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.
A novel quantize-and-forward scheme with two relays is proposed in this paper. In our scheme, each relay only processes one bit of the quantized codeword. The principle of selecting the aforementioned bit is based on the channel condition of the relay links. Compared with the single-relay scheme, the system consumes the same resources, while each relay has a prolonged life since it only transmits...
In this paper CuInS 2 solar cells have been numerically simulated based on a one-dimensional device physics simulator: Analysis of Microelectronic and Photonic Structures. Solar cells having a typical structure Al/ZnO:Al/n-CdS/p-CuInS 2 /Mo have been modeled. Various factors that affect cell performance have been studied, such as thickness and bandgap of the CuInS 2 absorber...
Recently, cognitive radio has become a hot spot, in which secondary users could use the frequency bands when primary users are absent. Hence, the detection of primary users' presence plays an important role in cognitive radio networks. In this paper, a cognitive radio network with multiple licensed users is considered. Secondary users cooperatively detect the presence of primary users using energy...
The aim of study was proposed a new control model feasible on-line implemented by Programmable Logic Controller (PLC) to enhance nitrogen removal against the fluctuation of influent in Carrousel oxidation ditch. The discrete-time control model was established by confirmation model of operational conditions based on a expert access, which was obtained by a simulation using Activated Sludge Model 2-D...
In order to control the chemical reaction process to the benefit of the direction of NOx reduction, the further research and discussion on NOx reduction mechanism with gas fuels was performed. Based on the detailed chemical kinetic mechanism of Glarborg(2000), reaction mechanism of NOx reduction (RMNR) was constructed. It consists of 362 elementary reactions and 62 chemical species and applies to...
As a new wireless network access technology, IEEE 802.16 can provide broadband Internet connection to user. However, it was found that the mandatory contention resolution scheme in IEEE 802.16 can not run perfectly in most cases, especially when the traffic is heavy. In this paper, a novel self-adaptive truncated binary exponential backoff scheme has been proposed to improve the performance of the...
To enable coexistence between an OFDM based opportunistic spectrum access system and a primary user, we proposed two novel methods called EAIC (Extended Active Interference Cancellation) and EAIC-H (EAIC-Hybrid) for spectral sculpting of OFDM signal. In EAIC and EAIC-H, cancellation signals are added to OFDM signal to cancel interference in target spectrum band caused by data tones, so that interference...
Currently, the truncated binary exponential backoff based scheme had been defined as the mandatory contention resolution scheme in WiMAX standards. However, it had been discussed in many research that these schemes can not work perfectly with WiMAX in most cases. In this paper, a novel N modules based self-adaptive contention resolution scheme has been proposed, which divides all Subscriber Stations...
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.