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In this paper, the wideband digital predistortion (DPD) and the Zhu's general sampling theorem (ZGST) are applied to compensate the nonlinear characteristics of a wideband RF power amplifier with memory effects. In order to utilize the ZGST, the DPD test bench is carefully designed after analysis with the ZGST. The power amplifiers are excited by a long term evolution advanced signal with up to 100...
The design of a dual-channel broadband millimeter-wave receiver front-end for the next generation mobile communication is presented in this article. The front-end operates at 28GHz with 2GHz and 500MHz bandwidth in radio frequency (RF) and immediate frequency (IF) respectively. A scheme of single downconversion is used and a compact substrate integrated waveguide (SIW) bandpass filter is designed...
LTE-Advanced technology is required to support 100MHz channel bandwidth and transfer rates in excess of 1Gbps. The 2.6GHz band is one of the core band of LTE-Advanced technology. This paper provide the detailed design of the RF front-end. The receiver uses the traditional double-conversion superheterodyne structure, while transmitter uses a zero-IF structure, able to obtain high receiver sensitivity...
In this paper, the design of a high performance RF transceiver which supports wireless data-rate up to 1Gb/s is presented. The RF transceiver operates at 3.45GHz, the channel bandwidth is 100MHz. Excellent RF performance is obtained. The IMD3 is less than −40dBc when output power is 25dBm. Both TX and RX EVM are less than 3% when tested with a 20MHz TD-LTE signal. The transceiver has a 60dB dynamic...
This paper presents the design of an ultra low noise amplifier (LNA) from 6 GHz to 6.5 GHz, which is used in higher frequency band mobile communication systems. The circuit design, simulations and optimizations were performed using the Advanced Design System. The testing results indicate that the low noise amplifier has good performance: the gain is 24 dB with a 0.3 dB ripple, and the range of noise...
Implementation of a wideband RF receiver for the 6??6 MIMO (Multiple-Input Multiple-Output) TDD (Time Division Duplex) wireless communication system is reported in this paper. In order to achieve the best performance, a superheterodyne architecture with RF of 3.45GHz and IF of 1.15GHz is employed, and the signal bandwidth is 100MHz. System simulation results and design considerations are included...
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