Tutorial

How to Bulk Delete Comments by WordPress Plugin?

Sometimes our WordPress blog contain a huge number of bulk comments. When we remain busy to do our personal activity, we can not get time to approve bulk comments by login wordpress dashboard. Few days later when we log in wordpress dashboard, we get bulk comments if our bolg is popular. All bulk comments are [...]

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Metropolitan Area Networks

A metropolitan area network, or MAN, covers a city. The best-known example of a MAN is the cable television network available in many cities. This system grew from earlier community antenna systems used in areas with poor over-the-air television reception. In these early systems, a large antenna was placed on top of a nearby hill [...]

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Local Area Networks

Local area networks, generally called LANs, are privately-owned networks within a single building or campus of up to a few kilometers in size. They are widely used to connect personal computers and workstations in company offices and factories to share resources (e.g., printers) and exchange information. LANs are distinguished from other kinds of networks by [...]

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Semiconductor Diodes (Part 2)

Fig1.11: Reverse-biased p-n junction The number of minority carriers, however, that find themselves entering the depletion region will not change, resulting in minority-carrier flow vectors of the same magnitude indicated in Fig. 1.10 with no applied voltage. The current that exists under reverse-bias conditions is called the reverse saturation current and is represented by Is. [...]

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QPSK Tutorial

Offset QPSK (OQPSK) is a modified form of QPSK where the bit waveforms on the  I and Q channels are offset or shifted in phase from each other by one-half of a bit time. The amplitude of a QPSK signal is ideally constant. However, when QPSK signals are pulse shaped, they lose the constant envelope [...]

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FM modulation index

Minimum shift keying is a special type of continuous phase-frequency shift keying (CPFSK) wherein the peak frequency deviation is equal to ¼ the bit rare. In other words, MSK is continuous phase FSK with a modulation index of 0.5 .The modulation index of an FSK signal is similar to the FM modulation index, and is [...]

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Binary Phase Shift Keying

Binary Phase Shift Keying (BPSK) is a form of phase modulation using two different carrier phases to signal 1 and 0. BPSK is the simplest type of PSK. In binary phase shift keying(BPSK),the phase of a constant amplitude carrier signal is switched between two values according to the two possible signals m1 and m2 corresponding [...]

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