Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Maximum vehicle speed.

Status
Not open for further replies.

anwersbh

Newbie level 5
Joined
Nov 2, 2014
Messages
8
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
54
Please I want the solution for the question below:

Consider a mobile wireless system, using QPSK modulation at 25 Ksymbols/s, and a carrier frequency of 1900 MHz. What is the fastest speed in km/h that is permissible for a vehicle using such system, if its required that the change in phase due to Doppler spread does not exceed 5 degree/ symbole?
 

if this is a homework question, say so

guidance:
at your symbol rate, what is the time per symbol?

how much time per symbol is a 5 degree shift?

doppler shift:
https://en.wikipedia.org/wiki/Doppler_effect
the radar section

remember that radar requires the return signal, while you do not
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top