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Erasure code is an efficient redundancy solution to avoid permanent data losses in distributed storage system. By using erasure code, the original data is encoded into blocks which are stored on different nodes. When one node fails, the lost data block needs to be recovered by transmitting a large number of data from helper nodes, which is called repair. Intersecting zigzag sets codes (IZS codes)...
Recently, neural minor component analysis (MCA) has attracted much attention. It has features of high calculation speed and strong fault tolerant property. In this paper, neural MCA network is applied in adaptive beam forming. In order to get over the disadvantages that MCA based beam former cannot form null steering beams at the direction of interference and avoid stagnation behavior of algorithm...
An MPMD programming model is widely used as a master-worker program or a coupling program for multiple physical models. To utilize recent high-end parallel computers having more than several thousand nodes, we propose the communication library MPMPI between different multiple sets of MPI processes in the MPMD model. In particular, we present MPMPI interfaces that include interfaces for a PGAS language...
We propose a novel two-dimensional (2-D) direction of-arrival (DOA) estimation method with automatic pair matching. Firstly, the DOAs of elevation angles can be estimated by the singular value decomposition (SVD) of the cross-correlation matrix. Then, we utilize the equation of the two transform matrices between the subspaces and array flow patterns which are corresponding to the elevation and azimuth...
This paper presents a antenna array pattern synthesis technique based on trust region unconstraint method. An attractive property of these methods lies in their numerical stability and robustness. The Hessian matrix is necessary for traditional trust region algorithms, it lead to very heavy computational load when the number of array elements is very lager. Using Broyden -- Fletcher -- Goldfarb --...
This paper propose a wideband transmit multi-beam forming method based on the focusing transform. This method is by determining the optimal focusing frequency, so that each sub-band of the wideband signal is focused on the optimal focusing frequency by using the focusing matrix, and then the conventional delay-and-sum transmit multi-beam forming algorithm is employed to complete the constant beam-width...
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