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Digital Communication

Modulated 4 ASK Signal

Amplitude Shift Keying (ASK) is a type of digital modulation in which the amplitude of the carrier is varied with respect to the digital message. If we send one bit/symbol, we call it as Binary Amplitude Shift Keying (BASK), in which case the carrier amplitude is assumed to have 2 values (one corresponding to 1 and other corresponding to [...]

BPSK Modulated Signal Waveform

Binary Phase Shift Keying (BPSK) is a type of digital modulation technique in which we are sending one bit per symbol i.e., '0' or a '1'. Hence, the bit rate and symbol rate are the same. Depending upon the message bit, we can have a phase shift of 0o or 180o with respect to a [...]

Bipolar NRZ-L, Bipolar RZ, Manchester-L

In order to transmit the bits over a physical channel they must be transformed into a physical waveform. A line coder or baseband binary transmitter transforms a stream of bits into a physical waveform suitable for transmission over a channel. Line coders use the terminology mark for “1” and space to mean “0”. In a [...]

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