A 60 GHz Wideband, Low-Power Active Receiving Antenna With Adjustable Polarization for SNR Improvement

Capacity improvement through selection diversity for dual‐polarized antenna systems

“…By comparison, according to the simulation results, the average PRA of the selected MT decreases to 0.2582 (approximately 14.7937°) when the diversity order is 8. For the same diversity order, the mean PRA of the selected MT with the minimum PRA is 0.1745 (approximately 10.0050°), which is better PRA alignment performance than that of the PRA‐adjustable DPA 13 …”

“…Unlike the capacity analyses for DPA systems, there have been other studies to directly reduce the PRA mismatch or improve the capacity degradation caused by the PRA mismatch. A PRA‐adjustable DPA has been developed 13,14 . If the PRA mismatch can be measured at an MT, it may be possible to achieve the PRA alignment by adjusting the PRA of either the transmitter or the receiver DPA.…”

“…There is an another problem that only MTs equipped with the DPA can get the benefit of the PRA mismatch reduction. And the PRA mismatch reduction performance is limited by the adjustable step size of the DPA (e.g., 22.5°) 13 . The introduction of the SIC always leads to an increase in the computational complexity of the receiver 15 .…”

“…They both showed that the capacity could be improved by reducing the PRA mismatch through the MT selection process. Unlike other solutions, 13,15 the selection diversity can not only be easily implemented in a DPA system but can also effectively solve the PRA mismatch problem. Nevertheless, further study seems to be needed because the capacity evaluation was conducted only for MTs with a single‐polarization antenna 17 and quantitative analysis of the experimental results was not presented 18 …”

“…The scheduling algorithm only requires generally used feedback information. Therefore, there is no need to worry about the cost or computational complexity as when introducing the new DPA hardware 13 or SIC to the DPA system 15…”