The detection and recovery algorithms of binary data is very complex.It allows data to be carried along a communication signal much more efficiently as compared to FSK.It is a more power efficient modulation technique as compared to ASK and FSK.It has double data rate carrying capacity compare to BPSK as two bits are mapped on each constellation points. QPSK uses phase shifts of multiples of 90 degrees. It uses four phases to encode two bits per symbol. Package includes: 1x Optical and coaxial digital audio to analogue. This technique is used to increase the bit rate i.e we can code two bits onto one single element. This small DAC (Digital to Analog audio converter) requires a 5 Volt DC 2 Amp power supply. This is regarded as the most robust digital modulation technique and is used for long distance wireless communication. In Binary Phase shift keying, difference of 180 phase shift is used between binary 1 and binary 0. The Phase of the carrier wave is changed according to the two binary inputs. Phase Shift keying – In this modulation the phase of the analog carrier signal is modified to reflect binary data.The amplitude and frequency of the carrier signal remains constant.īPSK also known as phase reversal keying or 2PSK is the simplest form of phase shift keying.
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