New characterizations are given for orthogonal polynomials on the unit circle and the associated measures in terms of the reflection coefficients in the recurrence equation satisfied by the polynomials.

In this paper, a review of the methodology for the computation of transmission and reflection coefficients for the surface waves, propagated through a vertical contact, will be presented and discussed. The surface-wave transmission and reflection coefficients will be obtained using a simple method. This method will be very briefly described and compared with a more sophisticate method, obtainin...

The incorporation of intelligent reflecting surface (IRS) into wireless communication systems can extend the coverage and enhance data transmission rate. This paper studies joint transceiver IRS designs in IRS-assisted multi-input multi-output (MIMO) under both perfect channel state information (CSI) imperfect CSI. Specifically, transmit precoder, reflection coefficients at IRS, receive equaliz...