針對CDMA系統多徑衰落信道條件下采用MATLAB仿真軟件對單用戶RAKE接收機和多用戶RAKE接收機之間分別進行了仿真。并采用最大比合并、等增益合并、選擇式合并這三種合并方式進行比較。給出仿真結果及誤碼率性能參數。通過比較三種合并方式的比較得出最大合并比方式更適合RAKE接收機。通過單用戶與多用戶RAKE接收機的比較,得出RAKE接收機更適合于多用戶情況。并通過多用戶間的比較得出增多用戶對同狀態下信噪比要求增加不大。
上傳時間: 2013-04-24
上傳用戶:stewart·
·詳細說明:移動通信的仿真和軟件無線電(Simulation and Software Radio for Mobile Communications_by Harada),一本仿真的英文好書,包括PSK,OFDM,CDMA,蜂窩系統,以及軟件無線電仿真。
上傳時間: 2013-07-26
上傳用戶:ABCD_ABCD
·詳細說明:雙音多頻(DTMF)信號發生器的使用源程序,vc 編寫,與《雙音多頻(DTMF)接收器的使用源程序》聯合用- The double sound multi- frequencies (DTMF) the signal generating device use source program, the vc compilation, (DTMF) Receiver Use Source p
上傳時間: 2013-07-23
上傳用戶:tianjinfan
16×16點陣(滾動顯示)論文+程序.rar cdma通信系統中的接入信道部分進行仿真與分析.rar LED顯示屏動態顯示和遠程監控的實現.rar MCS-51單片機溫度控制系統.rar USB接口設計.rar 畢業設計(論文)OFDM通信系統基帶數據.rar 倉庫溫濕度的監測系統.rar 單片機串行通信發射機.rar 單片機課程設計__電子密碼鎖報告.rar 單片機控制交通燈.rar 還有很多·············
上傳時間: 2013-04-24
上傳用戶:huazi
ADC需要FFT處理器來評估頻譜純度,DAC則不同,利用傳統的模擬頻譜分析儀就能直接 研究它所產生的模擬輸出。DAC評估的挑戰在于要產生從單音正弦波到復雜寬帶CDMA信 號的各種數字輸入。數字正弦波可以利用直接數字頻率合成技術來產生,但更復雜的數字 信號則需要利用更精密、更昂貴的字發生器來產生。 評估高速DAC時,最重要的交流性能指標包括:建立時間、毛刺脈沖面積、失真、無雜散 動態范圍(SFDR)和信噪比(SNR)。本文首先討論時域指標,然后討論頻域指標。
上傳時間: 2013-10-27
上傳用戶:Vici
Abstract: The MAX3108 is a complete high-performance universal asynchronous receiver-transmitter (UART) in a tiny 2.1mm ×
標簽: Programming Rates Baud 3108
上傳時間: 2014-12-23
上傳用戶:清風冷雨
The LT®6552 is a specialized dual-differencing 75MHzoperational amplifier ideal for rejecting common modenoise as a video line receiver. The input pairs are designedto operate with equal but opposite large-signal differencesand provide exceptional high frequency commonmode rejection (CMRR of 65dB at 10MHz), therebyforming an extremely versatile gain block structure thatminimizes component count in most situations. The dualinput pairs are free to take on independent common modelevels, while the two voltage differentials are summedinternally to form a net input signal.
上傳時間: 2014-12-23
上傳用戶:13691535575
Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.
上傳時間: 2014-12-05
上傳用戶:cylnpy
Avalanche photo diode (APD) receiver modules arewidely used in fi ber optic communication systems. AnAPD module contains the APD and a signal conditioningamplifi er, but is not completely self contained. It stillrequires signifi cant support circuitry including a highvoltage, low noise power supply and a precision currentmonitor to indicate the signal strength. The challenge issqueezing this support circuitry into applications withlimited board space. The LT®3482 addresses this challengeby integrating a monolithic DC/DC step-up converter andan accurate current monitor. The LT3482 can supportup to a 90V APD bias voltage, and the current monitorprovides better than 10% accuracy over four decades ofdynamic range (250nA to 2.5mA).
上傳時間: 2014-01-18
上傳用戶:wenyuoo
cp2012 usb驅動程序(仿真器/實驗儀通用驅動) CP2102 USB to UART Bridge Controller是由臺灣AMCO TEC International公司出的一個接口程序,一般用在一些CDMA上網卡或者無線上網卡上。 這個驅動只是提供接口芯片的驅動,如果各位是無線上網卡還需要廠家的程序支持。
上傳時間: 2013-10-17
上傳用戶:開懷常笑