Research Article
A Spectrum Efficient Secure Transmission Scheme Based on Directional Polarization Modulation for Wireless Communication Systems
Figure 4
-th order PM constellation structure [16].
(a) 2PM |
(b) 4PM |
(c) 8PM |
(d) 16PM |
(a) 2PM |
(b) 4PM |
(c) 8PM |
(d) 16PM |