Performance of Viterbi Decoding With and Without ARQ on Rician Fading Channels

Abstract

In this paper, we investigate the performance of the Viterbi decoding algorithm with/without Automatic Repeat reQuest (ARQ) over a Rician flat fading channel with unlimited interleaving. We show that the decay rate of the average bit error probability with respect to the bit energy to noise ratio is at least equal to d f at high bit energy to noise ratio for both cases (with ARQ and without ARQ), where d f is the free distance of the convolutional code. The Yamamoto-Itoh flag helps to reduce the average bit error probability by a factor of 4 d f with a negligible retransmission rate. We also prove an interesting result that the average bit error probability decays exponentially fast with respect to the Rician factor for any fixed bit energy per noise ratio. In addition, the average bit error exponent with respect to the Rician factor is shown to be d f .

A Cross-Layered Theoretical Model of IEEE 1901 Power-Line Communication Networks Considering Retransmission Protocols

“…Currently, some valuable studies have paid attention to performance analysis of 1901 protocol for PLC networks [14][15][16][17][18][19][20][21][22]. However, all these works [14][15][16][17][18][19][20][21][22] do not consider the impact of physical layer's retransmission protocols [23][24][25][26][27][28][29][30] on 1901's MAC performance. Furthermore, how IEEE 1901 protocol affect the energy consumption in PLC networks, and whether 1901 protocol has bound performance are also neglected in the above works.…”

“…In practical network scenario, when the station occupies the PLC channel (through 1901's CSMA/CA mechanism) and attempts to transmit its packet, it begins to execute retransmission protocols 1 [23][24][25][26][27][28][29][30][41][42][43]. In the basic ARQ, for decoding, the receiver uses the packet received in the current attempt fragment only, and discards all the erroneously received copies of this packet.…”

“…RF denotes the Rayleigh fading, and N F the Nakagami-u fading 4. The relationship between channel gain and power gain has been verified in many existing literatures, e.g.,[23][24][25][26] 5. The detailed derivation process from f Ξ (ζ) to F Ξ (Ω) is shown in[46] 6.…”