In this paper, we consider M-ary phase shifting keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) data symbol burst transmission for adaptive decode-andforward (ADF) relay systems over quasi-static Rayleigh fading channels. A burst has pilot symbols and data symbols. From pilot symbols, we can estimate the channel gain and detect each relay node’s transmission mode for ADF schemes. At first, we focus on the derivation of the received signal to noise ratio’s (SNR’s) probability density function (PDF) for ADF relay systems, in which error events at relay nodes and channel estimation errors are considered. Then, we derived the averaged channel capacity as an approximated closed-form for an arbitrary link signal-to-noise ratio (SNR) for different modulation orders. We verified its accuracy by comparison with simulation results.

In this paper, we propose the analytical approach for adaptive decode-and-forward (ADF) relaying vehicle-to-infrastructure (V2I) schemes consisting of ND-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 ND-symbol burst data transmission, whereas previous researches considered one data symbol transmission so that they showed the best performance bounds. By considering ND-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.

In this paper, we derive the average symbol error rate (SER) for the N-D-symbol burst hybrid adaptive decode-or-amplify-forward (HADF) relaying vehicle-to-infrastructure (V2I) communication systems over quasi-static independent and non-identical distributed (INID) Rayleigh fading channels. Our proposed analytical approach includes channel estimation (CE) errors generated by practical pilot symbol assisted-CE (PSA-CE) schemes. Firstly, based on the error-events at relaying on board equipments (OBEs) for N-D-symbol burst data transmission, the conditional SER expression has been derived as an exact form. Then, the approximated average SER (ASER) expressions are presented as the closed-forms and their accuracy is confirmed by the comparison with simulation results. Therefore, we can conclude that our analytical expressions are tractable forms, and can be used as a tool to verify effects of an erroneous detection and hybrid transmission at each relaying OBE on the combined signal-to-noise ratio (SNR) and ASER for cooperative HADF relaying communication systems.

In this paper, we propose the average outage probability expressions for adaptive decode-and-forward (ADF) relaying schemes based on burst transmission over quasi-static Rayleigh fading channels. The derived analytical approach is verified based on the number of relays and data symbols. Its accuracy is confirmed by comparison with simulation results.

This paper provides a framework for evaluating the error rate performance of decode and forward (DF) relay cooperative transmission in the presence of channel estimation (CE) error caused by pilot symbol assisted-channel estimation (PSA-CE) schemes over Rayleigh fading channels.Average bit error rate (BER) and average symbol error rate (SER) are expressed as the well-known closed-forms by using error-events at relay nodes and moment generating function (MGF) of the received signal-to-noise ratio (SNR), which quantifies the SNR penalty arising from CE errors.Moreover, the effects of erroneous detection and transmission at relay nodes are verified in terms of both the combined SNR and the average error rate, and cooperative diversity is observed from closed-form error rate expressions.Simulation results are finally presented to validate derived analytical performance ma-trices.

This paper provides a framework for evaluating the error rate performance of decode and forward (DF) relay cooperative transmission in the presence of channel estimation error (CHE) caused by pilot symbol assisted- channel estimation (PSA-CE) schemes. Simulation results are finally presented to validate derived ABER and ASER expressions.

In this paper, we propose the analytical approach for amplify-and-forward (AF) relay cooperative transmission in the presence of channel estimation error (CEE) generated by pilot symbol assisted-channel estimation (PSA-CE) schemes over quasi-static Rayleigh fading channels.Average symbol error rate (SER) is expressed as the well-known closed-form by using moment generating function (MGF) of the received signal-to-noise ratio (SNR), which quantifies the SNR penalty arising from CEE.Moreover, the effect of CEE on SER performance is verified based on the number of pilot symbols and the accuracy of the derived average SER expression of M-ary phase shift keying (MPSK) is confirmed by comparison with simulation results.

In this paper, we propose the analytical approach for amplify-and- forward (AF) relay networks with pilot symbol assisted-channel estimation (PAS-CE) over quasi-static Rayleigh fading channels. Moreover, the accuracy of the channel estimation process is verified based on the number of pilot symbols and the accuracy of the derived average symbol error rate (ASER) expression of M-ary phase shift keying (MPSK) is confirmed by comparison with simulation results.