Performance evaluation for cooperative ADF relaying V2I communications with burst transmission and PSA-CE schemes over quasi-static Rayleigh fading channels

In this paper, we propose the analytical approach for adaptive decode-and-forward (ADF) relaying vehicle-to-infrastructure (V2I) schemes consisting of N_D-symbol burst data transmission based on pilot symbol assisted-channel estimation (PSA-CE) methods over quasi-static Rayleigh fading channels. At first, we focus on the error-event at relaying on board equipments (OBEs) for N_D-symbol burst data transmission, whereas previous researches considered one data symbol transmission so that they showed the best performance bounds. By considering N_D-symbol burst for ADF relaying schemes, we derive an exact bit error rate (BER) expression which can be the performance of practical systems. Moreover, the practical channel estimation (CE) process is considered by pilot symbols transmission. Then, we investigate the effects of both a CE error and an estimated noise variance, which can be obtained by pilot symbol assisted (PSA)-CE methods, on the received signal-to-noise ratio (SNR) and BER. Furthermore, the average BER is derived in approximated closed-form expression for an arbitrary link SNR. The derived analytical approach is verified based on the number of relaying OBEs, pilots, and data symbols. Its accuracy is confirmed by comparison with simulation results.