Title :
Impact of Feedback Delay on System Performance with AMC/SR-ARQ over Rayleigh Fading Channels
Author :
Hao, Dandan ; Xiao, Junfeng ; Zou, Shihong ; Cheng, Shiduan
Author_Institution :
State Key Lab. of Networking & Switching Technol., Beijing Univ. of Posts & Telecommun.
Abstract :
In cross-layered wireless networks, adaptive modulation and coding (AMC) and selective repeat-automatic repeat request (SR-ARQ) are employed to improve system performance generally. The article focuses on the impacts of feedback delay on such systems over Rayleigh fading channels. It is conducive to choosing more suitable modulation format in AMC by computing bit error rate (BER) based on the second-order statistics method when partitioning SNR levels. Accordingly, we provided N-success/N+1-failure throughput model for performance analysis in this paper. Then simulation results demonstrate that the system considering feedback delay not only does guarantee the average packet error rate (PER) constrains, but also improve system average spectral efficiency
Keywords :
Rayleigh channels; adaptive codes; adaptive modulation; automatic repeat request; error statistics; matrix algebra; radio networks; AMC-SR-ARQ; BER; Rayleigh fading channels; SNR levels; adaptive modulation and coding; average packet error rate constrains; average spectral efficiency; bit error rate; cross-layered wireless networks; feedback delay; second-order statistics method; selective repeat-automatic repeat request; Adaptive systems; Bit error rate; Delay systems; Error analysis; Fading; Feedback; Modulation coding; System performance; Throughput; Wireless networks;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on
Conference_Location :
Wuhan
Print_ISBN :
1-4244-0517-3
DOI :
10.1109/WiCOM.2006.191
