TY - GEN

T1 - Constant envelope precoding with adaptive receiver constellation in fading channel

AU - Zhang, Shuowen

AU - Zhang, Rui

AU - Lim, Teng Joon

PY - 2015

Y1 - 2015

N2 - Constant envelope (CE) precoding is an appealing transmission technique which enables the use of highly efficient nonlinear radio frequency (RF) power amplifiers (PAs). For CE precoding in a single-user multiple-input single-output (MISO) channel, a desired constellation is feasible at the receiver if and only if it can be scaled to lie in an annulus, whose boundaries are characterized by the instantaneous channel realization. Therefore, if a fixed receiver constellation is used for CE precoding in fading channel, where the annulus is time-varying, there is a non-zero probability of encountering a channel that makes CE precoding infeasible. To tackle this problem, we study the fixed-rate adaptive receiver constellation design for CE precoding to minimize symbol error rate (SER) in a single-user MISO flat-fading channel with an arbitrary number of antennas at the transmitter. Specifically, this paper proposes an efficient algorithm to find the optimal two-ring amplitude-and-phase shift keying (APSK) constellation that is both feasible and of the maximum minimum Euclidean distance (MED), for any given constellation size and instantaneous channel realization. Numerical results show that by using the optimized adaptive receiver constellation, our proposed scheme achieves significantly improved SER performance than CE precoding with fixed receiver constellation. Furthermore, with the PA efficiency gain achieved by CE precoding, our proposed scheme requires less transmitter power consumption to achieve a desired SER level than linear precoding schemes under the less-stringent average per-antenna power constraint (PAPC).

AB - Constant envelope (CE) precoding is an appealing transmission technique which enables the use of highly efficient nonlinear radio frequency (RF) power amplifiers (PAs). For CE precoding in a single-user multiple-input single-output (MISO) channel, a desired constellation is feasible at the receiver if and only if it can be scaled to lie in an annulus, whose boundaries are characterized by the instantaneous channel realization. Therefore, if a fixed receiver constellation is used for CE precoding in fading channel, where the annulus is time-varying, there is a non-zero probability of encountering a channel that makes CE precoding infeasible. To tackle this problem, we study the fixed-rate adaptive receiver constellation design for CE precoding to minimize symbol error rate (SER) in a single-user MISO flat-fading channel with an arbitrary number of antennas at the transmitter. Specifically, this paper proposes an efficient algorithm to find the optimal two-ring amplitude-and-phase shift keying (APSK) constellation that is both feasible and of the maximum minimum Euclidean distance (MED), for any given constellation size and instantaneous channel realization. Numerical results show that by using the optimized adaptive receiver constellation, our proposed scheme achieves significantly improved SER performance than CE precoding with fixed receiver constellation. Furthermore, with the PA efficiency gain achieved by CE precoding, our proposed scheme requires less transmitter power consumption to achieve a desired SER level than linear precoding schemes under the less-stringent average per-antenna power constraint (PAPC).

UR - http://www.scopus.com/inward/record.url?scp=84964870603&partnerID=8YFLogxK

U2 - 10.1109/GLOCOM.2014.7417419

DO - 10.1109/GLOCOM.2014.7417419

M3 - Conference article published in proceeding or book

AN - SCOPUS:84964870603

T3 - 2015 IEEE Global Communications Conference, GLOBECOM 2015

BT - 2015 IEEE Global Communications Conference, GLOBECOM 2015

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 58th IEEE Global Communications Conference, GLOBECOM 2015

Y2 - 6 December 2015 through 10 December 2015

ER -