35,136 research outputs found
Instantons on General Noncommutative R^4
We study the U(1) and U(2) instanton solutions of gauge theory on general
noncommutative . In all cases considered we obtain explicit results
for the projection operators. In some cases we computed numerically the
instanton charge and found that it is an integer, independent of the
noncommutative parameters .Comment: 14 pages, LaTeX; deleted some confusing statements in the U(1)
1-instanton case, added ref
Hybrid beamforming for single carrier mmWave MIMO systems
Hybrid analog and digital beamforming (HBF) has been recognized as an
attractive technique offering a tradeoff between hardware implementation
limitation and system performance for future broadband millimeter wave (mmWave)
communications. In contrast to most current works focusing on the HBF design
for orthogonal frequency division multiplexing based mmWave systems, this paper
investigates the HBF design for single carrier (SC) systems due to the
advantage of low peak-to-average power ratio in transmissions. By applying the
alternating minimization method, we propose an efficient HBF scheme based on
the minimum mean square error criterion. Simulation results show that the
proposed scheme outperforms the conventional HBF scheme for SC systems.Comment: IEEE GlobalSIP2018, Feb. 201
Bargaining, Revenue Sharing and Control Rights Allocation
In a two-period, double moral hazard model with incomplete contracting, this paper explores the relationship between revenue sharing and control rights. Specifically, we endogenize the allocation of both the income rights and the control rights and show why the two are often bundled together in the context of a two-party joint venture. Moreover, we study how the use of different bargaining solutions for the ex post contract renegotiation game may affect the optimal allocation of income and control rights. Our results can be used to explain the commonly observed ownership structures of equity joint ventures.
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