<rt id="wsywy"></rt>
OFDM(正交頻分復用)技術實際上是MCM(Multi-Carrier Modulation，多載波調制)的一種。其主要思想是，將信道分成若干正交子信道，將高速數據信號轉換成并行的低速子數據流，調制到在每個子信道上進行傳輸。正交信號可以通過在接收端采用相關技術來分開，這樣可以減少子信道之間的相互干擾(ICI)。每個子信道上的信號帶寬小于信道的相關帶寬，因此每個子信道上的可以看成平坦性衰落，從而可以消除符號間干擾。而且由于每個子信道的帶寬僅僅是原信道帶寬的一小部分，信道均衡變得相對容
標簽： Multi-Carrier Modulation OFDM MCM
上傳時間： 2017-09-03
上傳用戶：skfreeman
Cuncurrent java development. Threads and synchronization
標簽： synchronization development Cuncurrent Threads
上傳時間： 2013-12-21
上傳用戶：mikesering
Tutorial of use Threads in Delphi.
標簽： Tutorial Threads Delphi use
上傳時間： 2017-09-18
上傳用戶：ecooo
nice document about the fast manipulation of multi-dimensional arrays in matlab,with some examples to avoid loops and using indices
標簽： multi-dimensional manipulation document examples
上傳時間： 2014-01-23
上傳用戶：edisonfather
Lukas Kanade Multi resolution program in matlab language.
標簽： resolution language program Kanade
上傳時間： 2017-09-25
上傳用戶：athjac
Example code in Delphi to use MessageWait method to synchronize threads. Example code include delphi project files.
標簽： Example code MessageWait synchronize
上傳時間： 2013-12-12
上傳用戶：chongcongying
introduction in java threads class
標簽： introduction threads class java
上傳時間： 2013-12-23
上傳用戶：fandeshun
Multi-carrier modulation? Orthogonal Frequency Division Multi- plexing (OFDM) particularly? has been successfully applied to a wide variety of digital communications applications over the past several years. Although OFDM has been chosen as the physical layer standard for a diversity of important systems? the theory? algorithms? and implementation techniques remain subjects of current interest. This is clear from the high volume of papers appearing in technical journals and conferences.
標簽： COMMUNICATIONS MULTI-CARRIER DIGITAL
上傳時間： 2020-05-31
上傳用戶：shancjb
Since the principle of multi-carrier code division multiple access (MC-CDMA) was simultaneously proposed by Khaled Fazel et al. and Nathan Yee et al. at the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) in the year 1993, multi-carrier spread spectrum (MC-SS) has rapidly become one of the most wide spread independent research topics on the field of mobile radio communications. Therefore, the International Workshop on Multi-Carrier Spread Spectrum (MC-SS) was initiated in the year 1997. Multi-carrier and spread spectrum systems with their generic air interface and adaptive technologies are considered as potential candidates to fulfill the requirements of next generation mobile communications systems.
標簽： Multi-Carrier Spectrum Spread 2007
上傳時間： 2020-05-31
上傳用戶：shancjb
Notwithstanding its infancy, wireless mesh networking (WMN) is a hot and growing field. Wireless mesh networks began in the military, but have since become of great interest for commercial use in the last decade, both in local area networks and metropolitan area networks. The attractiveness of mesh networks comes from their ability to interconnect either mobile or fixed devices with radio interfaces, to share information dynamically, or simply to extend range through multi-hopping.
上傳時間： 2020-05-31
上傳用戶：shancjb
