Posted by **Oddie** on Sunday, April 3, 2011 at 9:31am.

Hi,

Can someone please confirm the following for me ..

This realtes to PSK or phase shift keying.

Is it right that 8PSK uses eight different phase shifts each representing one of the eight patterns of three bits ... ??

Does it ehn follow that 256PSK uses 256 different phase shifts each representing one of the 256 patterns of eight bits ???

I base this assumption on ..

2 4 8 16 32 64 128 256

1 2 3 4 5 6 7 8 bits

Can you please confirm I am right ?

Thank you for your help

Oddie

- Computer science -
**MathMate**, Sunday, April 3, 2011 at 10:55am
You are right, but apparently 8PSK is the highest used, because the error-rate beyond that increases faster than the benefit.

To quote from the reference below:

"Any number of phases may be used to construct a PSK constellation but 8-PSK is usually the highest order PSK constellation deployed."

http://en.wikipedia.org/wiki/Phase-shift_keying

- Computer science -
**Oddie**, Sunday, April 3, 2011 at 11:57am
Thank you very much !

## Answer This Question

## Related Questions

- computer science - In a particular phase modulation system, each symbol is able ...
- math - The sinusoid y=3cos(x+3)-2 has which of the following? a. phase shift of ...
- maths - I have y=5sin(4x-pie/2). I need too find phase shift. I know c/b is ...
- Algebra II - State the phase shift of y=cos(theta-[pi/3]). Then graph the ...
- TOBOBPURSLEY - I thought phase shift was theta over omega correct??? and the ...
- Pre-calculus - State the period, phase shift, and vertical shift of the function...
- science - during which phase can fertilization occur A. phase 1 B. phase 2 C. ...
- Calculus. Please!! i need help so bad!!! - 1. Graph y =sec(1/2O-2pi)– 3. the O ...
- Math - Phase Shift? - What's the phase shift of "y = sin(3x - pi)"? Is it pi/3 ...
- Trigonometry - Write the equation of a sine wave (also called sine curve) given...

More Related Questions