Báo cáo hóa học: " Research Article Feedback Reduction in Uplink MIMO OFDM Systems by Chunk Optimization" pdf

... pages doi:10.1155/2008/597072 Research Article Feedback Reduction in Uplink MIMO OFDM Systems by Chunk Optimization Eduard Jorswieck, 1 Aydin Sezgin, 2 Bj ¨ orn Ottersten, 1 and Arogyaswami Paulraj 2 1 ACCESS Linnaeus ... optimization of the MIMO OFDM MAC under individual power constraints and under chunk constraints. In order to reduce the feedback overhead b...

Ngày tải lên: 22/06/2014, 19:20

... suboptimal. Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 597072, 14 pages doi:10.1155/2008/597072 Research Article Feedback Reduction in Uplink MIMO ... optimization of the MIMO OFDM MAC under individual power constraints and under chunk constraints. In order to reduce the feedback overhead by informing t...

Ngày tải lên: 22/06/2014, 06:20

... 2 M  p t−1 k + 2 M    r 2t k   2 +   r 2t+1 k   2  (27) with initial value  p 0 k = 1. The metrics in (22) related with coordinate interleaved STB symbols are not suitable for Viterbi decoding. Substitut- ing (23 )in( 22) and using (11), the metrics in ... coordinate inter- leaving to MIMO- OFDM which shows that this technique provides considerable diversity gain without si...

Ngày tải lên: 22/06/2014, 06:20

... Lozano, and R. Valenzuela, “Network MIMO: overcoming intercell interference in indoor wireless systems, ” in Proceedings of the 41th Asilomar Conference on Signals, Systems and Computers, pp. 83–87, ... ρ k C), where  N t,k and ρ k are obtained using (13)and(14)as(since 12 EURASIP Journal on Advances in Signal Processing and in part by SSF within the Strategic Research Cent...

Ngày tải lên: 21/06/2014, 09:20

... z in Corollary 2.8 to get other new results. Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 2009, Article ID 807943, 12 pages doi:10.1155/2009/807943 Research Article Univalence ... April 2009 Recommended by Vijay Gupta The main object of the present paper is to investigate univalence and starlikeness of certain integral operators, which are defined h...

Ngày tải lên: 21/06/2014, 20:20

... pages doi:10.1155/2008/125735 Research Article Interference Mitigation in Cooperative SFBC -OFDM D. Sreedhar and A. Chockalingam Department of Electrical Communication Engineering, Indian Institute of Science, ... methods using distributed space-time coding are widely being researched [5, 6]. Recent investigations on cooperative communications focus on space-time cooperative systems...

Ngày tải lên: 22/06/2014, 01:20

... The performance 1 Coding is not considered in this paper. It has been shown that coded bit loading OFDM systems also greatly outperform coded OFDM systems in point-to-point networks [17]. Here, ... original work is properly cited. 1. INTRODUCTION In cooperative systems, a group of single-antenna nodes transmits as a “virtual antenna array,” obtaining diver- sity gain without re...

Ngày tải lên: 22/06/2014, 19:20

... coordinate inter- leaving to MIMO- OFDM which shows that this technique provides considerable diversity gain without significant in- crease of encoding and decoding complexities was proposed by Rao ... 2 M  p t−1 k + 2 M    r 2t k   2 +   r 2t+1 k   2  (27) with initial value  p 0 k = 1. The metrics in (22) related with coordinate interleaved STB symbols are not suitable f...

Ngày tải lên: 22/06/2014, 19:20

... Layzer’s feedback AM instrument is shown in Figure 1. This instrument is now investigated in detail by interpreting it as a periodically linear time-variant filter. The basic FBAM equation with feedback ... 4: Nonlinear Waveshaping. An interesting modification of the FBAM algorithm can be implemented by employing a nonlinear mapping of the feedback path, a process commonly known a...

Ngày tải lên: 21/06/2014, 07:20

... November 2006. [23] C. Simon and G. Leus, “Adaptive feedback reduction for precoded spatial multiplexing MIMO systems, ” in Proceedings of the International ITG/IEEE Workshop on Smart Antennas (WSA ... Journal on Advances in Signal Processing FH y N S N T N R ν s + Feedback link Figure 1: System model of the linear precoded spatial multiplexing MIMO system with limited feedbac...

Ngày tải lên: 21/06/2014, 22:20