Enhancement of Time Reversal Sub-wavelength Wireless Transmission Using   Pulse Shaping Technique (submit/1139227)
  A novel time-reversal subwavelength transmission technique, based on pulse shaping circuits (PSCs), is proposed. This technique removes the need for complex or electrically large electromagnetic structures by generating channel diversity via pulse shaping instead of angular spectrum transformation. It is shown that, compared to our previous time-reversal system based on chirped delay lines, the PSC approach offers greater flexibility and larger possible numbers of channels, i.e. ultimately higher transmission throughput. The PSC based time-reversal system is also demonstrated experimentally. 
Shuai Ding and Shulabh Gupta and Rui Zang and Lianfeng Zou and   Bing-Zhong Wang and Christophe Caloz
physics.optics