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To achieve an optimal trade-off between video quality and energy efficiency in the uplink streaming of multi-user Scalable Video Coding (SVC) videos in relay-based Orthogonal Frequency Division Multiple Access (OFDMA) cellular networks, a cross-layer design framework that jointly selects the Transmission Policy (TP) for SVC video frames, assigns OFDMA subcarriers, and allocates power for each subcarrier...
Spatial Modulation (SM) is a newly introduced wireless transmission scheme, and Space Shift Keying (SSK) is its simplified version. Their capacity performance has not been well examined to date. Starting from basic definitions of information theory, through theoretical analyses and numerical calculations, this paper evaluates the capacity of SM systems in various channels. Our conclusion is that under...
This paper is on the multi-view stereo video display system on mobile phone. The key point is that the existing eight viewpoints display technology on optical-plate stereo mobile phone has an obvious but not very clear stereoscopic effect. Firstly, this paper does some research on parallax principle parallax corrector method and the viewpoints matching principle based on the multi-view image composition...
This article started with the basic principle of stereoscopic technology, developed a demonstration platform for the stereoscopic system. The focal plane and disparity were detailedly analysed ,which had a great impact on the stereoscopic effect in this system.The article proposed a calculation method matching with the displaying equipment, and finally invented a stereoscopic player, which could achieve...
Aiming at the fault signal detection in mechanism system, all phase fast Fourier transform (APFFT) method is proposed for fault detection. The method of APFFT has the outstanding characteristics: the very few power leaks, the zero phase error and the fewer side lobes. So it can resist noise and increase the validity of diagnosis results. Finally, the case of bearing diagnosis is given by using the...
The bit error rate (BER) of MDPSK-OFDM in frequency domain over fading HF channels is evaluated, and the optimum value of subcarrier number is given and the upper and lower bound of BER is obtained. The convention differential demodulation scheme is sensitive to the value of subcarrier number in time-variant multipath channel. Improved frequency domain differential demodulation (FDDD) scheme for fast...
In this paper, we investigate the capacity of multi-carrier modulation (MCM) system based on multiple input multiple output (MIMO) antennae for single user communications over the additive noise channel. We define a two variable energy spectrum function for each antenna which describes energy distribution in time-frequency-space (T-F-S) subchannels. The general wavelet packet basis functions are employed...
Phase noise of transceiver local oscillator disturbs the orthogonality among subcarriers and causes inter-subcarrier-interference (ICI), which results in the significant degradation in the performance of wireless communication systems based on orthogonal frequency division multiplexing (OFDM). We observe that the inverse Fourier transform coefficient of the discrete phase noise varies gradually from...
In this paper, we investigate an efficient quadrature amplitude modulation (QAM) signal detection method in fast-moving multipath wireless channel using all phase fast-Fourier transform (ap-FFT) algorithm. As the amplitude spectrum of signal with the proposed detection algorithm is the square of that of fast-Fourier transform (FFT) and the phase isn't influenced by frequency shift between the transmitter...
A multiview stereo video FGS (Fine Granular Scalability) scalable scheme is presented in this paper. The similarity among adjacent views is fully utilized, A tradeoff scheme is presented in order to adapt to different demands of Quality First (QF) and View First (VF) of the decoder. The scheme is composed of three cases: I, P, B frame. The middle view is encoded as the basic layer, while the other...
Multiview stereo image composition mainly depends on the type of the multiview stereo display device. Currently, multiview LCD optical plate autostereoscopic display device is common in the art, while the composition method is limited. A new general multiview LCD stereo image composition method is proposed in this paper based on the optical plate LCD stereo display device. The proposed method mainly...
Orthogonal frequency division multiplexing (OFDM) systems based on discrete cosine transform (DCT) is proposed for the first time in this paper in order to solve the distortion due to great Peak-to-Average Power Ratio (PAPR) of OFDM systems signals. The character of the DCT energy focused is made use of in the frequency domain, and it helps to reduce the PAPR engendered by IFFT at the transmitter...
Aiming at the shortcoming which the pulse wave can not approach the UWB emission mask curve instituted by FCC, the method using Gaussian pulse wave combination sub-section approach is proposed. Firstly, the propriety pulse forming factor is selected to approach the emission mask and it can meet the property of each subsection. Then, the better combination pulse string of approaching emission mask...
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