• Publications
  • Influence
Soft Combination and Detection for Cooperative Spectrum Sensing in Cognitive Radio Networks
TLDR
It is shown in this paper that an SNR wall reduction can be achieved by employing cooperation among independent cognitive radio users and a new softened hard combination scheme with two-bit overhead for each user is proposed to achieve a good tradeoff between detection performance and complexity.
An Overview of Massive MIMO: Benefits and Challenges
TLDR
This paper addresses the potential impact of pilot contamination caused by the use of non-orthogonal pilot sequences by users in adjacent cells, and analyzes the energy efficiency and degrees of freedom provided by massive MIMO systems to enable efficient single-carrier transmission.
OFDM and Its Wireless Applications: A Survey
TLDR
This paper addresses basic OFDM and related modulations, as well as techniques to improve the performance of OFDM for wireless communications, including channel estimation and signal detection, time- and frequency-offset estimation and correction, peak-to-average power ratio reduction, and multiple-input-multiple-output (MIMO) techniques.
Broadband MIMO-OFDM wireless communications
TLDR
The paper explores various physical layer research challenges in MIMO-OFDM system design, including physical channel measurements and modeling, analog beam forming techniques using adaptive antenna arrays, and signal processing algorithms used to perform time and frequency synchronization, channel estimation, and channel tracking in M IMO- OFDM systems.
Device-to-Device Communications Underlaying Cellular Networks
TLDR
Numerical results show that the proposed scheme can significantly improve the performance of the hybrid system in terms of D2D access rate and the overall network throughput.
Simplified channel estimation for OFDM systems with multiple transmit antennas
TLDR
Two techniques to improve the performance and reduce the complexity of channel parameter estimation are presented: optimum training-sequence design and simplified channel estimation.
Fundamental trade-offs on green wireless networks
TLDR
This article proposes a framework for green radio research and integrates the fundamental issues that are currently scattered and demonstrates that key network performance/cost indicators are all strung together.
Energy-efficient link adaptation in frequency-selective channels
TLDR
This paper considers the special case of flat-fading channels to develop an upper bound on energy efficiency and to characterize its variation with bandwidth, channel gain and circuit power, and demonstrates the fundamental tradeoff between energy-efficient and spectrum-efficient transmission.
Power of Deep Learning for Channel Estimation and Signal Detection in OFDM Systems
TLDR
The proposed deep learning-based approach to handle wireless OFDM channels in an end-to-end manner is more robust than conventional methods when fewer training pilots are used, the cyclic prefix is omitted, and nonlinear clipping noise exists.
Robust channel estimation for OFDM systems with rapid dispersive fading channels
TLDR
A minimum mean-square-error (MMSE) channel estimator is derived, which makes full use of the time- and frequency-domain correlations of the frequency response of time-varying dispersive fading channels and can significantly improve the performance of OFDM systems in a rapid dispersion fading channel.
...
1
2
3
4
5
...