Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with fading must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.
標簽: synchronization Carrier-phase multiplicativ approached
上傳時間: 2013-11-28
上傳用戶:windwolf2000
This paper investigates the design of joint frequency offset and carrier phase estimation of a multi-frequency time division multiple access (MF-TDMA) demodulator that is applied to a digital video broadcasting—return channel system via satellite (DVB-RCS). The proposed joint estimation algorithm is based on the interpolation technique for two correlation values in the frequency and phase domains. This simple interpolation technique can significantly improve frequency and phase resolution capabilities of the proposed technique without increasing the number of the correlation values. In addition, the overall block diagram of a digital communications receiver for DVB-RCS is presented, which was designed using the proposed estimation algorithms. Index Terms—Carrier phase estimation, DVB-RCS, frequency offset estimation, interpolation, joint estimation, MF-TDMA.
標簽: investigates estimation frequency carrier
上傳時間: 2015-12-30
上傳用戶:ls530720646
(1)功能模塊: A :個人開戶功能 B :查詢功能 查詢個人用戶信息 查詢各個房間使用信息 查詢寄存物品信息 C :增加寄存物品模塊 用JAVA實現賓館客房管理系統
上傳時間: 2014-01-24
上傳用戶:稀世之寶039
使用DVCC實驗系統中的并行接口芯片8255A的B口作輸入口,使工作于方式1,將PB0~PB7連接到手動開關K1~K8,將手動脈沖信號SP作為8255B口的選通信號,連接到PC2。將B品工作于方式1時的中斷請求信號(PC0)連接到8255A的IR3,8255A的片選信號無需連接(系統已連接好)。8259A的CS連接地址譯碼輸出端Y6,8259A的端口地址為60H、61H
上傳時間: 2013-12-28
上傳用戶:xinyuzhiqiwuwu
B樹
標簽: 樹
上傳時間: 2013-12-17
上傳用戶:a6697238
Specification for conveying ITU-R System B Teletext in DVB bitstreams
標簽: Specification bitstreams conveying Teletext
上傳時間: 2014-02-18
上傳用戶:mikesering
)一個PB的應用程序, 能實現以下功能: a.新增員工資料 b.修改員工資料 c.刪除員工資料 d.按姓名查找員工資料(能模糊查找, 例如輸入"林", 則所有姓或名中含有"林"字的 員工全列出來.) e.系統啟動時, 針對今天為該員工生日的, 則自動彈出提示進行祝福. 2) 員工資料的數據必須有: 工號(為主鍵), 姓名, 出生日期, 入職日期, 部門, 職務 3) 數據庫類型為ASA8.0
上傳時間: 2016-01-03
上傳用戶:BIBI
第一章 有關數論的算法 1.1最大公約數與最小公倍數 1.2有關素數的算法 1.3方程ax+by=c的整數解及應用 1.4 求a^b mod n 第二章 高精度計算 2.1高精度加法 2.2高精度減法 2.3高精度乘法 2.4 高精度除法 練習 第三章 排列與組合 3.1加法原理與乘法原理 練習 3. 2 排列與組合的概念與計算公式 練習 3.3排列與組合的產生算法 練習 第四章 計算幾何 4.1 基礎知識 4.2 線段的相交判斷 4.3尋找凸包算法 練習 第五章 其它數學知識及算法 5.1 鴿巢原理 5.2 容斥原理及應用 5.3 常見遞推關系及應用
上傳時間: 2016-01-05
上傳用戶:frank1234
2007高教社杯全國大學生數學建模競賽題目B題:乘公交,看奧運 源碼
上傳時間: 2013-11-28
上傳用戶:franktu
梯形公式計算面積近似值:In=Tn=h/2(f(a)+f(b)) 變長梯形面積:T2n=Tn/2+h/2∑f(Xk+h/2) 辛普生面積:I2n=(4T2n-Tn)/3
上傳時間: 2016-01-06
上傳用戶:qw12