This file is used to simulate performance of the FMT system with different modulation method in BASEBAND。（該程序主要實現FMT系統差分編碼下基帶誤碼率分析！）
標簽： performance modulation different simulate
上傳時間： 2013-12-27
上傳用戶：1427796291
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
To fully utilize the available spectrum for a wireless communication system it is feasible to adapt to different situations on the channel. In this paper a flexible OFDM transmitter is presented together with basic theory behind OFDM transmission. It is shown that high flexibility can be obtained with a reasonable amount Flexible BASEBAND transmitter for OFDM of additional hardware. Part of the design, the FFT-processor, has already been fabricated and measurement results are presented.
標簽： communication available feasible spectrum
上傳時間： 2016-03-23
上傳用戶：BOBOniu
清除除校準信息、SN、IMEI以外NVRAM里所有的數據 使用說明: 1.進入程序后點擊BB Chipset下拉菜單，選擇正確的BASEBAND芯片 2.點擊瀏覽按鈕，在彈出的對話框中選擇與手機軟件相對應的NVRAMDATABASE文件(SRC) 3.選擇正確的串口后點擊確定按鈕，然后把手機接到串口線上等待狀態欄顯示為PASS后即可
上傳時間： 2016-10-03
上傳用戶：410805624
Mobile communication devices like smart phones or tablet PCs enable us to consume information at every location and at every time. The rapid development of new applications and new services and the demand to access data in real time create an increasing throughput demand. The data have to be transmitted reliably to ensure the desired quality of service. Furthermore, an improved utilization of the bandwidth is desired to reduce the cost of transmission.
標簽： Architectures Processing BASEBAND Signal for
上傳時間： 2020-05-26
上傳用戶：shancjb
The growing interest for high data rate wireless communications over the last few decades gave rise to the emergence of a number of wideband wireless systems. The resulting scarcity of frequency spectrum has been forcing wireless system designers to develop methods that will push the spectral efficiency to its limit.
標簽： Algorithms BASEBAND Receiver
上傳時間： 2020-05-26
上傳用戶：shancjb
Optical communication technology has been extensively developed over the last 50 years, since the proposed idea by Kao and Hockham [1]. However, only during the last 15 years have the concepts of communication foundation, that is, the modulation and demodulation techniques, been applied. This is pos- sible due to processing signals using real and imaginary components in the BASEBAND in the digital domain. The BASEBAND signals can be recovered from the optical passband region using polarization and phase diversity tech- niques, as well as technology that was developed in the mid-1980s.
標簽： Transmission Processing Digital Optical
上傳時間： 2020-05-27
上傳用戶：shancjb
OSCILLATORS are key building blocks in integrated transceivers. In wired and wireless communication terminals, the receiver front-end selects, amplifies and converts the desired high-frequency signal to BASEBAND. At BASEBAND the signal can then be converted into the digital domain for further data processing and demodula- tion. The transmitter front-end converts an analog BASEBAND signal to a suitable high- frequency signal that can be transmitted over the wired or wireless channel.
標簽： High-Frequency Oscillator Design
上傳時間： 2020-05-27
上傳用戶：shancjb
his research aims at creating broadband tunable, fully integrated filters for the application of cognitive radio and signal classification receivers. The approach under study is the N-path filter technique which is capable of translating a BASEBAND impedance to a reference frequency creating a tunable filter. The traditional N-path filter suffers from fundamental architectural limitations, namely : a trade-off between insertion loss and out-of-band rejection, reference clock feed- through, and jammer power handling limitations. In the first approach, the fundamental trade- off of the traditional N-path filter between insertion loss and out-of-band rejection is improved by a transmission line (T-line) N-path filter technique.
上傳時間： 2020-05-31
上傳用戶：shancjb
All wireless communication standards, existing and under development, adopt or consider adopting orthogonal frequency-division multiplexing (OFDM) as the modulation technique. It is clear that OFDM has become the definitive modulation scheme in current and future wireless communication systems.
標簽： BASEBAND Receiver Design OFDM
上傳時間： 2020-05-31
上傳用戶：shancjb
