GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
Abstract— For multi-user orthogonal frequency division multiplexing (OFDM) systems, efficient optimal rate and power allocation algorithms are presented via geometric programmin...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
— We analyze the effect of redundant parity-check equations on the error-floor performance of low-density paritycheck (LDPC) codes used over the additive white Gaussian noise (A...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
Abstract— This paper presents an Interleaver-Division Multiple Access (IDMA) based architecture with single-user decoding using parallel concatenated non-linear trellis codes (PC...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
— This paper investigates the effect of non-zero SNR margin and coding gap on the maximum sum rate and achievable rate region of the Gaussian Multiple-Access Channel (MAC). Frequ...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
Abstract— Combining multi-source cooperation and linkadaptive regenerative techniques, we develop a novel protocol capable of achieving diversity up to the number of cooperating ...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
— A new approach for the association of the well known turbo codes to modulation schemes is presented. This method is designed for flat fading channels. It presents the advantage...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
Abstract— In this paper, multiple access channels are considered in which user data rates increase with the signal-to-noise ratio (SNR). To account for channel estimation errors,...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
—We address joint estimation of frequency offsets and channel responses in OFDMA uplink. A cyclically equal-spaced, equal-energy interleaved pilot preamble is proposed by which t...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
— For the number of transmit antennas N = 2a the maximum rate (in complex symbols per channel use) of all the Quasi-Orthogonal Designs (QODs) reported in the literature is a 2a...
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
— A novel method based on Markov chain theory is proposed for analyzing the effect of feedback delay on a transmit beamforming system with limited feedback. Using this method, th...