Showing papers on "Legacy mode published in 2018"

Dynamic downlink power allocation for supporting higher order modulation

Abstract: A method and network entity for enabling higher order modulation (HOM) mode support for HOM capable wireless devices. The method includes determining a legacy mode power offset value for HOM mode capable wireless devices in legacy modulation mode and calculating a power headroom value for sending downlink data to the HOM mode capable wireless devices. When the power headroom value exceeds a threshold value, the HOM mode support for the HOM mode capable wireless devices is enabled using the identified legacy mode power offset value. When the power headroom value does not exceed the threshold value, and a HOM mode power offset value is available, the HOM mode power offset value being less than the legacy modulation mode power offset value, the HOM mode support for the HOM mode capable wireless devices is enabled using the HOM mode power offset value.

A Linearized Cascode Shut-off Low-Noise Amplifier for Carrier Aggregation Application

Abstract: In-band and out-of-band (OOB) interferences are major design problems in low-noise amplifiers (LNA) used for carrier aggregation (CA) application. This paper discusses the design of a cascode shut-off LNA configuration with high level of linearity using modified derivative superposition method. This configuration can work switchably between legacy and CA mode with minimal degradation in its linearity using load disconnection. The proposed architecture is designed using the RF library of TSMC 65-nm CMOS technology and is tested at Long-Term Evolution (LTE) band 2. The LNA achieved an 18. 6dBm input-referred third-order intercept point (IIP3), 13. 7dB S21 and 1.42 noise figure (NF) in CA mode. In legacy mode, it has attained an IIP3 value of 17. 4dBm, 13. 3dB S21, 1.47 noise figure (NF. It consumed 13mA of current at 2.5-V source in both CA and legacy modes.