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The focus of this paper is on the correlative coding used to mitigate frequency offset in orthogonal frequency division multiplexing (OFDM) systems in mobile radio applications, such as 802.11a, 802.16, and digital video broadcasting (DVB) systems, e.g., DVB-CS2. This frequency offset may result due to the time variations of the channel during one OFDM symbol interval, or the transmitter and receiver...
Existing analog video broadcasting transmission systems are very sensitive to interference from other analog video signals and require high co-channel protection ratio. Terrestrial digital video broadcast systems are significantly less sensitive to noise and interference. DVB-T systems with digital COFDM modulation, multicarrier techniques and channel coding system ensure frequency spectrum efficiency...
With the advent in display technology, the 3DTV will provide a new viewing experience without the need of wearing special glasses to watch the 3D scenes. One of the key elements in 3DTV is the multi-view video coding, obtained from a set of synchronized cameras, capture the same scene from different view points. The video streams are synchronized and subsequently used to exploit the redundancy contained...
European terrestrial digital video broadcasting (DVB-T) standard has been launched based on the well knows modulation technique; orthogonal frequency division multiplexing (OFDM), which when used in conjunction with channel coding is known as COFDM. This paper will show the efficiency of COFDM in different DVB-T environments based on a compliant DVB-T simulation. An efficiency performance study of...
This paper outlines the application of orthogonal frequency-division multiplexing (OFDM) in digital communication channel, then studies the turbo codes, mentions the concatenation of turbo codes and Reed-Solomon (RS) codes and analysis the performances of the new concatenated forward error correct (FEC) scheme applied to an OFDM system based on the digital terrestrial video broadcasting (DVB-T) scheme...
The principles of orthogonal frequency division multiplexing (OFDM) modulation have been around since 1960s. However, recently, the attention toward OFDM has grown dramatically in the field of wireless and wired communication systems. This is reflected by the adoption of this technique in applications such as digital audio/video broadcast (DAB/DVB), wireless LAN (802.11a and HiperLAN2), broadband...
Orthogonal frequency-division multiplexing (OFDM) is the ubiquitous contemporary technology adopted for digital audio/video broadcasting, as well as wireless local and metropolitan area networks. Since the wireless multimedia services often have different quality-of- service requirements and their performance is sensitive to the channel conditions, the conventional fixed OFDM modulation scheme might...
Orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice for digital video broadcasting-handheld (DVB-H), which is required to operate under high mobility conditions resulting in significant Inter-carrier Interference (ICI). To mitigate ICI, several cancellation schemes have been proposed but they require reliable channel information at the receiver which is quite challenging...
The following topics were dealt with: personal communications; indoor communications; mobile radio communications; MIMO communications; wireless MAN IEEE 802.16; QoS; radio resource management in beyond 3G systems; convergence of mobile and broadcast; UWB; cognitive networks; sensor networks; ad hoc networks; wireless cellular networks; interference avoidance; antennas; 4G systems; OFDM; MC-CDMA;...
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