Open AccessPower distribution methods for MIMO‐OFDM systems and field experimentations
Author(s) -
Bocquet Wladimir,
Hayashi Kazunori,
Sakai Hideaki
Publication year - 2009
Publication title -
wireless communications and mobile computing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 64
eISSN - 1530-8677
pISSN - 1530-8669
DOI - 10.1002/wcm.746
Subject(s) - orthogonal frequency division multiplexing , computer science , mimo , power (physics) , bit error rate , transmitter power output , mimo ofdm , transmission (telecommunications) , spatial multiplexing , field (mathematics) , electronic engineering , telecommunications , mathematics , channel (broadcasting) , engineering , physics , transmitter , quantum mechanics , pure mathematics
In this paper, we propose several power allocation schemes for multi‐input multi‐output (MIMO) orthogonal frequency division multiplexing (OFDM) transmission based on the minimization of an approximated bit error rate (BER) expression, and we evaluate the different solutions via field trial experimentations. The methods illustrated in this paper, serve to allocate power among the different transmit antennas and the different subcarriers which compose the MIMO OFDM transmitted signal. Several solutions are available to perform power allocation. Frequency domain power allocation, spatial domain power allocation and combined spatial and frequency power allocation are evaluated. We first review and describe the analytical solution for each power allocation scheme and then evaluate the complexity in terms of both computational operations and BER performances. Simulation results show the performance in term of BER and link the advantage of each possibility of power distribution with the associated complexity. Copyright © 2009 John Wiley & Sons, Ltd.