Subcarrier and Power Allocation for the Downlink of Multiuser OFDM Transmission
نویسندگان
چکیده
منابع مشابه
Subcarrier and Power Allocation for the Downlink of Multiuser OFDM Transmission
In this paper, a new algorithm for subcarrier and power allocation for the downlink of multiuser OFDM transmission is presented. The proposed algorithm is more stable and it offers a lower complexity and better performance than previous existing algorithms.
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Multiuser orthogonal frequency division multiplexing (OFDM) with adaptive multiuser subcarrier allocation and adaptive modulation is considered. Assuming knowledge of the instantaneous channel gains for all users, we propose a multiuser OFDM subcarrier, bit, and power allocation algorithm to minimize the total transmit power. This is done by assigning each user a set of subcarriers and by deter...
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This paper proposes a new algorithm of adaptive subcarrier allocation and bit loading for simultaneous voice and data transmission in multiuser OFDM systems. The algorithm dynamically assigns the number of subcarriers and bits/per symbol on each subcarrier for each user in a single cell. To cope with the stringent delay requirement of voice service, the subcarriers with low channel gains are as...
متن کاملAdaptive Subcarrier Assignment and Power Distribution in Multiuser OFDM Systems with Proportional Data Rate Requirement
A low complexity dynamic subcarrier and power allocation methodology for downlink communication in an OFDM-based multiuser environment is developed. The problem of maximizing overall capacity with constraints on total power consumption, bit error rate and data rate proportionality among users requiring different QOS specifications is formulated. Assuming perfect knowledge of the instantaneo...
متن کاملSubcarrier and Power Joint Allocation on the Uplink of Multiuser OFDM Systems
In this paper, we study the subcarriers and power joint allocation on the uplink of multiuser OFDM systems. We propose two subcarrier allocation schemes to improve the uplink capacity: Exhausted Best Channel Allocation(EBCA) and Rounded Best User Allocation(RBUA). The basic idea of EBCA is that subcarriers choose the user, while in RBUA users choose subcarriers. In order to improve the uplink c...
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ژورنال
عنوان ژورنال: Wireless Personal Communications
سال: 2006
ISSN: 0929-6212,1572-834X
DOI: 10.1007/s11277-006-9087-9