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Connexin 43 (Cx43), a vital gap junction protein in tumor microenvironment (TME), is a novel molecular target for melanoma chemotherapeutics due to its tumor suppressive function. Dioscin, an herbal steroidal saponin, exerts anti‐tumor effects while the underlying mechanism is unclear. Using WB, FACS, and immunofluorescence methodologies, we found dioscin significantly activated the transcription...
This study examined the neural basis of framing effects using life-death decision problems framed either positively in terms of lives saved or negatively in terms of lives lost in large group and small group contexts. Using functional MRI we found differential brain activations to the verbal and social cues embedded in the choice problems. In large group contexts, framing effects were significant...
In order to meet the constantly increasing demand for ubiquitous, mobile access to the internet, next-generation mobile broadband communications systems based on OFDMA, such as IEEE 802.16 m, require a significant performance increase over previous generation systems, such as IEEE 802.16e-2005, particularly in cell-edge and average spectral efficiency. In this paper, we address the downlink adaptive...
In this paper, link adaptation, which dynamically selects modulation level and coding rate according to the channel condition, and several multi-input multi-output (MIMO) transmission modes are studied. As we know, the subchannels' signal-to-noise radio (SNR) by singular value decomposition (SVD) are unequal, which requires different modulation and coding schemes (MCS) to maximize the throughput....
In downlink multiple streams multiple-input multiple-output (MIMO) system, adaptive modulation and coding (AMC) is used to increase spectrum efficiency (SE) due to selecting the modulation and coding rate scheme (MCS) dynamically. However, there is a gap between UE's signal to interference plus noise ratio (SINR) and that required by the MCS. In this paper, we propose a novel power loading algorithm...
In this paper, we consider a multiuser relay network under amplify and forward (AF) scheme, where each mobile station (MS) is supported by a unique relay station (RS). While the RSs forwards the scaled signal to the MSs, the interference caused by the multiuser nature of the system propagates via the RSs, which significantly degrades the performance gain of the relay technique. We propose two beamforming...
The exceeding performance of Close-Loop MIMO scheme over Open-Loop one is attractive. However, the large size of Channel State Information (CSI) feedback to transmitter is its major drawback. To reduce this cost, many works have been done on CSI feedback design in frequency domain for MIMO-OFDM systems. We propose a scheme which represents the CSI in temporal domain. Based on that the channel is inherent...
The Vertical Bell Laboratories Layered Space-Time (V-BLAST) system can provide high capacity over rich scattering channel. The conventional minimum mean square error (MMSE) detection for V-BLAST is not suitable for time-varying channel due to high complexity. In the paper, we proposed an adaptive detection algorithm, which combines maximum likelihood (ML) channel estimator and least mean squares (LMS)...
In this paper, a novel detection method with self-interference reduction for double-ABBA (DABBA) quasi- orthogonal space-time code (QOSTC) is proposed, which utilizes low-dimension MMSE detection and symbols expectation (or symbols from MMSE detector) feedback in open-model. The symbols' expectations, which are derived from bit-wise soft-information (BWSI) from channel decoder, are used in self-interference...
In wireless broadcast (downlink) channels, multiple transmit antennas can provide tremendous throughput (i.e., multiplexing) gain, even if each accessed user has only one receive antenna. Recent work has shown that zero-forcing beamforming (ZF-BF) based on random vector quantization (RVQ) limited feedback is a simple and effective transmission technique for broadcast systems. This paper analyzes the...
In order to solve the problem of bad separation result of Anti-Hebbian algorithm, a weighted algorithm of blind signal based on the feed back neural network is discussed, i.e. the influence of source signal is overcame by the weighted process. And furthermore, the similarity algorithm is presented. The main process of the blind signal separation algorithm is to construct neural network by the characteristic...
In order to solve the problem of bad separation result of Anti-Hebbian algorithm, a weighted algorithm of blind signal based on the feed back neural network is discussed, i.e. the influence of source signal is overcame by the weighted process. And furthermore, the similarity algorithm is presented. The main process of the blind signal separation algorithm is to construct neural network by the characteristic...
We present Alamouti code assisted V-BLAST (ACAV), a new space-time architecture for fading multiple- input multiple-output (MIMO) channels. The transmission design is simple and flexible: two antennas are used to transmit signals the same as Alamouti code, while the other antennas are used to transmit signals similar to the popular V-BLAST. For maximum-likelihood decoding, the analysis shows that...
In this paper we propose several novel HARQ schemes for MIMO system which jointly utilize bit-wise soft- information (BWSI) chase combining. Retransmission mechanisms to obtain ARQ diversity are developed. We present the detection algorithm and how to jointly utilize the BWSI derived from former retransmission to improve BER performance. Finally we propose a new retrans scheme using channel codes...
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