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.
Optimal power allocation design for maximizing minimum rate of the reverse link of CDMA systems with QoS constraints is investigated in this paper. Majorization theory is the underlying mathematical theory on which our method hinges. We show that the optimal solution can be easily obtained with majorization theory for specific hyperplanes. Then, we propose a numerical search algorithm, which reduces...
In this paper, an orthogonal multiple access scheme is considered for different users with different quality of service (QoS) requirements. Therefore, the users are multiplexed using orthogonal frequency division multiple access (OFDMA) transmission. A multiple-input multiple-output (MIMO) antenna system is considered between the base-station (BS) and the existing mobile sets (MSs). In order to realize...
In multiuser MIMO systems, the achievable system data rate as well as quality of service (QoS) of individual users is limited by the inter-user interference (IUI). The interference balancing issue via power allocation can be usually formulated as a nonconvex optimization problem which will become more intractable with nonconvex QoS constraints. In this paper we focus on the challenging QoS-aware optimal...
In this paper, we have formulated the problem of cross layer throughput-maximized dynamic resource management with guaranteed QoS in MIMO OFDM beamforming systems. In order to reduce of the amount of feedback information and computation complexity, OFDM subcarriers are grouped into subchannels based on the fact that adjacent subcarriers experience the same fading. According to characteristics of various...
A novel power allocation and adaptive modulation algorithm for MIMO systems over time varying fading channel is proposed. Using water-filling theory in space domains, the optimal power allocation and adaptive MQAM by singular values of the channel transfer matrix with average transmit power constraint is obtained. The spectral efficiency is analyzed. The theoretic analysis and simulation results show...
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.