What is Wideband Code Division Multiple Access (WCDMA)?

What does WCDMA stand for?

Wideband Code Division Multiple Access (WCDMA) is a third-technology (3G) widespread that employs the direct-sequence Code department more than one Access (DS-CDMA) channel get entry to Method and the frequency-division Duplexing (FDD) technique to offer high-speed and excessive-Capacity Carrier. WCDMA is the most usually used version of the Universal Mobile Telecommunications System (UMTS). It became evolved by Japan’s NTT DoCoMo and shaped the premise of its Freedom of Multimedia Access (FOMA) 3G Network.

What Does Wideband Code Division Multiple Access Mean?

The WCDMA sySTEM is a part of the UMTS. It is evolved by the 3G Partnership Program, which consists of developed middle mobile networks that belong to the Global System for Mobile (GSM) communications networks international.

WCDMA capabilities two Modes:

• Frequency Division Duplex (FDD): Separates users through using both codes as well as frequencies. One frequency is used for the Uplink, even as any other is used for the Downlink.
• Time Division Duplex (TDD): Separates users by way of using codes, frequencies and time, wherein the same frequency is used for both uplink and downlink.

Although WCDMA is designed to Function on advanced GSM center networks, it uses code division a couple of get right of entry to (CDMA) for its air Interface. In fact, the bulk of the 3G structures in operation hire CDMA, whilst the rest use time department more than one get entry to (TDMA). The TDD mode of WCDMA genuinely employs a combination of TDMA and CDMA.

CDMA allows multiple customers to proportion a channel at the identical time, even as TDMA lets in customers to proportion the equal channel by using chopPing it into extraordinary time slots. CDMA offers the advantages of multipath diversity and tender Handoffs.

As an air interface era, WCDMA is able to artificially growth a Signal’s Bandwidth. It does so with the aid of modulating every Baseband image with a Binary or quaTernary signature with a much higher rate than that of the authentic inFormation image.