Trellis Coded Hybrid Selective Repeat ARQ Schemes for Point-to-Multipoint Communication over Rayleigh Fading Channels

摘要

In this paper, the hybrid selective repeat (SR) automatic repeat request (ARQ) scheme using trellis coded modulation (TCM) proposed by Tellambura and Bhargava 21 is generalized to point-to-multipoint communications for Rayleigh fading channel. Analytical expressions are derived for the throughputs of the point-to-multipoint communication schemes with and without code combining technique. Numerical results show that the protocol using code combining technique yields better throughput than the protocol without code combining and the throughputs decrease when the number of receivers and the value of erasure threshold increase. When the number of receivers equals 1, the scheme without code combining becomes the point-to-point communication scheme proposed in 21.