منابع مشابه
A Passive Front End of Radio Transceivers for LTE Bands
Software defined radio implementation is required for LTE radio transceivers. An SDR consists of an rf front end and a digital processor platform DSP. This paper is devoted to the design and implementation of the passive part of the front end; the antennas and bandpass filters. It presents the design of two microstrip patch antennas and a third order parallel coupled band pass filter with defec...
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Dynamic time-division duplexing (TDD) enables adjustments of uplink (UL) and downlink (DL) resources flexibly according to the instantaneous traffic load. Long-Term Evolution (LTE) systems can be implemented in TDD mode (TD-LTE). However, the dynamic change of a TDD configuration has not been well supported and investigated. In large macro cells, the high transmit power of base stations (BSs) e...
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The term Software Radio (SR) is used to encompass a wide range of agile, multimode, programmable radio systems that can operate over a wide frequency band, and be able to “speak” the language of the different protocols (IEEE Com., 1995)-(IEEE Pers., 1999). The evolution in the semiconductor industry leading to constant increase in the clock speeds and increase in device density, and the advent ...
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In recent years, mobile communication traffic has continuously been shifting from being dominated by voice-call traffic with symmetric uplink / downlink capacity requirements to burst-like traffic with strongly fluctuating capacity requirements depending on instantaneous file upload / download activities by mobile users. Consequently, LTE, which was originally designed with fixed FDD or TDD mod...
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In this paper, we evaluate the impact of copper (Cu) passive components on RF circuit performance. A fully-differential RF Frontend is used as a test vechicle to compare the Cu 0.18 copper process with a traditional 0.25 aluminium (Al) process. The RF Front-end contains a balun and a low noise amplifier (LNA) that are designed with spiral inductors and capacitors. CMOS spiral inductor Q values ...
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ژورنال
عنوان ژورنال: International Journal of Computer Applications
سال: 2015
ISSN: 0975-8887
DOI: 10.5120/20354-2542