One of the principle advantages of pulse position modulation is that it is an Mary modulation techniue that can be implemented noncoherently, such that the receiver does not need to use a phaselocked LOOP (PLL) to track the phase of the carrier.

This makes it a suitable candidate for optical COMMUNICATIONS systems, where coherent phase modulation and detecting are difficult and extremely expensive. The only other common Mary noncoherent modulation techniue is Mary freuency shift KEYING, which is the freuency domain dual to PPM.

The other advantages of pulse position modulation are:

• The amplitude is held constant thus less noise interference.
• Signal and noise separation is very EASY.
• Due to constant pulse widths and amplitudes, TRANSMISSION power for each pulse is same.

One of the principle advantages of pulse position modulation is that it is an Mary modulation techniue that can be implemented noncoherently, such that the receiver does not need to use a phaselocked loop (PLL) to track the phase of the carrier.

This makes it a suitable candidate for optical communications systems, where coherent phase modulation and detecting are difficult and extremely expensive. The only other common Mary noncoherent modulation techniue is Mary freuency shift keying, which is the freuency domain dual to PPM.

The other advantages of pulse position modulation are: