Results 31 to 40 of about 2,215 (138)
Terrain and Radiation Mapping in Post-Disaster Environments Using an Autonomous Helicopter
Remote Sensing, 2012 Recent events have highlighted the need for unmanned remote sensing in dangerous areas, particularly where structures have collapsed or explosions have occurred, to limit hazards to first responders and increase their efficiency in planning response ...
Kevin Kochersberger +2 more
doaj +1 more source
Hotspot wireless LANs to enhance the performance of 3G and beyond cellular networks [PDF]
, 2003 At present, WLANs supporting broadband multimedia communications are being developed and deployed around the world. Standards include HIPERLAN/2 defined by ETSI BRAN and the 802.11 family defined by the IEEE.
Armour, SMD +4 more
core +2 more sources
EURASIP Journal on Advances in Signal Processing, 2004 This paper deals with optimized channel coding for OFDM transmissions (COFDM) over frequency-selective channels using irregular low-density parity-check (LDPC) codes.
Gelle Guillaume +2 more
doaj +1 more source
Tool for efficient intermodulation analysis using conventional HB packages [PDF]
, 1999 A simple and efficient approach is proposed for the intermodulation analysis of nonlinear microwave circuits. The algorithm, which is based on a very mild assumption about the frequency response of the linear part of the circuit, allows for a reduction ...
Filicori, F., Traverso, P., Vannini, G.
core +1 more source
Low Power Implementation of Non Power-of-Two FFTs on Coarse-Grain Reconfigurable Architectures [PDF]
, 2005 The DRM standard for digital radio broadcast in the AM band requires integrated devices for radio receivers at very low power. A System on Chip (SoC) call DiMITRI was developed based on a dual ARM9 RISC core architecture.
Quevremont, Jérôme +4 more
core +1 more source
Robust video broadcasting over 802.11a/g in time-correlated fading channels [PDF]
, 2009 In order to deliver video streams efficiently over WiFi to many thousands of consumer handheld devices, broadcast protocols must be employed. In this mode of operation the received video quality can deteriorate rapidly as a result of high application ...
Bull, David +4 more
core +2 more sources
Guangtongxin yanjiu, 2007 编码正交频分复用（COFDM）是一种多载波数字通信调制技术,其基本原理是将频域中的一个宽带信道划分成多个重叠的子信道进行窄带传输。在接收端,虽然频谱相互重叠,但是只要保证各子信道上信号的正交性,就可以将各信道上的信号正确分离。文章重点研究了COFDM通信系统中的同步技术。
黄瑞, 邹辰
doaj
A software and hardware evaluation of revolutionary turbo MIMO OFDM schemes for 5 GHz WLANs [PDF]
, 2003 Globally, WLANs operating in the 5 GHz band have been standardized by the IEEE (North America), ETSI (Europe) and ARID (Japan). A harmonized physical layer is specified offering up to 54 Mbits/s using rate adaptive coded orthogonal frequency division ...
Abdul Aziz, MK +6 more
core +2 more sources
Multichannel receivers from ofdm and tdma in mobile communications [PDF]
, 1997 This paper addresses the use of multichannel receivers for blind equalization in TDMA under frequency selective channels and OFDM systems in frequency flat fading channels.
Lamarca Orozco, M. Meritxell +1 more
core +1 more source
The Only Way into Digital Audio Broadcasting
Tongxin xuebao, 1995 A new kind of radio-digital audio broadcasting is presented,application and evolution of digital audio broadcasting as well as in the world.Based on the international,experiences ,some possible ways are proposed on development of digital audio ...
孙金荣, 李晓芳
doaj +2 more sources