Question

suppose in a cdma system snr is 30db, total available bandwidth is 200 mhz, number of users is 100. what amount of bandwidth each user can enjoy?

Answer 1

In an ideal CDMA system with 100 users and 200 MHz of total bandwidth, each user can theoretically use up to the entire 200 MHz due to CDMA's spread spectrum technique.

Step-by-step explanation:

In a CDMA (Code Division Multiple Access) system, the total available bandwidth can be shared among all the users simultaneously because of the unique spreading codes used in CDMA technology. Given that the total bandwidth is 200 MHz and there are 100 users, each user can theoretically use the full bandwidth for their signal due to the spread spectrum technique of CDMA. However, in practical applications, other factors like signal-to-noise ratio (SNR), interference, and system design considerations will impact the actual bandwidth available to each user. The specified SNR of 30 dB does not directly affect the calculation of bandwidth per user because CDMA uses orthogonal codes to separate users within the same bandwidth. Therefore, each user in an ideal CDMA environment without considering multiuser interference or system limitations can enjoy up to the entire 200 MHz bandwidth.

Answer 2

Each user in a CDMA system with a total bandwidth of 200 MHz and 100 users can equally enjoy 2 MHz of bandwidth, assuming bandwidth is shared equally without CDMA's technical considerations.

Step-by-step explanation:

The correct answer is option that in a CDMA system with a total available bandwidth of 200 MHz and 100 users, each user can enjoy a bandwidth of 2 MHz if the use of bandwidth is divided equally among the users. CDMA allows for all users to share the same bandwidth simultaneously through the use of unique codes, hence we do not merely divide the total bandwidth by the number of users as we would with older technologies like FDMA or TDMA.

However, if we assume for simplicity that the bandwidth is equally shared without considering the technical nuances of code division multiple access, we simply divide the total bandwidth by the number of users. The correct answer is that each user can enjoy a bandwidth of 2 MHz. This can be calculated by dividing the total available bandwidth (200 MHz) by the number of users (100). By doing so, we get 2 MHz per user.