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This paper adopts the classical MUSIC algorithm. According to that the classical MUSIC algorithm has a clear operation process and has large amounts of computation, the heterogeneous multi-core system are selected to implement the MUSIC algorithm. The calculations of different types of tasks are assigned to different types of processor cores, mapping the MUSIC algorithm to the heterogeneous multi-core...
This paper presents a background calibration algorithm based on the interpolation filter and the Least Mean Square (LMS) algorithm, taking the 5-channel Time-Interleaved Analog to Digital Converter(TIADC) as the model. And the algorithm is verified by the Simulink modeling and hardware. Comparing the spectra of the signals before and after calibration in the Simulink model, the ENOB rises from 3.62446...
This paper presents a background calibration technique for gain error in Time-interleaved (TI) analog-to-digital converters (ADCs). The presented calibration technique is based on statistical characteristics of the input signal and error information can be obtained by analyzing the statistical properties of the input signal. Compared with conventional calibration algorithm, the presented calibration...
Firstly, this paper introduces the classification of different abstraction level of system model and puts forward these questions needed to be solved during the establishment of system model. Secondly, it gives the analysis of the advantages and disadvantages of all existing solutions and implements the modeling based on the method of interface encapsulation. Thirdly, the paper elaborates the merits...
Often graphic processing units (GPGPUs) are used for data processing as the range-Doppler algorithm is computationally expensive and highly parallel. However, GPGPUs may not be an appropriate solution for applications with strictly constrained space and power requirements. In this paper, we implemented a FPGA-based multi-core system for SAR data processing with Range-Doppler algorithm. Our system...
This paper presents a 12-bit 400-MS/s pipelined analog-to-digital converter (ADC) without using a front-end sample-and-hold amplifier. A novel timing diagram is proposed to maximize available settling time of residue voltage and minimize distortion. We adopt time constant matching between the first sub-ADC and the multiplying digital-to-analog converter and dynamic comparators without a pre-amplifier...
In this paper, a pseudo-random sequence into the digital background calibration algorithm applied in the calibration of gain error in pipeline ADC is presented. The LMS algorithm is used to establish adaptive process for gain error estimation and real-time calibration of the signal. In view of the traditional PN injection amplitude algorithms cannot satisfy redundancy calibration and the problems...
Graphene devices can be used to electromagnetic information field base on their peculiar electromagnetic properties. These devices, which have advantages in terms of small size, high switching speed, and high switching reliability, will be instead of the variable capacitances or mechanical contacts. In this paper, we present a modeling of graphene nanoribbon field-effect transistor, and a simulation...
The decomposition of signal subspace and noise subspace is a difficult problem for hardware implementation of MUSIC algorithm. In order to solve the above problem, this paper researches multiple Jacobi algorithms and adopts the combination of the sorted and clearance Jacobi algorithm to improve the efficiency. Meanwhile, this paper gives some algebra for source number estimation. Compared with traditional...
In cognitive radio networks, security against eavesdroppers is a critical issue. In this paper, we consider a scenario in which the primary transmitter selects one secondary transmitter to act as a relay to enhance the security of communication. And as a reward the primary transmitter allows the selected secondary transmitter to access its spectrum. We first formulate the problem as a stackelberg...
Bag Of computational verbs (BoCV) is a new framework based on computational verb theory. In this framework, verb similarities are summed up or averaged. The value of result is put into a bag as an entry for description in order that many verbs similarities can make up the final feature vector implicitly. A novel model called spatiotemporal verb bag (SVB) is proposed and it is trained in a supervised...
High Efficiency Video Coding (HEVC) has significantly improved in efficiency compared to the last H264/AVC. HEVC finds the best intra prediction mode with the least rate distortion (RD) cost by iterating all over the possible depth level and prediction modes which causes a dramatic increase in computational complexity. In this paper, we propose a fast CU size decision and mode decision algorithm for...
Target tracking is one of the important applications for wireless sensor networks (WSNs) that are deployed into a remote and hostile environment. In such environments, sensor nodes may be compromised by intruders to distort the integrity of data by sending false data reports, injecting false data during target tracking, and disrupting transmission of sensed data. For mission critical WSNs, such as...
Femtocell is considered as a cost-effective solution to get better indoor services. However, closed-access femtocells in co-channel deployment with macrocells are assumed, potentially serious downlink femto-macro interference may cause performance deterioration of macrocell networks. Especially for macro users nearby femtocell, they will receive serious interference from femtocell, and experience...
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