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On the basis of the watermarking sparse feature in wavelet domain, a novel watermark blind attacking algorithm is proposed, in which the accuracy of the separation matrix was improved, by the using of sparse feature of watermarking distribution in wavelet domain, the original image is used as sparse components, the embedded watermark as noise, and sparse decomposition process associated with the ICA...
As extension of MIMO technology in cellular system with multiple cell sites, Cooperative Network MIMO is a hot topic for the research of future wireless communication. In current study of TD-LTE-Advanced (LTE-Advanced TDD) system, various coordinated beamforming schemes have shown to be very promising candidates. In this paper we introduce a few implementations of coordinated beamforming technology...
According to the correlation and statistical information of neighboring pixels in image, a statistical morphological predict operator is constructed based on the Markov random field theory, and the corresponding 2-D statistical morphological wavelet is also defined. Under the conditional probability density function in MRF model, It can be proved that more detail coefficients approach to zero after...
As the extension of MIMO technology in the system architecture with multiple cell sites, cooperative network MIMO is a hot topic for the research of future wireless communication. It is currently studied in 3GPP LTE-advanced and named as CoMP. In this paper we analyze the performance of network MIMO by theoretic calculation together with system level simulations. Cooperative schemes are introduced,...
With the increase in the number of motor vehicles, the speed of the car must be limited in different weather environment in order to ensure the traffic safety. According to the traffic safety problem in our country now days, 3DS MAX is used in the field of traffic simulation. This paper takes that the speed of car does not exceed 60 km/h when the visibility is between 100 m to 200 m for example. Firstly,...
With the increase in the number of motor vehicles, according to the traffic capacity problem in our country now days, 3DS MAX is used in the field of traffic simulation. This paper takes single intersection as a subject of research. Firstly, the car model, single intersection, lane and so on are created with 3DS MAX. Then, the simulation of cars that are passing the single intersection is realized...
In this paper an adjustable determinant pairing scheduling (ADPS) algorithm is proposed for virtual MIMO (multiple input and multiple output) in uplink 3G LTE (long term evolution) system. The key technique of virtual MIMO is the user pairing algorithm. Traditional pairing algorithms do not take into account the influence of slow fading. They cannot achieve the maximum throughput. The proposed ADPS...
HSDPA was firstly specified in release 5 of 3GPP to enhance higher downlink packet data rate on air-interface. There are many contributions to evaluate system performance and to investigate some advanced techniques in HSDPA, but most of which are focused on FDD system while TDD mode is rarely addressed. This paper studies HSDPA modeling with LCR TDD specifications, in which smart antenna techniques...
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