Title :
Experimental Investigation on Time Reversal Precoding for Space–Time Focusing in Wireless Communications
Author :
El-Sallabi, Hassan ; Kyritsi, Persefoni ; Paulraj, Arogyaswami ; Papanicolaou, George
Author_Institution :
Inf. Syst. Lab., Stanford Univ., Stanford, CA, USA
fDate :
6/1/2010 12:00:00 AM
Abstract :
This paper presents the results of indoor wideband measurements investigating the space-time properties of wireless signal transmission with online time-reversal (TR) precoding. The measurements were conducted using a new TR wideband multiple-input-multiple-output (MIMO) channel sounder operating at 2.45 GHz with a bandwidth of 240 MHz. Both line-of-sight (LOS) and non-line-of-sight (NLOS) propagation conditions were investigated. Spatial focusing and temporal compression can clearly be seen with TR precoding, which may be useful for future wireless system applications. Channel hardening due to TR is also observed under both LOS and NLOS conditions.
Keywords :
MIMO communication; indoor radio; precoding; wireless channels; TR wideband MIMO channel sounder; bandwidth 240 MHz; channel hardening; frequency 2.4 GHz; indoor wideband measurements; line-of-sight propagation condition; multiple-input-multiple-output channel sounder; nonline-of-sight propagation condition; online time reversal precoding; space-time focusing; temporal compression; wireless communications; wireless signal transmission; Channel; channel hardening; indoor; measurements; propagation; radio; spatial focusing; temporal compression; time reversal (TR); wideband;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2009.2024339
