  In this paper, we consider a MU-MISO system where users have highly accurate
Channel State Information (CSI), while the Base Station (BS) has partial CSI
consisting of an imperfect channel estimate and statistical knowledge of the
CSI error. With the objective of maximizing the Average Sum Rate (ASR) subject
to a power constraint, a special transmission scheme is considered where the BS
transmits a common symbol in a multicast fashion, in addition to the
conventional private symbols. This scheme is termed Joint Multicasting and
Broadcasting (JMB). The ASR problem is transformed into an augmented Average
Weighted Sum Mean Square Error (AWSMSE) problem which is solved using
Alternating Optimization (AO). The enhanced rate performance accompanied with
the incorporation of the multicast part is demonstrated through simulations.
