signal baseband 中文意思是什麼

signal baseband 解釋
信號基帶
  • signal : n 1 信號,暗號;信號器。2 動機,導火線 (for)。3 預兆,徵象。adj 1 暗號的,作信號用的。2 顯著的...
  • baseband : 基本頻帶
  1. With the established rf front - end system simulation platform, adding the digital modulated baseband signal, this paper simulated the multifold digital modulated signal ’ s transmission, such as 2ask, qpsk, and 16qam. then researches of power compression and phase noise of local oscillation influence the bit error ratio for different modulated system. the designing is satisfied multifold functions request with the high - powered and integrated broadband rf front - end

    隨后在建立的寬帶射頻前端通用模擬平臺上,加入基帶數字調制信號,對多種數字調制格式的信號在該通用平臺上的傳輸作了研究,模擬了2ask 、 qpsk和16qam等調制格式信號的發射與接收,研究了功率壓縮和本振相位噪聲對不同調制的誤碼率影響,實現了滿足多種功能要求的寬帶高性能綜合射頻前端的設計。
  2. This thesis primarily discussed the baseband processing of ss communication signal based field programmable gate array ( fpga ) asic chip

    本論文主要討論和實現了基於fpga的擴頻通信信號的基帶處理。
  3. This paper focuses on the blind code synchronization approach and spreading sequences estimation algorithm. the main results can be summarized as follows : 1. both synchronous and asynchronous dsss / bpsk baseband signal models are established

    本文重點是對盲碼同步和擴頻碼序列估計的研究,主要的工作成果如下: 1 、分同步和非同步兩種情況建立了dsss / bpsk基帶信號模型,並介紹了二種非合作式擴頻碼序列估計和解擴的方案。
  4. When the cur - cuit resets, the chip remains accepting state, works in burst mode, and adopts dpsk modulation mode. it proceeds quadrature - sampled intermediate frequency signal after the ad9057 has converted, then down - converses, despreads and demodulates. the demodulated baseband signal will be sended into scm to dispose through interrupt

    上電復位后,晶元處于接收狀態,工作在突發模式下,採用dpsk調制方式,將ad9057轉換完的中頻信號進行復正交取樣後下變頻、解擴、解調,通過中斷將解調完的基帶信號送入單片機處理;處于發送狀態時,可將數據擴頻、調制,經ad9768送出。
  5. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先,在闡述i / q正交調制基本原理的基礎上,通過對誤差矢量和鄰近通道功率泄漏的詳細分析,定性、定量地討論了各種非理想電路因素(如相位不平衡、幅度不平衡、直流偏差等)對調制器性能的影響;其次,介紹了鎖相環的工作原理和基本組成部分,包括鎖相環的設計和環路濾波器的設計,特別詳述了電荷泵鎖相頻率源;第三,介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後,對整個直接射頻調制系統進行測試,結果基本上達到了課題要求。
  6. A / d samples the intermediate frequency signal. the digital signal proceeding part based on tigersharc dsp can process the baseband digital signal including the algorithm of baseband modulation, baseband differential detection and symbol synchronization, etc. digital up converter supports interpolation filter and complex mixer

    A / d對中頻信號進行采樣,數字信號處理部分以tigersharcdsp為核心,負責基帶采樣數字信號的處理,實現基帶信號調制,基帶差分解調,符號同步的捕獲和跟蹤等演算法。
  7. Research on distortionless transmission of digital baseband signal of mine monitoring system

    礦用監控系統數字基帶信號無失真傳輸的研究
  8. The output of hdlc data package was coded by nrzi, then conducts the modulation of gmsk baseband signal through dsp. the message was correctly analyzed by sabb receiver, which proved the interconnection and intercommunication between apparatus

    產生的hdlc數據包通過nrzi編碼后,再通過dsp進行gmsk基帶信號的調制,此消息被sabb接收機正確解析,證明了設備的互連互通。
  9. Presents the development of modern signal processing techniques, a new implementation method which realizes quadrature coherent detection by direct sampling of if signal generated during the implementation of traditional quadrature coherent detection with analog elements in the form of two parallel baseband channels where in phase ( i ) and quadrature ( q ) components of ceived if singnal where, the imperfect matching of the separate channels due to the analog elements results in high phase and amplitude which meets the needs for high performance radar signal processing, the elementary principles and the implementation process for each method and concludes from simulation results to compare their features and application conditions that the new approach can satisfy of the requirements of high performance sp

    針對近年來提出的通過直接中頻采樣來實現正交相干檢波的方法,分析了其基本實現原理,並用統一的觀點解釋了迄今為止國內外基於此提出的各種實現方法;對每一實現方法的基本原理和實現過程都作了分析,並給出了計算機模擬結果;在此基礎上比較了各方法的性能指標及適應條件.理論分析和模擬結果證明,這一方法完全可以滿足高性能信號處理的要求
  10. Direct modulator converts baseband signal to rf signal without upconvertion. the system design is relatively simple compared to upconversion. so direct modulator provides adventages of compact size, low cost and low spurious response

    直接調制將基帶信號直接轉換為射頻信號,不需要二次頻率變換,與上變頻方式相比系統結構簡單,降低了對濾波器的要求,具有體積小,重量輕,成本低等明顯的優點。
  11. Analyze, design and simulate the digital down - convert frequency. first, the analogue if signal is converted to digital if signal in one a / d convertor which used passband sampling theory. the digital if signal is then passed to a pair of digital mixers operating in phase quadrature for mixing the if signal to baseband signal

    首先利用帶通采樣定理對中頻模擬信號進行a / d變換后將其混頻到基帶,然後用平方根升餘弦滾降濾波器同時完成低通濾波和匹配濾波雙重作用,以提高解調器的效率。
  12. The design and application of ad6640 and ad6624 are fully discussed in this part. the design of software module includes the parameter design for ddc filter and the baseband signal processing of dsp. and the realization of the viterbi channel decoding algorithm by dsp and the simulation of the burst at the transmitter are discussed

    模塊的硬體設計主要包括: a d轉換器、數字下變頻器( ddc )以及dsp ,詳盡討論了a d器件ad6640和ddc器件ad6624的設計和應用;模塊的軟體設計主要包括: ddc濾波器參數設計和dsp的基帶信號處理,給出了viterbi通道譯碼演算法dsp實現和發射端突發形成的模擬實現。
  13. This dissertation, basing on simulation, makes a deep research on simulating signal of gmsk ( gaussian filtered minimun frequency shift keying ) baseband modulation and demodulation in ais ( automatic identification system ) equipment. the technology related in the following makes the modulation and demodulation of baseband signal into realization by ti dsp, at the same time, provides a key technique to develop ais system inland

    本文著重對自動識別系統( ais - automaticidentificationsystem )設備的高斯濾波最小頻移鍵控( gmsk - gaussianfilteredminimunfrequencyshiftkeying )基帶調制解調信號進行了模擬研究,並在模擬的基礎上,在ti的dsp上實現了基帶信號的調制解調,為國內研製ais系統儲備了關鍵技術。
  14. With the development of software radio, the signal can be digitized at rf or if, then be received using digital beamforming in baseband, which can extremely improve the capacity and enhance anti - jamming capability of wireless communication

    隨著軟體無線電技術的發展,採用全數字處理,在基帶通過對接收和發送信號的波束賦形,可以極大提高無線通信系統的容量和抗干擾能力。
  15. There are different ways to make the bit synchronization, for example : the technique of the pilot frequency, the technique of some change about the baseband signal

    為了保證在同步傳輸系統中的位同步,有導頻及對基帶信號信號直接變換的方式,直接變換的方式中,使用線路編碼是比較常見的。
  16. In the point of - information theory ; - the - baseband binary pulse amplitude modulated ( pam ) signal transmission, via turning the nonlinear receiver ' s parameters, is studied over an additive white gaussian noise ( awgn ) channel. it is demonstrated that the channel capacity of binary communication systems, for a given signal added noise, can be maximized by optimal designed receivers. this new form of sr is referred to as psr in a broad sense

    本文研究並設計了含有雙穩態隨機共振系統作為一個接收裝置的基帶數字通信系統,在加性高斯白噪聲通道中,通過研究這個非線性接收器的性能,發現了數字信號傳輸中存在的參數調節隨機共振現象?通道容量隨著系統響應速度的增加具有一個共振峰值,並對這種非線性現象發生的基本機理進行了解釋。
  17. In the view of stochastic resonance ( sr ) and signal processing, parameter - turning sr ( psr ) theory and method is proposed and the characteristics of bistable systems are studied. the applications of psr in multi - frequency analog signal processing, digital baseband pulse - amplitude modulation signal transmission and digital carrier modulation signal transmission are investigated. this thesis has also introduced the concepts of parameter - adaptive sr and array - induced sr

    本文主要從隨機共振物理力學機理與信號處理的角度,研究了非線性雙穩態系統的數字特徵,提出了參數調節隨機共振( psr )理論和方法,並將這一理論應用到多頻模擬信號處理、數字基帶信號傳輸和數字載波調制信號傳輸中,引入了參數自適應隨機共振和陣列隨機共振系統的概念。
  18. In detail, the author narrates the function and working elements of network card, and the signal processing from baseband to if to rf, also the protocol process of medium access control ( mac ) layer

    詳細講述了網卡的功能構成、工作原理、從射頻到中頻到基帶的信號處理過程、以及媒體訪問控制層( mac )協議處理方法等。
  19. We discussed detailedly the application of parameter - induced stochastic resonance in binary baseband pulse amplitude modulated ( pam ) signal transmission. the system ' s measurements : bit error rate and channel capacity were deduced. the numerical simulation demonstrated our theoretical analyses

    我們著重討論了參數誘導的隨機共振在二進制基帶脈沖幅值調制( pam )信號傳輸中的應用,詳細推導出了衡量系統傳輸性能的誤碼率和通道容量公式,並利用模擬模型進行了數值模擬,理論分析和模擬結果非常符合。
  20. This project study the all - digital modulation and demodulation of / 4 offset differentially encoded quadrature phase shift keying ( / 4 - dqpsk ). then use / 4 - dqpsk digital modulation and baseband differential demodulation technology to implement digital signal transmission. the bite rate is 500kb / s and the intermediate frequency is 2mhz

    本課題對/ 4 - dqpsk的全數字調制解調技術進行研究,利用/ 4 - dqpsk數字調制和基帶差分解調技術實現數字信號的傳輸,實現傳輸碼率500kbps ,調制中頻2mhz 。
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