[PDF] Top 20 Bit Loading Algorithms for Cooperative OFDM Systems

... form bit loading algorithms and calculate the total minimum transmission ...the cooperative transmission between the source node and the destination ... See full document

... communication systems is the bit and power loading, which is addressed in this article as a constrained multivariable nonlinear optimization ...of loading problems, namely, rate maximization ... See full document

... allocation, bit loading and sub-carrier bandwidth sizing are addressed individually, and then as a joint problem, for both single and multiple SU scenarios; the objective being-maximization of the SU’s ... See full document

... and bit error performance of wireless ...Thus, cooperative communication technique has been introduced to allow single-antenna devices to cooperate and create a virtual (or distributed) MIMO system in such ... See full document

... The short cycle problem degrades the BER performance which tends to improve very slowly with the number of iterations, even at very high SNR [14], [17].With message passing algorithms,a cycle free factor graph ... See full document

... allocation algorithms were derived for both real-time and non-real-time services in multiuser OFDM- based CR ...tiuser OFDM-based CR system was maximized while satisfying the SUs’ proportional rate ... See full document

... In this paper, PSO [12], [13], [14] has been modified and applied to minimize the total transmit power to allocate sub– carriers and number of bits for multi–user OFDM systems. The modifications are done in ... See full document

... The BER performance of the LS [3],[5] estimation, DFT based CE and MMSE estimation, LMMSE estimation, DD-LMMSE, Proposed Algorithm is shown in the Figure 5. Because of the effect of the noise, the BER performance of LS ... See full document

... communication systems. Modern video communication systems currently adopt cooperative communication and orthogonal frequency division multiplexing (OFDM) as they are an attractive solution to ... See full document

... high bit rates seen before on a single carrier is reduced to lower bit rates on the ...practice, OFDM signals are generated and detected using the Fast Fourier Transform ...algorithm. OFDM has ... See full document

... benefits of these antennas into a practical realizable MIMO communication system is very challenging. The cost of integrating and implementing the functionality of the reconfigurable antennas into the system and their ... See full document

... includes algorithms for source coding, channel coding, interleaving, modulation, equalization, synchronization, and channel ...for bit error rate analysis, generating eye and constellation diagrams, and ... See full document

... the bit-error-rate (BER) of orthogonal frequency division multiplexing (OFDM) systems in frequency-selective slowly fading channels of Rayleigh ... See full document

... in cooperative OFDM systems, and proposed a low-complexity interference mitigation ...proposed algorithms, the performance of the CO-SFBC-OFDM was better than OFDM without ... See full document

... and bit error rates, MIMO-OFDM should be combined with adaptive bit loading (ABL) and forward error correction (FEC) coding, where the former is particularly apt for moderate mobility as ... See full document

... total bit rate in OFDM systems is ...and bit rate of each subcarrier can also be taken into ...and bit rate of each subcarrier. In an OFDM system with N subcarriers the ... See full document

... Power Line Communication (PLC) technology has re- ceived a great amount of research interest in the last decade. This technology exploits the already existing and ubiquitous power line distribution infrastructure to pro- ... See full document

... ABSTRACT: Cooperative wireless communication relay networks in OFDM-based systems have been shown to improve performance in various systems using digital modulation techniques as a form of ... See full document

... Copyright © 2010 Paloma Garc´ıa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the ... See full document

... To get better performance and power saving, in this paper, we combine power loading and phase shift. This process is done by utilizing channel response information, which is a complex quantity. The channel gain ... See full document