Xiangning Fan, Song Yulin
This paper studies LEACH protocol, and puts forward energy-LEACH and multihop-LEACH protocols. Energy-LEACH protocol improves the choice method of the cluster head, makes some nodes which have more residual energy as cluster heads in next round. Multihop-LEACH protocol improves communication mode fr...
Xiangning Fan, Si Chen, Xiaodong Zhang
Interference coordination is one of the effective methods to mitigate Inter-Cell Interference (ICI) in OFDM system. An ICI coordination technique based on users' ratio and frequency allocation is proposed in this paper. Firstly, it is guaranteed that cell-edge users in neighbor cells are not interfe...
Xiangning Chen, Cuie Sun, Qi Chen, F. Anthony O’Neill et al.
BACKGROUND: Apoptosis has been speculated to be involved in schizophrenia. In a previously study, we reported the association of the MEGF10 gene with the disease. In this study, we followed the apoptotic engulfment pathway involving the MEGF10, GULP1, ABCA1 and ABCA7 genes and tested their associati...
Xiangning Fan, Bing Feng, Guangguo Bi
Channel estimation is very important for OFDM based UWB system because of its coherent demodulation. In this paper, a new improved channel estimation method is proposed based on the characteristics of the UWB channels. Compare with the estimator using discrete Fourier-transform, the proposed algorit...
Tianao Ding, Xiangning Fan, Dixian Zhao
This Letter reports a 25.80–30.84 GHz wideband millimetre‐wave VCO in 65‐nm CMOS technology. A 4‐bit binary‐weighted capacitor bank is used to extend the tuning range. The PMOS current source, as well as the LC noise filtering network, are used to improve the phase‐noise performance. Occupying a cor...
Can Zhu, Xiangning Fan
This study analyses the bit transition and integration over multiple code periods in weak global navigation satellite system signal acquisition. Bit transition must be considered in weak signal environments as it causes a correlation peak splitting reducing the correlation gain. In this study, a mod...
Kuan Bao, Xiangning Fan, Li Tang, Zaijun Hua et al.
This paper presents a reconfigurable current-commutating passive mixer for multi-standard applications. By having controllable transconductance and transimpedance stages, the gain, noise figure and linearity of the mixer can be reconfigured. Fabricated in 0.18 μm CMOS process, the mixer achieves a v...
Xiangning Fan, Yuanjie Li, Mingqi Li, Xiaodong Zhang
Single-carrier FDMA (SC-FDMA) is a new kind of FDMA system which was proposed in recent years. It has the same PAPR as single-carrier system and its resource scheduling is as flexible as multi-carrier system. For comparison, the 3GPP LTE uplink scheme DFT-S-OFDM, and our new scheme DFT-S-GMC which i...
Jian Tao, Xiangning Fan, Xin Chen
A SAW-less receiver front-end with an active adjustable feedback loop for blocker-filtering is presented. By simply tuning the gain of loop amplifier, the −3 dB intermediate frequency (IF) bandwidth can be configured from 1 to 15 MHz continuously only using 46 pF capacitors. Moreover, the blocker cu...
Fan Xiangning, Dengkui Zhu
WiMAX system is based on OFDMA, and it is very suitable for VoIP traffic. At the same time, Frame bundling is an technique to improve the performance of VoIP, and so it is applied to WiMAX system in this paper. The simulation results indicate that when the system is inadequate of bandwidth, this tec...
Kai Sun, Yupeng Fu, Yì Wáng, Li Lü et al.
The growth in 5G mm-Wave communications draws tremendous demands on the high-quality signal sources. To satisfy the requirements for a wide tuning range and low phase noise, PLL cascaded with a frequency multiplier is typically applied in mm-Wave systems. In this letter, a 9-13 GHz integer-N charge-...
Xiangning Fan, Linhui Bao
One crucial problem of satellite navigation is the reduced accuracy for location inside buildings and urban canyons. A hybrid positioning algorithm for satellite navigation and cellular radio networks can resolve the problem. This paper studies and compares satellite-based positioning algorithms and...
Xiangning Fan, Chu Jintao
Multi-user orthogonal frequency division multiplexing (OFDM) with adaptive sub-carrier and bit allocation are considered in this paper. Assuming having the knowledge of the instantaneous users' channel gains, three typical dynamic sub-carrier and bit allocation algorithms are analyzed and compared. ...
Xiangning Fan, Hui Zhao, Xiaodong Zhang
According to the channel's fading characteristics, power control, adaptive modulation and coding (AMC), and auto request retransmission (ARQ) techniques for link adaptive are systematically studied for OFDM-based wireless systems in this paper. Furthermore, simulations and analyses are performed by ...
Xiangning Fan
After introducing the frame of the whole wireless network system and analyzing the common design method of embedded system,this paper presents a novel wireless private network based on Linux embedded system.The design and implementation of the network system is expatiated.Hardware design according t...