Báo cáo toán học: "Multi-covering Radius for Rank Metric Codes" potx

... are investigated for codes over the Galois field F 2 N defined with rank metric. The notion of multi-covering radius, a generalization of the covering radius, was introduced by Andrew Klapper [8] for binary ... V n for every m. Thus K m (n, n) = 1, for every m. What happ ens for K m (n, t), when t is n − 1? When m = 1, K 1 (n, n − 1)  1 + L n (n); For, 0 = (0 , 0, . . . , 0) wi...

Ngày tải lên: 08/08/2014, 01:20

... formulas x n = (x b n−1 + 1)/x n−2 for n odd and x n = (x c n−1 + 1)/x n−2 for n even can be re-written as x n−2 = (x b n−1 + 1)/x n for n odd and x n−2 = (x c n−1 + 1)/x n for n even; these give us a ... p 2n+1 ˜p 2n−1 = x 4n−4 1 x 2n−3 2 for n ≥ 2 (29) = −x −4n 1 x −2n+1 2 (x 2 + 1) for n ≤ −2 (30) ˜p 2 2n+1 − ˜p 2n−1 ˜p 2n+3 = x 4n−4 1 x 2n−2 2 for n ≥ 2 (31) = x −4n 1 x −2n...

Ngày tải lên: 07/08/2014, 15:22

... the case k = 5. For k > 5 the computational effort became too la r ge for a systematical treatment. Here we got only a few sporadic new bounds: six bounds for k = 6, two bounds for k = 7 and ... a k−1 ; d) can be determined manually. Clearly, for d = n any tuple is a winning tuple. For d  n − 2, we will get explicit formulas (Lemmas 10 and 11), and for smaller d, we will prov...

Ngày tải lên: 08/08/2014, 01:20

... change from the first to the second string. For example, the transition sequences for the codes in (1) are: 2, 1, 2, 1 and 2, 2, 1, 1, 2, 1, 2, 1, 1 . (2) For each 1 ≤ j ≤ n, the transition count ... occurs as a transition digit in the code. For each n, R there are many Gray codes, and one favorable characteristic for applications is a relative uniformity in the distribution of trans...

Ngày tải lên: 07/08/2014, 15:22

... distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP WCN go to http://jwcn.eurasipjournals.com/authors/instructions/ For information ... netbooks. All this need for flexibility and more “mobile” devices lead to more and more needs to afford the spectral resources that shall be able to satisfy costumers need for mo...

Ngày tải lên: 20/06/2014, 20:20

... distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP WCN go to http://jwcn.eurasipjournals.com/authors/instructions/ For information ... delay. According to the performance evaluation, we can derive the required channel bandwidth for such a mobile hotspot. Numerical results are presented to demonstrate the applicat...

Ngày tải lên: 20/06/2014, 20:20

... Fig. 3. It can be 7 closed form expressions for the optimal time allo- cation. We also obtained a closed form expression for the optimal rate allocation that is valid for spe- cific channel conditions ... be asymmetric. We derive a closed form expression of the optimal time allocation for a given ratio of the rates in all directions and for given signal-to-noise ratios of all channel...

Ngày tải lên: 20/06/2014, 20:20

... distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP WCN go to http://jwcn.eurasipjournals.com/authors/instructions/ For information ... as [61, 69,70], rely on a priori characterization of these performance metrics which are often derived from analytical models. Unfortunately, [. . . ], this approach is not always p...

Ngày tải lên: 20/06/2014, 20:20

... upon acceptance. It can be downloaded, printed and distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP Journal on Advances ... fa- vorable information for understanding SAR images. Micromotion is mainly embodied by rotation and vibration, and typical SAR micromotion targets include ground/ship-borne search antennas...

Ngày tải lên: 20/06/2014, 20:20

... desiccator for at least 1 h before weighing. Selected samples were frozen at −20 °C and lyophilized for 48 h. The effects of pH and salt on protein extraction The amount of liquid used for protein ... 2002). d N means no analysis. e Value for methionine + cysteine. f Value for glutamic acid + glutamine. g Value for tyrosine + phenylalanine. h Value for aspartic aci...

Ngày tải lên: 20/06/2014, 20:20