Throughput Study of Cooperative Diversity System Based on Truncated ARQ Protocol ( Department of Electronics and Communication Engineering,Sun Yat-sen University,Guangzhou,Guangdong 510275,China; Key Laboratory of Digital Life,Ministry of Education,Guangzhou,Guangdong 510275,China)
ZHANG Guang-chi, TANG Dong, LI Guang-ping, et al. Throughput Study of Cooperative Diversity System Based on Truncated ARQ Protocol ( Department of Electronics and Communication Engineering,Sun Yat-sen University,Guangzhou,Guangdong 510275,China; Key Laboratory of Digital Life,Ministry of Education,Guangzhou,Guangdong 510275,China)[J]. Acta Electronica Sinica, 2007, 35(8): 1603-1607.
ZHANG Guang-chi, TANG Dong, LI Guang-ping, et al. Throughput Study of Cooperative Diversity System Based on Truncated ARQ Protocol ( Department of Electronics and Communication Engineering,Sun Yat-sen University,Guangzhou,Guangdong 510275,China; Key Laboratory of Digital Life,Ministry of Education,Guangzhou,Guangdong 510275,China)[J]. Acta Electronica Sinica, 2007, 35(8): 1603-1607.DOI:
the throughput of a cooperative diversity communication system based on truncated ARQ protocol is studied.The theoretical throughput expressions of cooperative diversity and two-hop systems are derived.According to the expressions
throughput is affected by the MAC layer parameter data packet length
L
and physical layer parameter modulation level
b
so cross-layer design can be used for throughput optimization.By assuming that
L
and
b
are continuous variables
the maximum throughput is evaluated by two-dimension (2-D) continuous optimization algorithms.Then a 2-D discrete optimization algorithm is proposed to find the maximum throughput
which is practi
cal for applications.Furthermore
with the knowledge of signal-to-noise ratio (SNR) information
the 2-D algorithm is simplified into a 1-D algorithm.The 1-D discrete algorithm has only a little performance loss compared with the 2-D algorithm.