code acquisition造句
例句與造句
- 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。 - This paper investigates the key technology of the ds - cdma system - psendonoise ( pn ) code acquisition technology . various pn code acquisition scheme has been introduced here
本文對ds - cdma系統中的關鍵技術?擴頻序列的捕獲?進行了深入的研究，介紹了擴頻序列的多種捕獲方案。 - However , the longer length of c / a code , the more hardware resource and power it cost . this dissertation commits research on algorithm of c / a code acquisition in satellite navigation position system , and compares the acquisition means of digital differential matched filter ( ddmf ) with traditional means , and also achieves ddmf with the vhdl language and fpga platform
擴頻碼的周期的加長會給衛星導航定位系統帶來許多相應的好處,但問題也就隨著之而來了,擴頻碼的周期越長,同步捕獲所需得的時間就越長,而且若用傳統的并行捕獲方法,將極大的耗費硬件資源,而且系統功耗會隨之增大。 - At last the algorithm of ddmf is achieved by the investigation tool of altera company ? quartus ii and the vhdl language , and its ip core is also achieved which is used not only in the satellite navigation position system , but also in the long pn code dsss system . ddmf investigated in the dissertation gives a good way to design the rapid pn code acquisition in the beidou project , and the technology has the definite theory and practice significance
此外還應用altera公司的最新的fpga開發工具quartusiiv5 . 1 ,采用了國際標準的硬件描述語言? vhdl語言,對數字差動匹配濾波器和傳統匹配濾波器算法予以實現,開發了該算法的軟ip核,可以對所應用的擴頻碼長度, a / d采樣后的數據量化階數,所用擴頻碼等可進行隨意改寫。 - Because the hybrid acquisition scheme ( combines parallel search with serial search ) based on the correlator provides the flexibility in the trade - off between the mean acquisition time and system complexity and is easy to implement , it ? focus on the scheme here . on the other hand , this paper analyzes the effect of multiple access inference ( mai ) on the code acquisition performance for the multipath fading channels
基于相關器解擴的串-并混合方案由于有著可在平均捕獲時間和電路復雜程度（這是捕獲電路的兩個重要指標）這兩個技術指標間靈活折衷的優點和易于實現的特點，本文的重點就放在該方案中。 - It's difficult to find code acquisition in a sentence. 用code acquisition造句挺難的
- 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，并進行仿真模擬；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，并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，并做了計算機模擬，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，最后對干擾情況進行了仿真模擬。 - 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后,本文對常用的偽碼捕獲方法進行了詳細地分析和比較,然后提出了本文的基于二維傅立葉變換技術的快速捕獲方法,并且分析了兩個目標時的情況。