Dual-Hop Cooperative Transmission for Orthogonal Frequency and Code Division Multiple Access
スポンサーリンク
概要
- 論文の詳細を見る
Orthogonal frequency and code division multiplexing (OFCDM) is available as orthogonal frequency and code division multiple access (OFCDMA) by allocating subcarrier to users. OFCDMA is an efficient transmission method assigning the subcarrier and the channel code according to channel state or many different environments. However, OFCDMA is hard to apply many frequency spreading codes when it is compared with OFCDM because of the restrictive subcarriers. This problem leads to decrease the frequency diversity. Therefore we propose system that combines cyclic delay diversity (CDD) with cooperative relaying system based on OFCDMA. This system complements this restrict by spatial diversity. In addition to that, the proposed system obtains diversity gain without loss of the throughput when direct-path condition is not good.
著者
-
Song Hyoung-kyu
Ut Communication Institute Sejong University
-
Baik Jung-In
uT Communication Research Institute Sejong University
-
KANG Sung-Jin
School of EEC, Korea University of Technology and Education
関連論文
- Cooperative Transmission Technique Using Space Time Delay Code in OFDMA Uplink System(Wireless Communication Technologies)
- Low Complexity ML Detection Technique for V-BLAST Systems with DFE Decoding(Wireless Communication Technologies)
- Efficient Techniques in OFDM System with Channel Evaluation(Wireless Communication Technologies)
- Dual-Hop Transmission Scheme Based on Hierarchical Modulation in Wireless Networks
- Space-Time Cyclic Delay Diversity Encoded Cooperative Transmissions for Multiple Relays
- Computationally Efficient Joint Frequency Synchronization for OFDM-Based DVB-T
- Low-Complexity Post-FFT Fine Frequency Synchronization for OFDM
- Improved Fine Frequency Synchronization Method for OFDM-Based DRM
- Performance of Multiband OFDM System with Extra Diversity
- Improved PAPR Statistics in Multiband OFDM Systems(Wireless Communication Technologies)