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Advanced RF Front- End and Transceiver Systems Design Overview for Carrier Aggregation-Based 4G/5G Radios

October 2, 2017 @ 11:00 AM - 12:00 PM

Co-sponsored by: UC Riverside, Department of Electrical and Computer Engineering and IEEE Foothill MTT Section

Over the past few years, there has been an explosion in the mobile data usage mostly due to the
increasing number of tablets and smart phones in use. To support such demand, wider
transmission bandwidths are needed, and hence, the technique of Carrier Aggregation (CA) has
been introduced in 4G cellular systems. This enables scalable bandwidth expansion beyond the
single LTE carrier by aggregating two or more LTE component carriers of similar or different
baseband bandwidth, which can be chosen from the same 3GPP frequency band (intra-band) or
different 3GPP frequency bands (inter-band). Furthermore, CA is supported by both FDD and TDD
modes, and this offers the optimum flexibility in the way the spectrum is utilized and how the
network scheduling is configured. In order to push towards 5G data rates (>1Gbps), leveraging
more antennas and transmitting more bits per symbol to increase spectral efficiency requires the
use of MIMO and higher-order modulation techniques. This presentation focuses on discussing the
RF system architectural challenges for Advanced-LTE based user equipment (UE) radio, and the
resultant increased complexity in the radio due to the use of CA, MIMO, and higher order
modulation techniques; furthermore, concurrency and coexistence scenarios with other radio
access technologies (RAT) are considered in how they further add to the complexity of the RF frontend
and to its linearity requirements.

Speaker(s): Dr. Walid Al-Ahmad,

Room: 343
Bldg: WCH
UC Riverside, Department of Computer and Electrical Engineering
Riverside, California


October 2, 2017
11:00 AM - 12:00 PM