The advantages and Disadvantages of CDMA

Here are the advantages and disadvantages of CDMA:

The Advantages of CDMA:

• Enable integration of voice, data and video. Spread-spectrum and power-control functions that increase the capacity of CDMA call bandwidth is sufficient for a variety of multimedia data services, and the soft hand-off scheme ensures no data loss.

• Number of subscribers in a cell may access the frequency spectrum bands together for a particular encoding technique. Considered more advanced than CDMA digital cellular system that already exists. FSN is able to provide a more natural sound than the perfect digital cellular systems that already exist.

• Have very low power output that is 0.2 watts (compared to the GSM system) that use 1.5 to 3 watts, making batteries CDMA system more durable. Requires lower transmit power, so cell phone talk time may be longer.

• Cost burden on the CDMA phone can be cheaper because customers are not charged for airtime that has trapping GSM users. Moreover cost-effective enough because it is calculated in real time the credit is calculated per second, without rounding as well as GSM credit counting so far applicable.

• Improve sound quality.

• Requires lower transmit power, so cell phone talk time may be longer.

• Can be operated in conjunction with other technologies (e.g. AMPS)

• It does not require the allocation and management of frequencies. On TDMA and FDMA, frequency management is a critical task to be completed. Because there is only one common radio channel in CDMA, no frequency management is needed.

The Disadvantages of CDMA:

• Advantages GSM-based technology is a broad coverage and vast roaming both in the country and even around the world, while CDMA is still very limited.

• Moreover there was a problem of coverage optimization because the CDMA coverage can expand and shrink. This phenomenon is known as breathing. In the normal condition where the number of channels / users in accordance with the draft then the noise of other users is not too much. But as the number of channels / users increased in some cells, then the noise of the channel / user will also be increased so that the power control will be ordered to increase the transmit power.

• With the increase noise power of the canal / other users, then the channel / user located some distance to the base station must be running out of transmit power (maximum already) that can result in broken call. As a result of this, the system is narrowing the scope of a cell. When several adjacent cells shrink then the border area between the cells becomes not covered (blank spot).