J4 ›› 2012, Vol. 39 ›› Issue (5): 85-90.doi: 10.3969/j.issn.1001-2400.2012.05.015

• Original Articles • Previous Articles     Next Articles

Realization of PSK using a microwave phase shifter

CHEN Jie1;HUANG Youhuo1;BAI Xiaoping2;LIU Weixing1   

  1. (1. Science and Technology on Antenna and Microwave Lab., Xidian Univ., Xi'an  710071, China;
    2. School of Mechano-electronic Engineering, Xidian Univ., Xi'an  710071, China)
  • Received:2011-06-30 Online:2012-10-20 Published:2012-12-13
  • Contact: CHEN Jie E-mail:mike55555555@sina.com

Abstract:

The new realization of PSK using a digital microwave phase system is presented. A microwave phase shifter controlled by FPGA is used to shift the phase of the radio carrier wave to finish PSK modulation. The new design can realize 2, 4, 8, 16, 32 or 64 PSK modulations. When the new design is used in an antenna array system, only one phase shifter is needed to finish both PSK modulation and beam-forming. Tests of the wireless transmitter that is fabricated according to the new design show that the phase shifting error is lower than 1.2° and the BER is lower than 10-5, which leads to the BER level of the common PSK realization of orthogonal modulation. The new design does not need an orthogonal modulator and a mixer which are necessary in the common PSK realization of orthogonal modulation, thus simplifying the system and reducing its cost.

Key words: microwave phase shifter, antenna array, beam-forming, PSK, FPGA