TY - GEN

T1 - Optimal flashy transmission in training-based MISO TDD systems

AU - Zhou, Xiangyun

AU - Sadeghi, Parastoo

AU - Lamahewa, Tharaka A.

AU - Hjørungnes, Are

PY - 2011

Y1 - 2011

N2 - We consider a flashy transmission scheme in multiple-input single-output (MISO) systems. In order to efficiently utilize the limited energy budget, only a portion of the available time is used for the actual transmission. For block-wise transmissions, we define the flashiness as the percentage of blocks used for the actual transmission. Each transmission block consists of a reverse training phase and a data transmission phase. Using a capacity lower bound as the figure of merit, we show that the optimal training and data transmit power does not change with the energy budget as long as the flashiness is strictly less than one. We provide a simple design guideline to obtain closed-form solutions for the optimal flashiness, training power, as well as data transmit power which maximize the capacity lower bound. Our numerical results demonstrate a significant rate improvement by using the optimal flashy transmission in the low signal-to-noise ratio (SNR) regime, compared to the non-flashy scheme which uses all blocks for transmission.

AB - We consider a flashy transmission scheme in multiple-input single-output (MISO) systems. In order to efficiently utilize the limited energy budget, only a portion of the available time is used for the actual transmission. For block-wise transmissions, we define the flashiness as the percentage of blocks used for the actual transmission. Each transmission block consists of a reverse training phase and a data transmission phase. Using a capacity lower bound as the figure of merit, we show that the optimal training and data transmit power does not change with the energy budget as long as the flashiness is strictly less than one. We provide a simple design guideline to obtain closed-form solutions for the optimal flashiness, training power, as well as data transmit power which maximize the capacity lower bound. Our numerical results demonstrate a significant rate improvement by using the optimal flashy transmission in the low signal-to-noise ratio (SNR) regime, compared to the non-flashy scheme which uses all blocks for transmission.

UR - http://www.scopus.com/inward/record.url?scp=79953150565&partnerID=8YFLogxK

U2 - 10.1109/AUSCTW.2011.5728732

DO - 10.1109/AUSCTW.2011.5728732

M3 - Conference contribution

SN - 9781424497157

T3 - Proceedings of the 2011 Australian Communications Theory Workshop, AusCTW 2011

SP - 25

EP - 30

BT - Proceedings of the 2011 Australian Communications Theory Workshop, AusCTW 2011

T2 - 12th Annual Australian Communications Theory Workshop, AusCTW 2011

Y2 - 31 January 2011 through 3 February 2011

ER -