What is the bandwidth of CDMA mobile?

Answer 1

There are several possible answers to this question.

Various portions of the total electromagnetic spectrum have been set aside for mobile communications, each with an allocated bandwidth, typically quite large.

Some idea of the complexity of the allocation of the total spectrum and its size may be seen by viewing the following chart:

www.ntia.doc.gov/osmhome/allochrt.pdf

Conversely, there is an allocated bandwidth for each individual carrier for each type of service, and there are many types of service.

A comprehensive list of device bandwidths may be found at:

http://en.wikipedia.org/wiki/List_of_device_bandwidths

That list actually gives data rates, which are not the same as the bandwidth or spectral occupancy of the radio carrier in use. The actual bandwidth depends on data rate, modulation technique, coding, filter rolloff, access method, and guardbands. If you have a particular service in mind, I may be able to calculate the bandwidth for you.

Answer 2

800 mhz & 1.8 ghz - This was the first answer given.

Hertz is a measurement of the speed of a transmission with respect to electrical wave produced. A technique is then used by the sending and receiving device to transmit data on the waves produced. This can be from 1 to many bits per wave. If a transmission is made on a square wave on the rising and falling edge, then that would be 2 bits per wave. If the wave was produced a thousand times per second, that would be 2,000 bits per second and that would be the bandwidth.

The bandwidth is the multiplication of the speed of the wave in Hertz (capitalised as it is a person's surname) and the amount of bits transferred per wave.

A network cable working at 100Mbps, transfers 100 million bits per second, but does not necessarily have a wave running at 100MHz with one bit per wave. i.e. Cat 4 TP implemented as Fast Ethernet.

The bandwidth of EDGE, which is an enhancement of GPS is 384Kbps

CDMA is a competing technology to GPS and is, as far as I am aware, better than this because it distributes the call data in a different way. The base speed is 9.6Kbps, which is the same a GPS. Voice is tranmitted at 8Kbps. All the connections share the Spread Spectrum used by CDMA allowing up to 1.23Mbps, allowing up to 131 simultaneous connections as opposed to 48 GSM connection at a similar bandwidth of 1.23Mbps, however GPS does not support this bandwidth, so less connections are allowed simultaneously

Answer 3

The amount of data that can be transferred through a communication medium in a unit of time is called bandwidth. The bandwidth of digital signals is measured in bits per second or bytes per second. The bandwidth of analog signals is measured in cycles/seconds or hertz.

The path through which data is transmitted from one place to another is called communication media or communication channel.

Answer 4

Typically its 900mhz or 1800mhz.