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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Lan Tang Pengcheng Zhu Yan Wang Xiaohu You |
| Copyright Year | 2002 |
| Abstract | This paper addresses a per user unitary precoding and rate control (PU2RC) system with adaptive multi-level quadrature amplitude modulation (QAM) modulation, where both the PU2RC operation and adaptive modulation are based on finite rate feedback. The system supports two transmission modes (single user transmit beamforming and multiuser transmission with orthogonal beamforming), and switches between the two modes to maximize the average throughput. We first study single user transmit beamforming, and derive closed-form expressions for the average throughput and bit-error rate (BER) with outdated channel information. Then, multiuser transmission with orthogonal beamforming is investigated. We analyze the throughput and BER performance without feedback delay in the normal signal noise ratio (SNR) regime, and the performance with feedback delay in the interference-limited regime. Simulation results demonstrate the effect of time delay, and the preferred regions of the single user transmission mode and multiuser transmission mode. |
| File Size | 748680 |
| File Format | |
| ISSN | 15361276 |
| Volume Number | 9 |
| Issue Number | 6 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Quadrature amplitude modulation Array signal processing Feedback Throughput Bit error rate Programmable control Adaptive control Amplitude modulation Delay Signal to noise ratio PU 2RC, adaptive modulation, finite rate feedback, mode selection, BER, feedback delay |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Electrical and Electronic Engineering Computer Science Applications |
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