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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Copyright Year | 1972 |
| Description | Practical Implementation of Bit-Loading Schemes for Multiantenna Multiuser Wireless OFDM Systems This paper provides useful insights into the practical design of bit-allocation algorithms in multiantenna multiuser orthogonal frequency-division multiplexing (OFDM) systems. With the degrees of freedom obtained with multiple antennas and multiple subcarriers, the performance might be enhanced at the expense of a higher complexity. Since the scheduling with realistic integer mappings is an NP-complete combinatorial problem, suboptimum solutions based on the scalar product are shown to be good candidates to yield a realizable scheduler at a wireless physical layer. Additionally, a power-reuse strategy is proposed to lower the computational requirements of such a system. Besides the tradeoff between performance and complexity, there exists the tradeoff between performance and signaling. Therefore, we show that the required signaling might be reduced by a user-subcarrier clustering or by busing a scheme that forces an equal mapping for all the users at the same subcarrier, which might be well-suited if instantaneous fairness is required. The proposed strategies are evaluated for typical OFDM-based wireless LAN scenarios. |
| Starting Page | 2167 |
| Ending Page | 2167 |
| Page Count | 1 |
| File Size | 35942 |
| File Format | |
| ISSN | 00906778 |
| Volume Number | 53 |
| Issue Number | 12 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-12-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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