並且分析了兩個目標時的情況。 -
This paper focus on the principles of the outer code and implementation in asic ( application specific integrated circuits ) of dvb - c ( digital vision broadcasting - cable ) channel receiver
本文著重於有線視頻廣播系統（ dvb - c ）傳輸系統中外碼原理及其在專用集成電路晶元（ asic ）上的實現。 -
By complementing the proposed scheme with methods to estimate the fractional code delay, the acquisition unit an provide high quality delay estimates such that it can instead of the delay locked loop in the traditional ds receiver. after dispreading successfully, this dissertation introduces a method to estimate the doppler - shift directly from some samples based maximum likelihood estimation, and then revise it forwardly
在成功解擴之後，本文利用最大似然估計從l個樣點中直接估計出殘余多普勒頻偏，並進行前向頻偏校正，來代替傳統擴頻接收機中的科斯塔斯環，經模擬證明該方法的估計精度完全滿足解調的要求。 -
Secondly, the thesis designs a kind of scheme of simulcast base station and center base station. and the requisite requirement and chip are introduced here, and the most important controller is atmega128, the avr microcontrollers of atmel corporation. the other roles are played by voice processing circuit, simulcast broadcasting station, data transmission broadcasting station, link transmitter - receiver and gps module etc. and some theory is introduced here, which includes a / d conversion and correct code
然後，給出了一種同播基站和中心基站子系統的設計方案並簡要說明了所使用的各種設備和晶元，其中最主要的基站控制器由atmel公司的avr單片機atmega128來完成，其它的還包括語音處理電路、同播電臺、數傳電臺、鏈路機、 gps模塊等，並介紹了相關的理論知識，包括a / d轉換，糾錯編碼等。 -
Direct sequence - code divition multiple access ( ds - cdma ) technology is achieved easily and used widely at present its receiver capability is confined by two factors, one of which is the multiple access interference ( mai ) which makes the capacity low, another of which is the near - far problem
直接序列擴頻-碼分多址（ ds - cdma ）技術是最易實現、也是目前應用最廣的一種方式，它的接收性能受到兩個主要的限制：一個是多址干擾造成的性能下降；另一個則是遠近效應問題。 -
In the receiver, such code flows are divided into groups and then decoded
在接收端將這樣的碼流分組解碼后得到原始的數據。 -
* based on the test programs aiming at different devices, the basic methods for transmitter test, receiver test, system code test and interface test are concluded. according the methods, the field of the test system can be extended largely
*在針對不同被測設備程序設計基礎上，歸納出發射機測試、接收機測試、系統編譯碼測試、介面測試的基本測試方法，對今後被測設備型號擴充，有極大的借鑒意義。 -
This article works over a mathod named large step fast acquisition to capture the pn code in the receiver, which was originally put forward for the acquisition and synchronization of long pn code under the condition of low signal to noise ratio ( s / n )
本文主要研究了大步進快速捕獲法，該方法是針對低信噪比下長擴頻碼的捕獲和同步問題提出的。 -
( 3 ) the features of the low frequency time - code receiver are digital, high performance and high precision. on the basis of the testing flat of low frequency time - code, we designed a low frequency time - code receiver based on software radio
在前面已經實現的低頻時碼信號測試平臺的基礎上，對設計一種基於軟體無線電模式的低頻時碼接收終端作了初步的探討，為今後的全數字化接收機的實現打下一定的基礎。 -
A hash - based message authentication code hmac can be used to determine whether a message sent over an insecure channel has been tampered with, provided that the sender and receiver share a secret key
在發送方和接收方共享機密密鑰的前提下，基於哈希的消息驗證代碼（ hmac ）可用於確定通過不安全通道發送的消息是否已被篡改。 -
In wcdma system which uses direct sequence to spread spectrum, the spread spectrum code ( pn code ) phase of the receiver must be synchronized with that of the received signal precisely to despread and demodulate the signal correctly. multipath channel exists in the mobile communication environment for the radio signal reflection by obstacles between transmitters and receivers. by using the autocorrelation of the spread sprectrum code, rake receiver can process received signals and therefore multipath components can be resolvable
在wcdma系統中，為正確解擴解調接收到的擴頻信號，接收機本地產生的擴頻碼（ pn碼）相位必須和接收信號中的擴頻碼相位完全同步;同時移動通信環境中的傳輸信號由於接收機和發射機之間的直達路徑有可能被建築物或其他障礙物所阻礙，總是經過折射或反射的多條路徑后才到達接收機，從而產生多徑通道。 -
In the spread spectrum communication system, the synchronization of receiver ' s persedo - noise ( pn ) code to the transmitter ' s pn code is such an important part that the whole system ca n ' t work at all without it
在整個擴頻系統中，接收端對發端擴頻碼的捕獲和同步，是一項決定整個系統成敗的至關重要的技術。 -
The input video is sampled at the transmitter of the sub - system, and code stream is sent to channel after compression. at the receiver, output video is reconstructed after decompression
在發送端對輸入的視頻信號進行數字採集、壓縮，壓縮后的數據流經通道傳輸至接收端解壓縮，輸出顯示。 -
Our designs not only contain comprehensive library of different company product codes for applying every brand but also can operate varied home entertainment equipments such as tv, air conditioner, cd player, vcd, dvd satellite receiver, cable tv converter, amplifier and other audio video components. those are very friendly design and easy to use. customers only need to enter 3 digit numbers of the brand code which is listed on the instruction or use the auto search mode to set up automatically
自1993年起進入萬能遙控器市場，自行研發設計製造多功能之萬能遙控器本著精益求精的精神，除了外型不斷地創新符合潮流外，對于各廠牌之電視機錄影機選臺器碟影機擴大機衛星接收器冷氣機cd dvd vcd內碼亦不斷收錄，我們設計的萬用遙控器可以開啟市面上多數廠牌的上述家用設備。 -
There are two uncertain factor about it : the phase of the pn code and the doppler - shift. after capturing the received signal successfully, the traditional ds receiver always uses a delay locked loop ( dll ) to synchronize the pn code and then uses a costas loop to realize the carrier synchronization. this complex closed - loop structure not only take long time to realize the synchronization, but also has the defect of “ hang up ”
傳統的擴頻接收機通常在捕獲偽碼信號后利用遲早門鑒相的延時鎖定環來實現偽碼的精同步，解擴后利用科斯塔斯環實現載波同步，這種閉環結構不僅同步時間長、結構復雜，而且鎖相環還存在所謂的「 hang - up 」現象。 -
Spread spectrum code emitted by navigation station has correlative operation with the signal produced by receiver, through measuring the place of maximal correlative function, we can measure the spreading time of the navigation station ’ s signal, so we can measure the distance between navigation station and receiver
區域導航利用導航臺發射的擴頻碼與接收機產生的本地信號進行相關運算，通過測量相關函數最大值的位置，來測定導航臺信號傳播時間，從而測定導航臺到接收機的距離。 -
Design of digital spread spectrum receiver ofa high dynamic and high pn code rate
高動態高碼速率全數字化解擴接收機的設計
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