Difference Between CDMA and OFDM
Is CDMA is used in wireless networks?
Yes, CDMA is used in wireless local area networks (WLAN’s) and also used in 3G, 4G telephone networks. CDMA also used in satellite communications where large number of signals are transmitted simultaneously.
What is the Bandwidth of OFDM?
The total channel bandwidth of OFDM is 20 MHz(Mega Hertz), with an occupied bandwidth of 16.6 MHz(Mega Hertz).
State the reason why OFDM is called Orthogonal?
In the time of signal transmission the Sub Carriers are placed in such a way, so that they partially overlap with each other. The peak of the sub carrier intersects with the zero of the next or preceding sub carrier. This condition is called Orthogonality.
Difference Between CDMA and OFDM
Modulation methods are designed to be efficient in transmitting as many bits per hertz as possible. Here the goal is in the given bandwidth these modulation methods have to transmit the data at the highest speed and should minimize the use of spectrum space. Other Modulation methods that use bandwidth greater than the information bandwidth are called wideband modulation techniques. The two widely used wideband Modulation methods are Direct Sequence spread spectrum (DSSS )and orthogonal frequency-division multiplexing (OFDM).CDMA and OFDM both are wide-band wireless communication systems.
Table of Content
- CDMA
- OFDM
- Difference Between CDMA and OFDM
- Advantages
- Disadvantages
- Applications