We explain the difference between CDMA and WCDMA with table. Intercom devices have proven to be very useful in this 21st century. Before, we had cell phones, pagers, radios, etc. Today, thanks to the Internet, most of our devices are connected through it. Be it our computers, our televisions, our cell phones, anything. However, we must analyze the most fundamental aspects of this type of communication network. How do they work and why? This is where CDMA and WCDMA come into play.
CDMA stands for Code Division Multiple Access. Basically, it is an algorithm that helps the user to capture several channels to use them in the same bandwidth. So in simple terms, it improves connection by accommodating more users per MHz of bandwidth. difference between CDMA and WCDMA
WCDMA stands for Wideband Code Division Multiple Access. It basically uses the same technology as CDMA but incorporates it into 3G. This works with GSM and EDGE to be used as UMTS and also resulted in higher internet speed.
What is CDMA?
CDMA stands for Code Division Multiple Access. Basically, it is an algorithm that helps the user to capture several channels to use them in the same bandwidth. So in simple terms, it improves connection by accommodating more users per MHz of bandwidth. So in a way, CDMA multiplexes multiple signals to fit a single given bandwidth. CDMA generally operates in the ultra-high frequency region, which is primarily between 800 MHz and 2 GHz. difference between CDMA and WCDMA
However, the CDMA mode of operation should not be confused with the usual time and frequency multiplexing methods. This is because, in CDMA, a client can access the network all the time, without supposed interruptions. The main reason for this is that this algorithm gives each user a unique identity, which helps to identify two different customers.
CDMA operation is an intricate mechanism, allowing up to 61 users at the same time, and snapping them all into the same 1.23 MHz. There are 64 Walsh codes. These codes help the algorithm to differentiate between the theoretical limits and the calls. However, in real-time applications, due to technical limitations and quality purposes, the actual number is usually less than this number. difference between CDMA and WCDMA
Using CDMA has its own advantages and disadvantages. The main advantages of using CDMA include low interference due to transmission bursts, the use of rake receivers to upgrade receivers. Use of flexible handover, which helps to switch mobile stations without changing operator.
The main disadvantages of CDMA include delay due to large code size, the requirement for precise time synchronization, and gradual handoff often saturating radio capacity.
What is WCDMA?
WCDMA stands for Wideband Code Division Multiple Access. It basically uses the same technology as CDMA but incorporates it into 3G. This works with GSM and EDGE to be used as UMTS and also resulted in higher internet speed. WCDMA stands for the jump from 2G to 3G and is therefore way ahead in terms of speed. This is for a very specific reason. CDMA is a competitor to GSM and therefore they did not incorporate technologies to build something faster and stronger. However, WCDMA incorporates GSM and EDGE, which eventually led to UMTS. This resulted in better connectivity, better capacity, and better speed.
WCDMA supports a wide range of technology connectivity, such as cellular voice, text, MMS, and 3G. difference between CDMA and WCDMA
WCDMA implements a direct sequence code division method (DS-CDMA) channel access method, a frequency division duplex. These help you achieve better connectivities and higher speeds.
WCDMA has two modes:
- Frequency Division Duplex (FDD) – This is a method of separating users by software and hardware. They use the code and frequencies to differentiate users. Two frequencies are used. One of them is the uplink and the other is the downlink.
- Time Division Duplex (TDD) – In this method, in addition to the frequencies and code used in FDD, time is another factor used to differentiate between users.
The advantages of WCDMA include higher connection speeds and stronger networks. The main disadvantages of WCDMA are that it is not used worldwide, so there is a compatibility problem for many phones.
Difference between CDMA and WCDMA with table
The difference between CDMA and WCDMA is that CDMA is the technology used in 2G networks, while WCDMA is the technology used in 3G networks.
Comparison table between CDMA and WCDMA
|Definition||CDMA is an algorithm that brings more channels in a specific bandwidth.||WCDMA uses basic CDMA technology but incorporates it into GSM and EDGE.|
|Net||Used in 2G network.||Used in 3G network.|
|Velocity||Relatively slower than WCDMA.||Faster than CDMA.|
|GSM||It is a rival to GSM.||It works with GSM.|
|Broadband||1.25 MHz.||5 MHz.|
Main differences between CDMA and WCDMA
- The main difference between CDMA and WCDMA is that CDMA is an algorithm that generates more channels in a single bandwidth, while WCDMA uses CDMA and incorporates GSM and EDGE in it.
- CDMA is used on a 2G network, while WCDMA is used on a 3G network.
- CDMA is slow compared to WCDMA.
- CDMA competes with GSM, while WCDMA works with it.
- CDMA operates on a 1.25 MHz bandwidth while WCDMA operates on 5 MHz.
In this modern age, where connections are more important than ever, it is now necessary to stay connected. We need strong, reliable and fast connections. Technology, whether it be software or hardware, continues to evolve at a rapid pace to provide us with these benefits.
Both CDMA and WCDMA are the result of this, and this is not the last step in the human history of efficient communication. There will be more to come, with speeds that will blow the human mind!