Title :
RF Spatial Modulation Using Antenna Arrays
Author :
Yijun Zhou ; Chia, Michael Yan-Wah ; Xianming Qing ; Yuan, Jiaxin
Author_Institution :
Inst. for Infocomm Res., A*Star, Singapore, Singapore
Abstract :
A new method of spatial linear modulation is presented for the RF signal modulation. The constant envelope and phase modulated signals are transmitted to an antenna array and then combined in space; the linear modulation is realized at the same time. The concentric antenna pairs are applied to eliminate the mismatch of phase delay among the modulated signals from different antenna pairs. The measurement results of an RF signal around 2.45 GHz modulated by a 3.84 Mbps QPSK signal are presented. The proposed spatial modulator is able to simplify RF transmitter design and achieve highly efficient power transmission.
Keywords :
UHF antennas; amplification; antenna phased arrays; modulators; quadrature phase shift keying; radio transmitters; QPSK signal; RF signal modulation; RF spatial modulation; RF transmitter design; antenna array; bit rate 3.84 Mbit/s; concentric antenna pair; constant envelope signal; highly efficient power transmission; phase delay mismatch; phase modulated signal; spatial linear modulation method; spatial modulator; Antenna arrays; Antenna measurements; Distortion; Phase modulation; RF signals; Antenna array; linear amplification with nonlinear components (LINC); modulation; outphasing; spatial power combining; wireless;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2272596
