Shulou(Shulou.com)05/31 Report--

Hello everyone, Lin Fei to answer the above questions, what is the meaning of wcdma, what is the meaning of wcdma version, many people do not know, now let's take a look at it!

When we buy a mobile phone, we choose a variety of parameters. When using the network of operators, we will also see that different operators have different mobile network standards. For example, CDMA and WCDMA are used by two different operators in China, namely China Telecom and China Unicom. As users, the experience of these two networks is nothing more than which is faster and which is slower. Let's not explore the essential differences between them. Today, Benshaw will introduce you to the differences between the two networks.

Definition of CDMA

CDMA (Code Division multiple access), also known as Code Division multiple access (CDMA), is a technology for wireless communication. CDMA allows all users to use all frequency bands (1.2288Mhz) at the same time, regards the signals sent by other users as noise, and does not need to consider the problem of signal collision. The advantages of CDMA include: the voice coding technology provided in CDMA has better call quality than the current GSM, and it can reduce the noise of the surrounding environment when the user is talking, and make the call clearer.

Definition of WCDMA

WCDMA is the abbreviation of Broadband Code Division multiple access (WCDMA) and the third generation wireless communication technology. CDMA broadband CDMA is the third generation mobile communication system specially developed by 3GPP, which is based on GSM MAP core network and uses UTRAN (UMTS terrestrial wireless access network) as the wireless interface. At present, WCDMA has Release 99, Release 4, Release 5, Release 6 and other versions. At present, China Unicom adopts this 3G communication standard.

At present, the mainstream technologies of 3G are W-CDMA, CDMA2000 and TD-SCDMA3. The CDMA2000 technology proposed by Qualcomm has the highest maturity and has a significant improvement in spectrum efficiency.

The speed of the evolution route, but the global roaming capacity is general, South Korea has opened a CDMA2000 commercial network. W-CDMA supported by Europe and Japan has high spread spectrum gain, large space for development and the strongest roaming ability in the world. However, its technology is generally mature and has been put into commercial use in Japan.

The difference between WCDMA and CDMA

Before Qualcomm used it in IS-95 protocol, CDMA reuse technology had existed for a long time. However, this protocol is widely called CDMA because it has the principle characteristic of sharing multiple connections in the same frequency band as CDMA, which is different from other multiplexing schemes (such as GSM's TDMA). W-CDMA also uses CDMA multiplexing technology, which is similar to the Qualcomm standard. But W-CDMA is more than just a reuse standard. It is a complete set of specifications, which defines in detail how the mobile phone communicates with the base station, how the signal is modulated and how the data frame is constructed.

Although the name is similar to CDMA, W-CDMA has little to do with CDMA. How small most are depends on the foothold of different people.

In the field of mobile phones, the word CDMA can instead refer to CDMA technology, or it can refer to the family of CDMA standards developed by Qualcomm, including IS-95/CDMA1X and CDMA2000 (IS-2000).

Before Qualcomm used it in IS-95 protocol, CDMA reuse technology had existed for a long time. However, this protocol is widely called CDMA because it has the principle characteristic of sharing multiple connections in the same frequency band as CDMA, which is different from other multiplexing schemes (such as GSM's TDMA).

W-CDMA also uses CDMA multiplexing technology, which is similar to the Qualcomm standard. But W-CDMA is more than just a reuse standard. It is a complete set of specifications, which defines in detail how the mobile phone communicates with the base station, how the signal is modulated and how the data frame is constructed.

This is the professional difference between WCDMA and CDMA. After reading it, you should have a detailed understanding of the difference between the two. Going back to the beginning of our article, which of these two kinds of networks is faster and which is slower? Because CDMA is a 2G network standard and WCDMA is a 3G network standard, it is well known that 3G networks are faster than 2G networks, so WCDMA networks are naturally faster than CDMA networks. When choosing a network, users have to choose WCDMA network if they want to be fast.

At the end of this article, I hope it will be helpful to you.

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