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Therefore, the Lee path loss model has been selected for the path loss predictions, and to propose LRAF three time slots protocol for wireless cooperative network for the target environment (i.e.
Signal models for the LRAF three time slots TDMA based protocol
The channel conjugates used in the derived yD signal improve the performance of LRAF three time slots protocol, in term of low BER and high BER-Gain values.
The simulation model for the LRAF three time slots protocol is shown in Figure 2.
The performance analysis and evaluation of the proposed LRAF protocol has been accomplished with the comparison of PPAF two time slots protocol  and three time slots protocol .
The performance evaluation of LRAF protocol for shorter distances (i.e.
Moreover, the LRAF three time slots protocol showed further improvement over PPAF two time slots and three time slots protocols, in terms of low BER values, with the increase in SNR values from 21dB to 60dB, as shown in Figure 4.
The performance evaluation of LRAF protocol for longer distances (i.e.
It is also shown from results in Figures 5 and 6 that the proposed LRAF protocol indicated low BER values over PPAF two time slots and three time slots protocol, with the increase in SNR values from 21 dB to 60dB, as compared to the increase in SNR values from 0dB to 20dB.
Moreover, low BER values are indicated by LRAF protocol over PPAF two time slots protocol, in contrast to the BER values demonstrated from the assessment with the PPAF three time slots protocol.
The accuracy of LRAF three time slots protocol was evaluated statistically by using the GPED and LPED methods [35-36].
Where E0 is the average BER of the LRAF three time slot protocol and E1 is the average BER of PPAF two time slots or three time slots protocols and N is the total number of SNR values taken.
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