Dual probe is capable of simultaneously measuring electric and magnetic fields in the same position, given that perfectly symmetric design realized on transmission paths connecting detection loop outputs. For general application, a calibration method for asymmetric probing near-field measurement with dual presented, order to deal failure traditional due transmissions both paths. The modeled, then proposed eliminate asymmetry further derived based two independent measurements at directions...

In order to improve the spatial resolution of a magnetic near field probe, design method combining multiple ports with production processes has been proven effective. However, asymmetry transmission structure introduced by junction between two different is key problem that limits performance these probes. this paper, differential probe (diff-H-probe) flexible printed circuit (FPC) process print board (PCB) manufactured achieve high resolution. The measurement results show can recognize...

Abstract This paper develops an active magnetic near field probe (H‐field probe) by using a four‐layer printed circuit board (PCB) technique. Two‐turn detection structure and low noise amplifier are used to improve probe's frequency response. The two‐turn can maximize the use of PCB stack resources, 14.5 dB gain increase signal output capability. then be for electromagnetic compatibility (EMC) test from 150 kHz 3 GHz. Compared with traditional shielded‐loop H‐field (TAHP) loop area 500 m,...

A multicomponent iterative method is proposed for efficient source reconstruction based on magnitude-only and single-plane near field scanning. Compared with the conventional filling data into a whole transformation matrix, can save huge calculation time by evenly reducing size of matrix magnetic group electric group, without losing solution accuracy equivalent dipole moments. The efficiency verified simulated patch antenna model. also applied to efficiently find sources reconstruct surface...

The frequency response and sensitivity of a near-field probe can be improved by using low-noise amplifier (LNA). In this communication, broadband active dual with two LNAs is proposed as high-performance detection tool for the first time. For passive probe, strictly symmetric structure required. However, symmetry difficult to achieve due many factors, such redundant transmission asymmetric LNA chip. Therefore, an calibration method (ACM) adopted eliminate effects structure, which broaden...

Abstract In this study, a near‐field dual probe with double‐loop structure is designed and characterised. The high‐performance, low‐loss Rogers material four‐layer printed circuit board are applied to design the double detection loop structure, which increases area effectively improves frequency response of probe. key parameters probe, including response, calibration factor, sensitivity, spatial resolution, isolation differential electric field suppression characterised by microstrip line....

In this article, an ungrounded double-loop active differential magnetic field probe (UDAHP) is proposed. The proposed includes two low-noise amplifiers (LNAs) and detection structure, which can ensure a high response. structure also shielded ground plate for suppressing electric coupling improving the common-mode rejection ratio (CMRR). Meanwhile, rotating asymmetric calibration method (RACM) used to correct probing system's asymmetry, improve CMRR, broaden measurement frequency range....

Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) is an attractive transmission technique for high-bit-rate communication systems. Like OFDM, one main disadvantage of MIMO-OFDM the high peak-to-average power ratio (PAPR) transmitter's signal on different antennas. The partial transmit sequences (PTS) approach provides optimal performance PAPR reduction. However computational complexity traditional PTS method tremendous. In this paper, a cooperative and...

Near-field mapping along the surface of an integrated circuit (IC) could reveal radiated emission source inside by collecting electromagnetic field. In this article, localization is first illustrated in a microstrip line model analyzing relationship between physical position and hot spots field distribution surface. The spot each magnetic does not necessarily correspond to due ground plane below. Furthermore, analogy with model, analysis applied large-scale IC [field-programmable gate array...

This paper presents optimal pilot sequences for the estimation of frequency-selective channels in multi-input multioutput orthogonal frequency division multiplex (MIMO-OFDM) systems. The channel solution has very low complexity and flexible antenna structure. With proposed structure, we can obtain mean square error (MSE) performance space domain peak to average power ratio (PAPR) OFDM symbols domain. Simulation results demonstrate effectiveness scheme.

Through the research of an 8PSK demodulation algorithm including carrier phase recovery and clock timing recovery, all-digital demodulator adaptive to next generation digital satellite television standard DVB-S2 is proposed. The consists a frequency detector (FD) loop modified phase-frequency (PFD) loop. Its tracking range exceeds one time symbol-rate. Gardner TED used in All algorithms are prone hardware implementation. By means analysis computer fixed point simulation, optimal parameter...

Abstract The strength property of slip zone soil determines the evolution mechanism and deformation damage landslides. When contains a certain amount hydrophilic minerals, it, therefore, has swelling properties. These properties cause mechanical cohesive soils to differ from those conventional-type soils. Thus, four cases typical landslide in Shanxi Province Yellow River Basin were used as research objects study minerals on mineral fractions analyzed using X-ray diffraction tests, followed...

It is a great challenge to design an On-Chip Bus (OCB) system meet the extremely high bandwidth requirements in HDTV SoC decoder. In this paper, OCB with throughput and flexibility based on multi-bus architecture proposed. A bus switch multi-level arbiter structure also constructed thereafter. Simulation results show that can ensure real-time performance of whole decoder very well.

The reliability and efficiency are the key properties of sync-search in DVB-S receiver. In this paper, a high performance parallel scheme is proposed. comparison between two sync byte matching strategies carried out practical structure with low hardware overhead

We derived exact closed-form expressions for the average symbol error rate (SER) M-ary differential phase shift keying (MDPSK), equal energy, equiprobable correlated binary signals, and pi/4 -differential quaternary phase-shift (DQPSK) with multiple-input multiple-output (MIMO) maximal-ratio combining (MRC) systems channel estimation in Rayleigh fading channels. Using moment generating function (MGF)-based analysis approach, we express SERs terms of Lauricella hypergeometric function, which...

A kind of L-band dissipative soliton resonance ring erbium-doped fiber laser based on nonlinear amplifying loop mirror is proposed. In the experiment, a 10 m long pumped by 980 nm semiconductor laser. The stable square wave pulses are observed at room temperature adjusting polarization controller. With increasing pump power, pulse width gradually broadened. Pumping power increased from 100 to 700 mW, corresponding obtained ps 3.7 ns. single energy 5.2 27.4 nJ, which shows has good stability....

For a massive multiple-input multiple-output system in the multi-cell scenarios, it generally suffers from pilot contamination due to fact that adjacent cells may use same sequences. In order reduce impact of on performance, novel iterative channel estimation method is proposed. Specifically, proposed method, besides sequences, data symbols decoded with high reliability are selected enhance estimation. Furthermore, selection criteria derived determine which reliably decoded. The simulation...

Trellis Code Modulation (TCM) has been widely used because it can obtain 2.55/spl sim/7.37 dB coding gain without bandwidth expansion or reduction of the effective information rates. Since Viterbi decoder plays an important role in realization HDTV system, we conduct research and development on integration decoder. This paper proposes a new VLSI design using ASIPs based hardware/software co-design idea. It reduces total time enhances reliability VLSI. We have successfully this method for...

Radio-frequency interference (RFI) problems in modern electronic product become complex which result the increasing number of scanning points. Conventional near-field phaseless source reconstruction methods such as double planes iteration method and single plane will spend a lot time both calculating. To save calculating time, an alternating iterative is proposed for based on magnitude-only single-plane near field scanning. Firstly, data divided into two groups group A B according to...