Abstract An assessment of standalone GLONASS RTK performance is provided using its FDMA and CDMA signals. The new integer-estimable model (Teunissen 2019), which guarantees the integer-estimability ambiguities, employed. We introduce combined FDMA+CDMA compare strength against for instantaneous integer ambiguity resolution positioning. Various combinations signals are considered including L1, L...

Sparse code multiple access (SCMA) is one of the promising candidates for new radio interface. The generation communication system expected to support massive user with high capacity. However, there are numerous problems and barriers achieve optimal performance, e.g., multiuser interference power consumption. In this paper, we present optimization methods enhance spectral energy efficiency SCMA...

در این مقاله یک مدل ریاضی برای مسئله سیستم تولیدی همکارانه ساخت بر اساس سفارش با رعایت انصاف تخصیص بار‌های تولید طراحی شده است. اهداف اصلی مدل، کمینه‌سازی هزینه‌‌های کل و حداکثر استفاده از منابع به‌منظور عادلانه شرایط عدم­قطعیت کنترل پارامتر‌های غیرقطعی روش برنامه‌ریزی فازی ‌شده نتایج نشان می‌دهد افزایش نرخ عدم‌قطعیت، می­یابد. ازآنجاکه ظرفیت کارخانه‌ها ثابت است، مقدار تقاضا، هر کارخانه نیز می­ی...

This paper carries out a numerical simulation investigating three different modulation formats: carrier suppressed return to zero (CSRZ), modified duobinary (MDRZ) and (RZ). The purpose of this investigation is find the optimum format for hybrid optical code division multiple accesses–dense wavelength multiplexing (optical CDMA/DWDM) system with implementation an electro-optic phase modulator (...

Recently, exponential rise in the demand of wireless communication has led to gross reduction availability frequency spectrum meet proliferation demands. Overlay and underlay cognitive radio used address this problem is characterized with poor management assigned spectrum. The basic essential mechanism Radio (CR) find unused called Spectrum Sensing. This important optimizing allocation for incr...

OFDM, MC-CDMA and DS-CDMA are being researched vigorously as the prospective signaling technique for the next generation mobile communications systems, which will be characterized by the broadband packet technology. With packet transmissions, hybrid ARQ (HARQ) will be inevitable for error control. HARQ with rate compatible punctured turbo (RCPT) codes is one of the promising techniques. Data ra...

In this paper, new direct constructions of Z-complementary code sets (ZCCSs) from generalized Boolean functions are proposed. the literature, most ZCCS based on lead to sequences power-of-two length. study, we show that our proposed methods result in ZCCSs both length and non-power-of-two Since monomials degrees more than 2 employed constructions, can be obtained. The constructed admit theoreti...