By William I. Orr, Stuart D. Cowan
This authoritative guide covers the layout, development, set up, and operation of fifty two vertical antennas.
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In this work, however, the transmit power was assumed to be fixed, so that the dynamics of the wireless fading channel was not fully exploited. Given the traffic dynamics and wireless channel uncertainties, the problem of characterizing the bound of MAC DL–PW trade-off is equivalent to minimizing the average energy consumption under all possible average delay constraints. Since the departure rates are closely related to the transmission schemes and the radio resources allocation strategies, solving the optimization problem implies finding the best power-rate allocation policy for the transmission for a given transmission scheme.
In addition, spectrum re-farming,1 cognitive  usage of white spectrum holes, provides enough freedom to dynamically adjust the BW according to the traffic requirement. Theoretical results  show that to obtain the optimal EE in the multi-user systems, BW and PW will be jointly optimized if the practical assumption is considered, which also triggers the practical resources allocation algorithm design in the licensed multi-band system and in unlicensed cognitive systems. • Multi-band systems: The practical evaluation of the multi-band system contains many technical challenges, for example, the modeling of circuit power consumption with respect to BW and the joint BW–PW resources scheduling policies.
Xu, “Impact of non-ideal efficiency on bits per joule performance of base station transmissions,” in Proc. of IEEE Vechicular Technology Conference (VTC), May 2011.  Y. Chen, S. Zhang, and S. Xu, “Characterizing energy efficiency and deployment efficiency relations for green architecture design,” in Proc. of IEEE International Communications Conference (ICC), Cape Town, South Africa, May 2010.  H. , “A cross-layer approach to energy efficiency for adaptive MIMO systems exploiting spare capacity,” IEEE Trans.