In this paper we first provide two new constructions for Cayley sum graphs, namely, norm-coset graphs and trace-coset graphs, and determine their second largest eigenvalues using Gaussian sums. Next, a connection between Cayley sum graphs and complex codebooks is established. Based on this, infinite families of asymptotically optimal complex codebooks are explicitly constructed. The derived Cayley sum graphs and codebooks either include some known constructions as special cases or provide flexible new parameters.
机构:
Univ Ljubljana, FMF, Jadranska 19, Ljubljana 1000, Slovenia
Univ Primorska, IAM, Muzejski Trg 2, Koper 6000, SloveniaUniv Ljubljana, FMF, Jadranska 19, Ljubljana 1000, Slovenia
Estelyi, Istvan
Pisanski, Tomaz
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机构:
Univ Ljubljana, FMF, Jadranska 19, Ljubljana 1000, Slovenia
Univ Primorska, IAM, Muzejski Trg 2, Koper 6000, Slovenia
Univ Primorska, FAMNIT, Glagoljaska 8, Koper 6000, SloveniaUniv Ljubljana, FMF, Jadranska 19, Ljubljana 1000, Slovenia
Pisanski, Tomaz
ELECTRONIC JOURNAL OF COMBINATORICS,
2016,
23
(03):
机构:
Department of Control Sci. and Eng., Huazhong Univ. of Sci. and Technol., Wuhan 430074, ChinaDepartment of Control Sci. and Eng., Huazhong Univ. of Sci. and Technol., Wuhan 430074, China
Wang, S.
Li, X.
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机构:
Department of Control Sci. and Eng., Huazhong Univ. of Sci. and Technol., Wuhan 430074, ChinaDepartment of Control Sci. and Eng., Huazhong Univ. of Sci. and Technol., Wuhan 430074, China
机构:
Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Anhui, Peoples R China
Guo, W.
Lytkina, D., V
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机构:
Siberian State Univ Telecommun & Informat Sci, Ul Kirova 86, Novosibirsk 630102, Russia
Novosibirsk State Univ, Ul Pirogova 1, Novosibirsk 630090, RussiaUniv Sci & Technol China, Hefei 230026, Anhui, Peoples R China
Lytkina, D., V
Mazurov, V. D.
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机构:
Novosibirsk State Univ, Ul Pirogova 1, Novosibirsk 630090, Russia
Sobolev Inst Math, Pr Akad Koptyuga 4, Novosibirsk 630090, RussiaUniv Sci & Technol China, Hefei 230026, Anhui, Peoples R China
Mazurov, V. D.
Revin, D. O.
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机构:
Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
Novosibirsk State Univ, Ul Pirogova 1, Novosibirsk 630090, Russia
Sobolev Inst Math, Pr Akad Koptyuga 4, Novosibirsk 630090, RussiaUniv Sci & Technol China, Hefei 230026, Anhui, Peoples R China