Performance analysis of hybrid ARQ based on convolutional code

This paper proposes a FEC/ARQ integration in retransmission protocol which is an error control scheme investigation based on a convolutional code for data transmission. The integration is known as Hybrid Automatic Repeat reQuest (HARQ). The analysis of the throughput and bit-error rate (BER) performance, according to the different constraint lengths and code rate of convolutional codes on HARQ simulation scheme are presented. A capability of error correction is certainly provided in every (re)transmitted data, and from every transmission or retransmission, the information can be recovered alone if the error correction scheme still capable to correct. In our analysis, the maximum number of retransmissions in HARQ is limited to three. Then, we analyze the impact of average SNR on the throughput. The performance is compared between using HARQ scheme and previous result of FEC scheme only. The simulation is implemented in MATLAB application software environment.