A5102998454- Advanced Wireless Communication Techniques
- PAPR reduction in OFDM
- Wireless Communication Networks Research
- Power Line Communications and Noise
- Advanced Aircraft Design and Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Advanced MIMO Systems Optimization
- Advanced Power Amplifier Design
- Turbomachinery Performance and Optimization
- Heat transfer and supercritical fluids
- Radiative Heat Transfer Studies
- Advanced Wireless Communication Technologies
- Refrigeration and Air Conditioning Technologies
Xi'an Jiaotong University
2016-2022
Non-orthogonal multiple access (NOMA) has been recognized as a potential technique to achieve higher spectral efficiency (SE) for future 5G systems. However, the anticipated thousand-fold increase in wireless data traffic urgently calls new designs of power-efficient communication In this paper, we investigate NOMA from perspective energy (EE) multiuser downlink system. Firstly, generalize an existing cognitive radio (CR) inspired scheme by introducing antenna techniques and extending number...
Estimation of carrier frequency offset (CFO) is a crucial task for orthogonal frequency-division multiplexing (OFDM) systems, and it should be performed with affordable computational complexity practicality. This paper proposes two blind fast CFO estimators OFDM systems based on null subcarriers. Compared the existing subcarriers estimators, significantly reduced by avoiding an exhaustive grid searching or high-order polynomial rooting procedure. The mean squared error (MSE) performance...
In this paper, we propose blind methods to jointly estimate carrier frequency offset and in-phase/quadrature-phase imbalance for orthogonal frequency-division multiplexing (OFDM) systems exploiting constant modulus subcarriers. The proposed algorithms support fully loaded transmissions, which enhance the spectral efficiency. Other advantages of include: 1) they work well with only one received OFDM block thus belong category one-shot estimation methods; 2) are computationally efficient; 3)...
The presence of carrier frequency offset (CFO) and in-phase/quadrature-phase (I/Q) imbalance results in inter-carrier interference thus greatly degrades the performance orthogonal division multiplexing (OFDM) systems. In this paper, we propose a new blind synchronization scheme for OFDM systems with frequency-independent I/Q imbalance. A joint estimator CFO parameter is first proposed by exploiting multi-antenna redundancy at receiver. Estimation computational complexity reduced expressing...
In this paper, we propose a new blind frequency synchronization scheme for an OFDM system with I/Q imbalance. A estimation of joint CFO and imbalance parameters is first developed by exploiting the multi-antenna redundancy at receiver. The computational complexity reduced expressing cost function as superposition very few harmonically related cosine waves. compensation can be further carried out, which would result in equivalent received signal model without distortion. Then conventional...