Title :
Multilevel Control Signaling for Hybrid ARQ
Author :
Whang, Younghoon ; Hwang, Seung-Hoon
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul
Abstract :
In this paper, we propose and analyze a multi-level acknowledgement scheme for hybrid ARQ (H-ARQ) systems, which modifies a general ACK/NAK signals to represent multilevel information. For instance, the other signals except the ACK/NAK signals may be used for scheduling of retransmission in H-ARQ scheme, which results in increasing the resolution of uplink channel estimation signals. Simulation results demonstrate that, when the retransmission interval is set to optimal length, the proposed H-ARQ scheme shows 0.5-2 dB gain with properly selected parameters.
Keywords :
automatic repeat request; channel estimation; automatic repeat request; hybrid ARQ; multilevel acknowledgement scheme; multilevel control signaling; uplink channel estimation signal; 3G mobile communication; Automatic repeat request; Fading; Information analysis; Multiaccess communication; Resource management; Scheduling; Signal analysis; Signal resolution; Throughput;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.1057
