Báo cáo hóa học: " Research Article Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information" potx

... Article Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information Dong Huang, 1 Zhiqi Shen, 2 Chunyan Miao, 1 and Cyril Leung 3 1 School of Computer Engineering, Nanyang ... performance degrades with increasingly poor CSI. 1. Introduction In performance analyses of wireless communication systems, it is often assumed that perfec...

Ngày tải lên: 21/06/2014, 11:20

... the radio resource reallocation algorithm. the proposed radio resource allocation algorithm. However, the radio resource of the new topology may be allocated by using the proposed radio resource ... uses the radio resource allocation algorithm to allocate radio resource unit for a given topology. A radio resource reallocation algorithm is then used to minimize...

Ngày tải lên: 21/06/2014, 05:20

... optimal resource allocation that we allocate more bandwidth and power to the new link with the best SR link. The observation is justified by examining bandwidth allocation (the power allocation follows ... the information theoretic rates. This implies that the optimization technique used in this paper can be incorporated as a building block in a variety of resource allocation...

Ngày tải lên: 21/06/2014, 18:20

... Advances in Signal Processing Volume 2007, Article ID 20542, 13 pages doi:10.1155/2007/20542 Research Article Resource Allocation with Adaptive Spread Spectrum OFDM Using 2D Spreading for Power Line ... spread-spectrum systems, synchronization, channel estima- tion, and adaptive resource allocation. He has been involved in sev- eral European and national research proje...

Ngày tải lên: 22/06/2014, 19:20

... utility in CE − average social utility in NE)/average social utility in NE † Indiv: average percentage in number of users obtaining higher individual utilities in CE than in NE. all cases with d i = ... utility in CE − average social utility in NE)/average social utility in NE † Indiv: average percentage in number of users obtaining higher individual utilities in CE th...

Ngày tải lên: 21/06/2014, 22:20

... source message without any explicit knowledge of the S → E link. 3.2. An Instantaneous Channel- Based PA. The second approach incorporates the MUD with an instantaneous channel- based PA in order to ... data processing and the system maintenance. The maintenance energy represents the “offline” energy cost that is required in order to maintain the transmitter’s infrastructure (i.e., cool...

Ngày tải lên: 21/06/2014, 05:20

... 3.4. Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 2010, Article ID 948430, 17 pages doi:10.1155/2010/948430 Research Article Generalization of an Inequality for Integral Transforms ... establish a generalization of the inequality introduced by Mitrinovi ´ candPe ˇ cari ´ c in 1988. We prove mean value theorems of Cauchy type for that new inequality...

Ngày tải lên: 21/06/2014, 07:20

... database, containing all genuine comparison scores within the same sensor, resulting in 435 600 genuine comparison scores in total (217 800 for each sensor). Comparisons that involved an image ... on a binomial distribution. Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009, Article ID 896383, 9 pages doi:10.1155/2009/896383 Research Articl...

Ngày tải lên: 21/06/2014, 19:20

... efficiency since the relays must transmit on orthogonal channels in order to avoid interfering with the source node and with each otheraswell[6]. Hence in cooperative diversity networks with M relaying ... + 1 channels are employed, which incurs a bandwidth penalty. This problem of the inefficient use of the channel resources can be eliminated with the use of the best-relay selectio...

Ngày tải lên: 21/06/2014, 22:20

... w π 1 ≥ w π 2 ≥ ··· ≥ w π K ≥ 0. By insert- ing the optimal decoding order into (8) and collecting two succeeding terms in the sum, we obtain the programming problem in (3). The optimization problem ... multiuser MIMO systems can be significantly increased by channel- aware scheduling and signal processing at the transmitters based on channel state information. In the multipleante...

Ngày tải lên: 22/06/2014, 06:20