With the notable improvement of the computer technology and network technology, especially broadband communication technology, Internet technology and data compression technology significantly, multimedia communications technology has made rapid development. Multimedia applications have been deep into all aspects of our lives, and people use multimedia information as a means of communication more and more in the
(Read More…)
With the notable improvement of the computer technology and network technology, especially broadband communication technology, Internet technology and data compression technology significantly, multimedia communications technology has made rapid development. Multimedia applications have been deep into all aspects of our lives, and people use multimedia information as a means of communication more and more in the
(Read More…)
Orthogonal Frequency Division Multiplexing(OFDM)has become the key technique in broadband wireless access and the next generation mobile communication system. Extensive attentions have been paid to OFDM due to its high spectral efficiency,high data rate and well anti-multipath ability.However, there are well-known shortcomings of OFDM technology: the timing offset and frequency offset is very sensitive. Timing
(Read More…)
With the rapidly development of SS (spread spectrum) technique, SS communication is not only becoming increasingly important in the military, but also has obtained more and more extensive attention in the civilian communications in recent years. FH (Frequency Hopping) system plays an important part in the SS communication system and has gone in the fore
(Read More…)
China Mobile’s BOSS system, three-tier architecture applications, is designed mainly from the perspective of business application. The construction of the core layer of data has broken the boundaries between business systems, will include service use records, user information and other information, including all business data centrally, and data input and output are through the service
(Read More…)
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technology, which has high bandwidth efficiency and ability of coping with multipath fading makes OFDM a suitable technology for high speed wireless transmission. It’s supposed that OFDM will have an extensive application in wireless communication. It has been adopted as the physical-layer technology of several specifications.
(Read More…)
The Orthogonal Frequency Division Multiplexing (OFDM) technology is the key technology of Next Generation Mobile Communication due to its advantages such as high spectral utilization rate, high data transfer rate and the ability to oppose the multipath interference, for which it is also adopted physical layer of IEEE 802.16e protocol. For OFDM system is extremely
(Read More…)
Electronic transformers have more advantages then electromagnetic transducer, such as small in size, large dynamic range, without ferromagnetic resonance, good insulation and so on. So it will be widely adopted in intelligent substation. In this paper, the merging unit is the device of connecting electronic transformer and the second equipment in intelligent substation. So researching
(Read More…)
After the rapid development in recent years, optical fiber communication has become an important part of communication field. The advantages of optical fiber communication include: strong ability of anti-interference, large capacity of communication, good confidentiality, etc. Whether these advantages can fully exert in the process in communication depends on the development of many key technologies
(Read More…)
With the development of wireless communication,it has attracted a lot of at tentions on how to gain a high-speed and dependable data transmission with restrictions of frequency bandwidth lately.MIMO-OFDM has become a major technology in the future wireless communication for its robust ability against frequency -selective fading, realizing high-speed data transmission,huge system capacity and effectively
(Read More…)
