channel fading s in audio and video
Linear Constellation Precoding for OFDM With Maximum Multipath Diversity and Coding Gains
White Paper Orthogonal frequency-division multiplexing (OFDM) converts a frequency-selective fading channel into parallel flat-fading subchannels, thereby simplifying channel... [10 Apr 2008]
High Efficiency Wireless LAN for Multimedia Home Networks
White Paper Results of channel measurements with respect to fading effects are presented. This paper describes the problems of wireless LAN usage in the user's home with focus on media transmission.... [06 Dec 2007]
Multilevel Codes for OFDM-Like Modulation Over Underspread Fading Channels
White Paper This paper studies the problem of modulation and coding for doubly dispersive, i.e.time and frequency selective fading channels. For coherent reception with maximum likelihood decoding, it derives the code design... [18 Apr 2007]
Exploiting Path Diversity in the Link Layer in Wireless Ad Hoc Networks
White Paper This technique can reduce transmission retries and packet drop probabilities in the face of channel fading. An anycast mechanism is developed at the link layer for wireless ad hoc networks. The goal is... [30 Jun 2006]
Adaptive Joint Interference Cancellation and Space-Time Block Decoding for IEEE 802.11b WLAN Systems
White Paper Digital transmission in Wireless Local Area Networks (WLANs) according to the IEEE 802.11b standard suffers from fading, InterSymbol Interference (ISI), and Co-Channel Interference (CCI). In this paper,... [24 May 2006]
Hopping Pilots for Estimation of Frequency-Offset and Multiantenna Channels in MIMO-OFDM
White Paper In this paper a pilot-symbol-assisted modulation for carrier frequency offset (CFO) and channel estimation in orthogonal frequency-division multiplexing transmissions over multi-input multi-output frequency-selective... [26 Jul 2005]
SDM-COFDM Technologies for Broadband Wireless Access Over 100 Mbit/s
White Paper ª2 antennas can double the transmission bit rate to more than 100 Mbit/s per 18 MHz by using 64QAM with a coding rate of 3/4 in frequency selective fading environments. The proposed scheme reduces... [26 Oct 2004]
Space-Frequency Coded MIMO-OFDM With Variable Multiplexing-Diversity Tradeoff
White Paper Space-frequency coded Orthogonal Frequency Division Multiplexing (OFDM) is capable of realizing both spatial and frequency-diversity gains in multipath multiple-input multiple-output (MIMO) fading channels. [26 Oct 2004]
High-Throughput, High-Performance OFDM Via Pseudo-Orthogonal Carrier Interferometry Coding
White Paper OFDM (Orthogonal Frequency Division Multiplexing) is susceptible to poor probability of error performance in fading channels. To enhance OFDM's performance, many architectures utilize... [16 Oct 2004]
A Novel Polarization Smart Antenna
White Paper Mobile wireless channels are time varying mainly due to the MS motion, exhibiting shadowing, fading, Doppler shift, and polarization mismatch that determine the communications link performance. The Paper presented a... [25 Feb 2004]
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