Page 63 - IJEEE-2023-Vol19-ISSUE-1

Msayer, Swadi, & AlSabbagh | 59

TABLE I

VALUES OF PARAMETERS USED IN THE SIMULATION.

Simulation Factors

>C 1 DEF/GH

J5 0.04
J6 0.16
J7 0.8

Fig. 2: Average achievable rates vs transmit power without PH5 5R
cooperative relay. P56 5R
P57 10R
Fig. 3: Outage probability of near user NOMA without
cooperative relay. S4

Band Width 1TGH

Thermal noise density -174 P;R/GH

Fig 4: System model-1 of cooperative NOMA- Near User is where,
a Relay to the other two Users. PH5 : the distance between the ;< and the =5.
P56 : the distance between the =5 and the =6.
P57 : the distance between the =5 and the =7.
S : Path loss exponent.

Based on Eqs. (7), (8) and (9) to simulate the rates that
can be achieved with the transmitted power shown in Fig.
(5). It’s clear that the achievable data rate increases linearly
for both near and middle users due to using the SIC
technology to remove co-channel interference of larger
unwanted powers, resulting in higher signal-to-noise ratio
and high data rates that can be achieved with increased
transmitted power Pt. The results show that an improvement
in data rates for the second and third users, with a value
ranging from 7.57 bps/Hz to 12.55 bps/Hz for the second
user and a near-constant value of 1,292 bps/Hz for the third
user at the transmitting power ranging from zero to 30 dBm,
the first user’s achievable data rate is reduced by a half due
to the relying (a new value ranging from 6.56 bps/Hz to 11.55
bps/Hz).

The achievable rate of the near user is,
|>()|A**?+@))
>F599? = G log<(1 + (7)
<

Now, the near user (relay) will send the signals to both the

middle and far users through a special channel between the

relay and the middle user and another one between the relay

and the farthest user. |>),A|**?+@,)

>F699? = G log<(1 + (8) Fig. 5: Average achievable rates vs transmit power with
< (9) cooperative Un relay.
.>).>-).*-?.*+@?,+@3-A* )
>F799? = G log< (1 + Figure 6 illustrates variation of the outage probability to
< the transmitted power. It shows that, all users are safe from
the outage by contribution of the near user and using it as a
MATLAB is used to simulate the model. Table I shows relay to extend the coverage network to the other users.

the values of the simulation values that are used in the model.

values that are used in the model.