An improved modulation method is proposed for two parallel three-level interleaved rectifiers to reduce current harmonics and high-frequency zero-sequence circulating current, which uses sinusoidal pulse width modulation. First, a model of the constructed, main factor affecting line performance discussed. Second, are priority optimization target guarantee better performance. Finally, an exchang...

We demonstrate a new experimental approach for flexible femtosecond pulse generation in the mid-IR by use of difference-frequency generation from two tightly synchronized Ti:sapphire lasers. The resultant mid-IR pulse train can be easily tuned, with an adjustable repetition frequency up to 100 MHz, a pulse energy of approximately 1.5 x 10(-13) J, and an intensity noise similar to that of the Ti...

In this paper, a novel pulse shaping method is presented for Orthogonal frequency division multiplexing with offset quadrature amplitude modulation (OFDM/OQAM) systems. Designed as a linear combination of normalized Hermite functions, the proposed pulse is optimized with respect to interference caused by insufficient synchronization such as carrier frequency offset (CFO) and timing offset (TO)....

In order to achieve the transformation of electrical energy in Variable Speed Constant Frequency (VSCF) Wind Power Generation System (WPGS), a novel Space Vector Pulse Width Modulation (SVPWM) pulse trigger technology applied in high efficient PWM rectifier is proposed. Rectifier is an important part of WPGS and its performance affects the harmonic content and power factor of the power energy d...

This paper derives Cramer-Rao bounds on estimates of the Doppler-shifted frequency of a coherent pulse-train intercepted at a single moving antenna. Such estimates are used to locate the emitter that transmitted the pulse train. Coherency from pulse to pulse allows much better frequency accuracy and is considered to be necessary to support accurate emitter location. Although algorithms for esti...

In this paper, a very low power and low complexity all digital impulse radio ultra wideband (IR-UWB) transmitter is presented. The pulse repeating frequency (PRF) of the transmitted signal is controlled digitally, which complies with federal commission committee (FCC) regulations. In order to control the transmitted power the amplitude of transmitted signals is reduced by increasing the PRF. Th...

ELINT/ESM type of electronic intelligence in the primary layer uses parameters measurements of intercepted radar signals. Nowadays modern radar uses more and more complex waveforms. Some waveforms are developed intentionally to make their intercept almost impossible. The main distinctive features of modern radar signal are hidden in its time-frequency structure. In the near past the problem of ...

Emerging systems such as Internet-of-things (IoT) and machine-to-machine (M2M) communications have strict requirements on the power consumption of used equipments associated complexity in transceiver design. To meet these requirements, we propose a novel index modulation (IM) scheme, namely pulse (PIM) for single-input single-output (SISO) schemes. The proposed model uses well-localized orthogo...

N.K. Askar, S.C. Lin, H.D. Pfister, G.E. Rogerson, and D.S. Furuno General Atomics, Photonics Division, 10240 Flanders Court, San Diego, California 92121 {naiel.askar, susan.lin, henry.pfister, gerald.rogerson, david.furuno}@gat.com Abstract. Spectral Keying (SK) is a novel UWB modulation scheme that combines properties of both Frequency Shift Keying and Pulse Position Modulation. An SK symbol...

A novel quasi-coherent noise jamming method is proposed against linear frequency modulation (LFM) signal and pulse compression radar. Based on the structure of digital radio frequency memory (DRFM), the jamming signal is acquired by the pseudo-random sequence phase-modulation of sampled radar signal. The characteristic of jamming signal in time domain and frequency domain is analyzed in detail....