US 11,054,449 B2
Method and device for determining transmission power in multi-antenna communication system
Byung Moo Lee, Yongin-si (KR); Jong Ho Bang, Yongin-si (KR); Jin Hyeock Choi, Yongin-si (KR); and Byung Chang Kang, Yongin-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 14/385,409
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Mar. 13, 2013, PCT No. PCT/KR2013/002007
§ 371(c)(1), (2) Date Sep. 15, 2014,
PCT Pub. No. WO2013/137638, PCT Pub. Date Sep. 19, 2013.
Claims priority of application No. 10-2012-0025801 (KR), filed on Mar. 13, 2012.
Prior Publication US 2015/0070225 A1, Mar. 12, 2015
Int. Cl. G01R 21/133 (2006.01); H04W 52/42 (2009.01); G01R 29/08 (2006.01); H04B 7/0413 (2017.01)
CPC G01R 21/133 (2013.01) [G01R 29/08 (2013.01); H04W 52/42 (2013.01); H04B 7/0413 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of increasing an energy efficiency of a transmitter in a multiple input multiple output (MIMO) system, the method comprising:
calculating a power consumption of a transmitter;
calculating a channel capacity of the transmitter;
identifying to apply one precoding scheme from a plurality of precoding schemes;
in a case that a first precoding scheme is applied:
determining a first transmission power for increasing an energy efficiency of the transmitter using a first equation based on the calculated channel capacity and a total transmission power, wherein interference in the first equation is expressed as a constant, and
controlling a power amplifier of the transmitter based on a parameter being used to determine the first transmission power for increasing the energy efficiency of the transmitter and the first precoding scheme; and
in a case that a second precoding scheme is applied:
determining a second transmission power for increasing the energy efficiency of the transmitter using a second equation, different from the first equation, based on the calculated channel capacity and the total transmission power, wherein interference in the second equation is expressed as a function of the transmission power, and
controlling the power amplifier of the transmitter based on a parameter being used to determine the second transmission power for increasing the energy efficiency of the transmitter and the second precoding scheme,
wherein the total transmission power is determined based on a power consumption of the power amplifier and an efficiency of the power amplifier,
wherein the energy efficiency of the transmitter is a ratio between the calculated power consumption and the calculated channel capacity,
wherein the first transmission power for increasing the energy efficiency of the transmitter or the second transmission power for increasing the energy efficiency of the transmitter is determined as a value increasing the energy efficiency of the transmitter based on a relationship between the total transmission power and the energy efficiency of the transmitter.