On the Downlink Transmission Strategies for MIMO-OFDM Systems (Wireless Communication Technologies)
スポンサーリンク
概要
- 論文の詳細を見る
This paper addresses the downlink transmission strategies with dynamic resource allocation for multiuser MIMO-OFDM systems. The ultimate objective is to maximize the sum rate capacity subject to average power constraints. Considering that the performance of conventional Orthogonal Frequency Division Multiple Access (OFDMA) is limited by users' exclusive use to subcarrier, while Dirty Paper Coding (DPC) is capable of supporting multiple users, we propose joint subcarrier and power allocation and preceding schemes based on OFDMA combined with DPC, which is called DPC-OFDMA. The analysis is considered in two stages with channel state information (CSI) at transmitter. The first stage applies water-filling method to address subcarriers allocation, in which users are allowable to share subcarriers. The second stage employs DPC combined with preceding to deal with simultaneous transmissions of the users sharing the same subcarriers. An efficient algorithm to choose the best possible ordering of users for DPC and the optimal preceding design of each user are also involved. To reduce the complexity for practice, two simplified strategies are proposed. One is called suboptimal DPC-OFDMA, where the number of users using the same subcarrier is restricted. Another employs beamforming (BF) at every subcarrier referred as BF-DPC-OFDMA. Simulation results show that the proposed simplified strategies can approach the optimal performance for most cases, and have higher spectral efficiency than conventional time-sharing OFDMA.
- 社団法人電子情報通信学会の論文
- 2006-03-01
著者
-
Xu Youyun
Pla Univ. Sci. And Technol. Chn
-
PAN Chengkang
the Department of Wireless Communication, Nanjing Institute of Communications Engineering
-
CAI Yueming
the Department of Wireless Communication, Nanjing Institute of Communications Engineering
-
XU Youyun
the Department of Wireless Communication, Nanjing Institute of Communications Engineering
-
Cai Yueming
Institute Of Communications Engineering Pla University Of Science And Technology
-
Cai Yueming
The Department Of Wireless Communication Nanjing Institute Of Communications Engineering
-
Pan Chengkang
The Department Of Wireless Communication Nanjing Institute Of Communications Engineering
-
Xu Youyun
The Department Of Wireless Communication Nanjing Institute Of Communications Engineering
関連論文
- Impact of Channel Estimation Errors in Cooperative Transmission over Nakagami-m Fading Channels
- Iterative ICI Mitigation Method for MIMO OFDM Systems (Wireless Communication Technologies)
- Newly-Built Iterative Receiver and Hardware Implementation for V-BLAST(Wireless Communication Technologies)
- On the Downlink Transmission Strategies for MIMO-OFDM Systems (Wireless Communication Technologies)
- Outage Performance of Decode-and-Forward Relay Systems Using Imperfect MRC Receiver over Nakagami-m Fading Channels
- Performance Analysis of Opportunistic and All-Participate Relaying with Imperfect Channel Estimation
- Subcarrier Allocation for Physical-Layer Security in Cooperative OFDMA Networks