The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We investigate the spectrum sharing problem of a radio frequency (RF)-powered cognitive radio network, where a multi-antenna secondary user (SU) harvests energy from RF signals radiated by a primary user (PU) to boost its available energy before information transmission. In this paper, we consider that both the PU and SU are rational and self-interested. Based on whether the SU helps forward the PU's...
Interference alignment (IA) is a scheme to achieve degrees of freedom (DOF) of interference network at high signal-to-noise ratio (SNR). In order to implement IA scheme in frequency-division duplexing (FDD) system, receivers feedback channel state information to transmitters. The key problem is to acquire accurate transmitter channel state information (CSIT) in the presence of the quantization error...
Interference alignment (IA) is a scheme to approach the capacity at high signal-to-noise ratio (SNR) in multiuser multiple-input multiple-output (MIMO) interference networks. To implement the IA scheme in a frequency-division duplexing (FDD) system, transmitter channel state information (CSIT) is fed back from the receiver with finite bits. However, such CSIT is subject to quantization errors and...
We consider a cloud-based heterogeneous network of base stations (BSs) connected via a backhaul network of routers and wired/wireless links with limited capacity. The optimal provision of such networks requires proper resource allocation across the radio access links in conjunction with appropriate traffic engineering within the backhaul network. In this paper, we propose an efficient algorithm for...
Channel assignment and link scheduling are the key issues in wireless mesh networks with multiple interfaces and multiple channels. In this paper, we proposed a load balance link layer protocol, LBLP, which focuses on these issues aiming to improve the network capacity. The protocol, LBLP, classifies interfaces into three categories: static ones, dynamic ones and adaptive ones, with the following...
Although BICM can significantly improves the BER performance by iteration processing between the demapping and the decoding in a traditional receiver, its design and performance in PNC system has fewer studied. This paper investigates a bit interleaved coded modulation (BICM) scheme in a Gaussian two-way relay channel operated with physical layer network coding (PNC). In particular, we first present...
Optimal routing in wireless mesh networks is a challenging problem considering inter- and intra-flow interference. To solve the problem, first, we define a new routing metric, expected path bandwidth (EPBW), where the varying link rate (due to wireless channel quality) and the dynamic link load (considering the inter- and intra-flow interference) have been considered to estimate EPBW accurately. Second,...
In this paper, we focus on the interference alignment precoder design for cellular system. Varying from the traditional constrained optimization method, we reformulate the optimization problem on the complex Grassmann manifold and derive a novel steepest descent algorithm to achieve perfect interference alignment. Moreover our proposed algorithm only requires the participation of transmitter. Thus...
Multi-antenna has a great potential to improve the performance of wireless communication system due to its spatial multiplexing. In this paper, we investigate the Degrees of Freedom (DoF) of Wyner's linear asymmetric channel where each transmitter connects to its own receiver and one successive receiver. The DoF regions of Wyner's linear asymmetric channel for 2 users are provided when each node is...
As an important part of guidance system, radio compass is an integrant equipment of aircraft. The electromagnetic interference of ADF includes two aspects: one interference is from inside of ADF by conducted interference, another is from outside of ADF by radiated interference. Based on these two coupling path, this paper analysis the sensitive mechanism of ADF by the comprehensive electromagnetic...
Railway operations is closely related to people's livelihood, and the reliability, availability, maintainability and security of railway communication system are the focus and key issues of railway information construction. There are series of problems, such as the deterioration of communication performance (difficult to meet the needs of train control and train scheduling) because of the wireless...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.