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.
This paper investigates the problem of power efficiency for spatially multiplexed multiple-input multiple-output (MIMO) visible light communication (VLC) system. In this system, it combines the optical communication with illumination, but the offset power, which is used to satisfy the nonnegative constraint of the transmitter-side signal after precoding, leads to the reduction of power efficiency...
In view of the inconvenience brought by the current digital product copyright protection system, propose a system using the handheld device to detect the digital watermark, which used the handheld device to acquire the watermarked image willing to be detected, uploaded the image obtained to the remote special PC machine through GPRS wireless communication. The special software in PC machine finished...
Channel quality has a great influence on bit error rate (BER) of received signal. The scheme to efficiently ensure four kinds of data services provided by IEEE 802.16 standards is an interesting research issue. In this paper, we propose an adaptive scheduling algorithm cross physical (PHY) layer and MAC layer for IEEE 802.16 BWA system. The Signal to Noise Ratio (SNR) on wireless fading channels determines...
Cooperative communications can exploit distributed spatial diversity gain to improve link performance. When the message is coded at a low rate, source and relay can send different parts of a codeword to destination. This is referred to as the coded cooperation. In this paper, we propose two novel coded cooperation schemes for three-node relay networks, i.e., adaptive coded cooperation and ARQ-based...
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.