Signal to interference ratio for CDMA

AI Thread Summary
The discussion centers on finding the signal to interference ratio (SIR) equation for CDMA systems that do not utilize frequency hopping or direct sequence techniques. The original poster has already researched these technologies and possesses the SIR equations for them but seeks a different approach. Responses indicate skepticism about the feasibility of deriving an SIR equation without these methods, suggesting that the standard models rely on them. The consensus leans towards the idea that such an equation may not exist outside of these established frameworks. The inquiry highlights the complexity of CDMA systems and the challenges in isolating SIR metrics.
Napsterz
Messages
1
Reaction score
0
Hi,

I am doing a project on communications engineering. I've done some background reading on CDMA and spread spectrum technologies such as Direct Sequence and Frequency Hopping. My project supervisor has asked me to find out the equation for the signal to interference ratio of CDMA systems not using frequency hopping or direct sequence. Is this possible? I read articles and books describing CDMA technologies and all of them mentioned either frequency hopping or direct sequence. ( I do have the equation of signal to interference ratio for direct sequence and frequency hopping)

Any help will be greatly appreciated

Thanks
 
Engineering news on Phys.org
Napsterz said:
My project supervisor has asked me to find out the equation for the signal to interference ratio of CDMA systems not using frequency hopping or direct sequence. Is this possible?
I don't see how it is possible.
 
Thread 'Weird near-field phenomenon I get in my EM simulation'

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...
View full post »

Thread 'EMF (Electromagnetic Field) & EHS (Electromagnetic Hyper Sensitivity)'

Hello dear reader, a brief introduction: Some 4 years ago someone started developing health related issues, apparently due to exposure to RF & ELF related frequencies and/or fields (Magnetic). This is currently becoming known as EHS. (Electromagnetic hypersensitivity is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed.) She experiences a deep burning sensation throughout her entire body, leaving her in pain and exhausted after a pulse has occurred...
View full post »

Similar threads

Cannot lock reference signal on lock-in amplifier
Replies
5
Views
2K
How are pseudo ranges obtained?
Replies
15
Views
4K
How to simulate multipath signals?
Replies
43
Views
6K
Intermediate Frequency vs Baseband Signal Processing
Replies
3
Views
12K
Can You Build a Simple Signaling Device for Equipment Management?
Replies
7
Views
3K
A The coherence length is much longer than the manufacturer claims
Replies
10
Views
2K
How to amplify the current of an AC signal?
Replies
14
Views
6K
Can a Copper Cable Effectively Pick Up Terahertz Signals?
Replies
4
Views
2K
Fourier transform fallacy? (Optics)
Replies
29
Views
3K
Modern Digital Audio: Understanding Dither and Oversampling in Hi-Res Age
Replies
17
Views
4K

Hot Threads

Recent Insights

Back
Top