where the parameter Lmax denotes the maximum tolerable interference level.
In this example, we set the maximum tolerable interference level to Lmax=−40 dB relative to the unit transmit power.
The power curve of ABC tends to raise up with the increase of maximum tolerable interference power.
However, it is of paramount interest to estimate the maximum tolerable interference level in order to evaluate the correct behavior of the DAA algorithm.
The Relay can decode the signals successfully provided that the amount of interference inflicted at the relay input is below a predetermined threshold, which is the maximum tolerable interference level at the relay input.
Figure 6 Average total CRU bit rate,, versus maximum PU tolerable interference power,, with W, W, and. Figure 7 Average total CRU bit rate,, versus maximum PU tolerable interference power,, with W, W, and.
Denote H sp,n as the channel gain of subcarrier n from secondary user's transmitter to main user's receptor, and I max is the maximum tolerable average interference power.
The average total bit rate,, is plotted as a function of the maximum PU tolerable interference power,, with W and W, for and 0.7 in Figures 6 and 7, respectively.
As the PU has sufficient frequency spectrum resources to communicate with each other, the main purpose of them is seeking the maximum revenue under the tolerable interference, rather than improving the quality of communication.
Now, the maximum tolerable amount of additional inband interference IMAX, compared to the desired signal, the inband thermal noise and the inband quantization noise powers (S16-QAM + NTOT ), defines the needed interference rejection ratio demanded to fulfill the set SINRtarget.
This level is more or less the overall tolerable interference power at a receiver divided by the number of interferers in its vicinity.
