At the beginning (t = 0), the target mobile node transmits training sequence at its highest transmit power and seeks for assistance from all reachable peer nodes.
Here, 1 j max denotes a vector with a 1 if the corresponding base station has the highest transmit power and zeros otherwise.
In order to check this scenario, it is assumed that small-cell BS operates in the location allowing for highest transmit power, i.e., 37.8 dBm.
The PA transmit power setting of −4 dB addresses the highest transmit power possible and equals approximately a total transmit power of 23 dBm at a bandwidth of 30 PRBs.
The transmit power itself (P k ) is determined by the MIMO stream that requires the highest transmit power (proportional to the effective interference and target SINR ( γ k tgt )).
An important aspect to point out is that the transformation matrix (widetilde {mathbf {W}}) is calculated only once with the highest transmit power, after which it can be used with all transmit powers to reduce the number of basis functions.
If we require resource fairness, nevertheless, that is, should be the same for all users, then every user can only get as many PRBs as the worst user (using the highest transmit power).
Namely, since the strengths of the nonlinearities are directly proportional to the transmit power, the SI terms that are negligibly weak with the highest transmit power are at least as weak with the lower transmit powers, which means that the same SI terms can be omitted also then.
Because of this high-altitude orbit, Earth-based communication transceivers require high transmitting power, large communication antennas, or both in order to communicate with the satellite.
Therefore, with the fixed DAC output dynamic range, the PN-PAM-based transmission systems can achieve higher transmitting power and obtain better performance.
