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Diversity Techniques to Combat Fading in WiMAX
White Paper In this paper, the PHY specified for the Wireless MAN-OFDM case is studied and implemented. The simulation results show that the Space-Frequency Coded system coupled with Reed-Solomon codes and... [22 Apr 2009]
Multilevel Codes for OFDM-Like Modulation Over Underspread Fading Channels
White Paper The paper uses ideas from generalized concatenation to design multilevel codes for this canonical channel model. These codes are based on partitioning a constellation carved out from the integer lattice. [18 Apr 2007]
Design of IRA Codes for Non-Coherent Detection With OFDM
White Paper This paper considers the design of a non-coherent Orthogonal Frequency-Division Multiplexing (OFDM) system for block frequency-selective fading channels with non-systematic IRA codes where the receiver... [13 Apr 2007]
Bit Interleaved Coded Modulation With Space Time Block Codes for OFDM Systems
White Paper Orthogonal Frequency Division Multiplexing (OFDM) has been shown to combat ISI extremely well by converting the frequency selective channel into parallel flat fading channels. Combination of BICM and... [11 Apr 2007]
Multi-Coded OFDM Transmission Using Pace-Time Block Codes
White Paper This paper addresses link adaptation for multi-coded OFDM transmission with space-time processing. The previously proposed algorithm of Code and Modulation (CM) selection and power loading, on a basis of temporary... [11 Apr 2007]
High Performance Viterbi Decoder for OFDM Systems
White Paper However, if the system is based on Orthogonal Frequency Division Multiplexing (OFDM) and the channel has frequency selective multipath fading, then the performance can be further improved. It is well-known that, for... [11 Apr 2007]
Innovations in Wireless Broadband Technologies
White Paper The paper addresses the last innovations in standards, related to channel estimation in high delay-spread environments, carrier allocation for optimal cell range extension and better frequency reuse when using OFDMA, SNR improvements due... [26 Jul 2005]
Spectral Spreading by Linear Block Codes for OFDM in Powerline Communications
White Paper Power Line Communication (PLC) uses the highly developed infrastructure of the electrical energy distribution network for data transmission. Measurements are showing that a broadband use of PLC channels is possible. [21 Oct 2004]
Method for using Concatenated Convolutional Turbo Codes in IEEE 802.16a
White Paper Since its discovery in 1993, a lot of research has been done in the application of turbo codes in deep space communications, mobile satellite/cellular communications, microwave links, paging, in OFDM and... [25 Feb 2004]
