CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Minimum Energy to Send k Bits Over Multiple-Antenna Fading Channels

W. Yang ; Giuseppe Durisi (Institutionen för signaler och system, Kommunikationssystem) ; Y. Polyanskiy
Ieee Transactions on Information Theory (0018-9448). Vol. 62 (2016), 12, p. 6831-6853.
[Artikel, refereegranskad vetenskaplig]

This paper investigates the minimum energy required to transmit k information bits with a given reliability over a multiple-antenna Rayleigh block-fading channel, with and without channel state information (CSI) at the receiver. No feedback is assumed. It is well known that the ratio between the minimum energy per bit and the noise level converges to 1.59 dB as k goes to infinity, regardless of whether CSI is available at the receiver or not. This paper shows that the lack of CSI at the receiver causes a slowdown in the speed of convergence to 1.59 dB as k -> infinity compared with the case of perfect receiver CSI. Specifically, we show that, in the no-CSI case, the gap to 1/root k dB is proportional to ((log k)/ k)(1/3), whereas when perfect CSI is available at the receiver, this gap is proportional to lksa. In both cases, the gap to -1.59 dB is independent of the number of transmit antennas and of the channel's coherence time. Numerically, we observe that, when the receiver is equipped with a single antenna, to achieve an energy per bit of 1.5 dB in the no-CSI case, one needs to transmit at least 7 x 10(7) information bits, whereas 6 x 10(4) bits suffice for the case of perfect CSI at the receiver.

Nyckelord: Channel coding, energy efficiency, minimum energy per bit, multiple-antenna fading channels, finite blocklength, coding rate, capacity, regime, Computer Science, Engineering, ekopa a, 1973, acta scientiarum mathematicarum, v34, p334



Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2017-02-15. Senast ändrad 2017-05-11.
CPL Pubid: 248152

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem (1900-2017)

Ämnesområden

Informations- och kommunikationsteknik
Elektroteknik och elektronik

Chalmers infrastruktur