Xiaonan Nicole Shi

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This paper focuses on the study of low density parity check (LDPC) coded multiple-input multiple-output (MIMO) systems for high throughput wireless communication. The evaluation and implementation of quasi-cyclic LDPC (QC- LDPC) code in MIMO-OFDM systems are presented. QC-LDPC has comparative error correcting performance with random LDPC and considerably(More)
For multiple-input multiple-output (MIMO) wireless communications systems, we propose a new zero-forcing (ZF) detection approach that explicitly accounts for instantaneous channel state information (ICSI) estimation error and spatial correlation. For this ZF approach we derive an average error probability (AEP) expression for transmit-correlated Rician(More)
This paper studies zero-forcing (ZF) detection for multiple-input multiple-output (MIMO) wireless communications systems and transmit-correlated and estimated Rician fading with realistic azimuth spread (AS) and A"-factor. Due to the nonzero-mean channel gain matrix, the matrix that determines the symbol-detection signal-to-noise ratio for the(More)
In this paper, the evaluation and the implementation of quasi-cyclic LDPC (QC-LDPC) codes in MIMO-OFDM systems are presented. QC-LDPC has comparative error correcting performance with random irregular LDPC and considerably reduces complexity. We evaluate communication performance of the QC-LDPC coded system based on the IEEE802.11n standard in a 4 times 4(More)
The multiple-input multiple-output (MIMO) technique can greatly improve coverage and throughput in wireless networks. However, varying channel parameters create unfavorable conditions that make the transmission less reliable. Unfortunately, many previous MIMO evaluations suffer from limited practical relevance due overlysimplified assumption about the(More)
In recent years, there have been significant breakthroughs in wireless communication systems design based on the multiple-input multiple-output (MIMO) concept. Exploiting the channel state information at the transmitter (CSIT) can improve the link performance. Thus, MIMO precoding has been an active research area for wireless communications. By specifying a(More)
Objective: To analyze the normal value of the iodine content in the left ventricular myocardium of healthy subjects and to observe if there is a segmental differences on iodine distribution by using the second generation dual-source dual-energy computed tomography myocardial first perfusion imaging. Methods: In this retrospective study, 42 healthy subjects,(More)
For multiple-input/multiple-output (MIMO)-based wireless communications systems with precoding, we evaluate the symbol-detection performance for Rician fading. We first consider, as in conventional evaluation approaches, fixed channel statistics, i.e., typical settings for the azimuth spread (AS), Rician K-factor, and deterministic channel matrix component(More)
Adopting orthogonal frequency division multiplexing (OFDM) to low-density parity check (LDPC) coded Multipleinput multiple-output (MIMO) is attractive scheme for wireless communication systems. An iterative receiver design for LDPC coded MIMO-OFDM system is proposed as the foundation for enhancing the wireless link performance can deliver the coverage,(More)