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This paper presents analysis and extension about known bounds in compressed basing on the Orthogonal Matching Pursuit algorithm. In the noiseless case, we focus on factors such as Restricted Isometry Property (RIP), Mutual Incoherence Property (MIP) and the recovery order of entries. For the noisy compressed sensing, we have proved two corollaries, exploiting the idea of noise folding, and obtained...
High altitude Platforms (HAPs) are known as a new means to provide high quality broadband applications and CDMA based IMT-2000 (3G) wireless service. For the capacity estimation of HAPs system, most previous work was restricted to the additive white Gaussian noise (AWGN) channels neglecting the effect of multipath fading. In this paper, we investigate the downlink capacity of HAPs CDMA system in ricean...
A new grouping strategy based on particle swarm optimization (PSO) is proposed for the multiuser MIMO broadcast systems in this paper. Aiming at maximizing the system capacity, the PSO algorithm is introduced to seek the best users group. Besides, two objective functions in PSO applicable for the cases of different requirements on capacity and complexity are also presented, which can be denoted as...
This article proposes a new space time cooperative diversity scheme called full feedback-based cooperative diversity scheme (FFBCD). In contrast to the conventional adaptive space time cooperative diversity schemes which utilize the feedback from only the destination node, the new scheme utilizes the feedback from both the destination node and the cooperation node. With the feedback from the destination...
In ultra-wideband impulse radio (UWB-IR) system, Rake receiver can take advantage of the high degree of diversity that results from a large number of multipath components (MPCs). In this paper, we propose a reduced-complexity selective Rake (RC-SRake) receiver scheme under ultra-wideband multipath channels. It employs a convolution based finger estimation algorithm, which has minimal complexity that...
In this paper, we propose a novel ultra-wideband (UWB) signal localization scheme under indoor multipath channel. The proposed method does not depend on line-of-sight path (LP) and is suitable for severe non line-of-sight (NLOS) condition. Simultaneously a low-complexity TOA estimation algorithm-strongest path (SP) detection by convolution is designed, which is easier to implement than LP detection...
A new predistorter based on Wiener model to linearize power amplifier with memory effects is proposed. Because a zigzag-envelope delta-impulse sequence is used for training, the parameters of linear section and nonlinear section in the predistorter can be separately obtained easily. Simulation results demonstrate the predistorter behaves very well
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