Qian Li

ORCID: 0000-0002-6016-1266
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Research Areas
  • Advanced Wireless Communication Techniques
  • PAPR reduction in OFDM
  • Cooperative Communication and Network Coding
  • Advanced Power Amplifier Design
  • Cognitive Radio Networks and Spectrum Sensing
  • Advanced Fiber Laser Technologies
  • Photonic Crystal and Fiber Optics
  • Optical Network Technologies
  • Wireless Communication Security Techniques
  • Wireless Communication Networks Research
  • Power Line Communications and Noise
  • Error Correcting Code Techniques

Beijing University of Posts and Telecommunications
2019-2024

State Key Laboratory of Information Photonics and Optical Communications
2024

Xidian University
2018

Nanyang Technological University
2010

A structure of faster‐than‐Nyquist (FTN) signaling combined with superposition coded modulation (SCM) is considered. The so‐called FTN‐SCM able to achieve the constrained capacity FTN and only requires a low detection complexity. By deriving new observation model suitable for FTN‐SCM, we offer power allocation based on proper method. Simulation results show that, at any given spectral efficiency, bit error rate (BER) curve lies clearly outside minimum signal‐to‐noise ratio (SNR) boundary...

10.1155/2018/4181626 article EN cc-by Wireless Communications and Mobile Computing 2018-01-01

As a class of capacity-approaching codes, nonbinary low-density parity-check (LDPC) codes have attracted much attention because noticeable performance. Nonbinary LDPC-coded modulation systems which excellent performance for high-spectral efficiency transmission are also potential schemes in the future communication system. In this paper, we propose new construction method quasi-cyclic LDPC codes. Furthermore, comparative study about various coded over AWGN channel and high-mobility is...

10.1109/access.2018.2869173 article EN cc-by-nc-nd IEEE Access 2018-01-01

In this paper, we consider a two-transmitter-two-receiver cognitive interference channel with causal bidirectional cooperation (CIFC-CBC), where the transmitters operate in full-duplex mode and cooperate each other way. Cooperation between is realized using strategy that combines both decode-and-forward (DF) compress-and-forward (CF) schemes. We derive an achievable rate region for considered system based on proposed coding scheme jointly implements splitting, block Markov coding,...

10.1109/tvt.2010.2040849 article EN IEEE Transactions on Vehicular Technology 2010-01-22

In this paper, an adaptive modulation and coding (AMC) scheme based on faster-than-Nyquist (FTN) signaling is considered, where FTN implemented with multi- layer superposition coded (SCM). Compared to the traditional AMC schemes, proposed adjusts number of layers K compression factor τ rather than code rates orders. Simulation results show that able achieve a wide range spectral efficiency. Furthermore, achievable efficiency approaches ultimate capacity shaping pulse, its performance can...

10.1109/wcsp.2018.8555911 article EN 2021 13th International Conference on Wireless Communications and Signal Processing (WCSP) 2018-10-01

In this paper, we propose a novel carrier phase recovery scheme based on Kalman Filter with Principal Component Analysis (KF-PCA) for coherent optical transmission system, which is low-complexity, Non-Data-Aided (NDA), feed-forward Carrier Phase Recovery (CPR) algorithm. The proposed algorithm enables synchronous demodulation of square Quadrature Amplitude Modulation (QAM) constellations, and it suitable practical hardware implementation block-wise parallel processing. employed to obtain an...

10.1117/12.3048518 article EN 2024-12-05
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