What are the advantages and disadvantages of PWM over PPM?

Comparison Chart

Basis for Comparison	PAM	PWM
Immunity towards noise	Low	High
Signal to noise ratio	Low	Moderate
Need of synchronization pulse	Not exist	Not exist
Bandwidth dependency	On pulse width	On rise time of pulse

What are the advantages of PWM control in inverters *?

PWM enables the control of the average and/or RMS inverter output voltage. So it can regulate against load changes and DC supply voltage changes. By controlling the width of the chunks taken out of the output voltage over each cycle, the output voltage waveform can be shaped to minimise output harmonics.

What is the advantage of PPM compared with PWM?

L-PPM is widely used in wireless optical communication systems. It has an advantage in power and bandwidth efficiencies, whereas L-PWM is useful in remote control.

What is the main advantage of PPM over PAM and PWM?

Advantages of Pulse Position Modulation (PPM): Pulse position modulation has low noise interference when compared to PAM because amplitude and width of the pulses are made constant during modulation. Noise removal and separation is very easy in pulse position modulation.

What is the advantage of sine PWM over square wave control in DC AC converter inverter )?

Sine wave advantages over square wave Sine wave inverters are more efficient than square wave inverters, when it comes to the conversion of DC to AC. This ensures that the power loss is minimised, due to greater efficiency.

What is the disadvantage of PWM technique?

Disadvantage of PWM The disadvantages of PWM may be described by under: Due to the variable pulse width, the pulses have variable power contents. Hence, the transmission must be powerful enough to handle the maximum width, pulse, though the average power transmitted can be as low as 50\% of this maximum power.

What are the advantages of sinusoidal PWM?

Thus the SPWM technique has an advantage of having a constant switching frequency. A constant switching frequency makes it possible to calculate the losses of switching devices, so the thermal design for them becomes easier.

What is the main disadvantage of PPM?

Aside from the issues regarding receiver synchronization, the key disadvantage of PPM is that it is inherently sensitive to multipath interference that arises in channels with frequency-selective fading, whereby the receiver’s signal contains one or more echoes of each transmitted pulse.

What is the PWM technique?

Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts. The main advantage of PWM is that power loss in the switching devices is very low.