CDMA: It is known as “Code-Division Multiple Access”. Many radio communication technologies use the CDMA. It is an example of multiple accesses, where many transmitters can send data concurrently in a single communication channel. It belongs to the family of channel partitioning protocols and it also prevent in WLAN and cellular technologies.

Question

Want to see the full answer?

Answer 1

Question

Chapter 7, Problem P3P

Program Plan Intro

CDMA:

It is known as “Code-Division Multiple Access”.

Many radio communication technologies use the CDMA.

It is an example of multiple accesses, where many transmitters can send data concurrently in a single communication channel.

It belongs to the family of channel partitioning protocols and it also prevent in WLAN and cellular technologies.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Suppose that a binary message – either 0 or 1 – must be transmitted by wire from location Ato location B. However, the data sent over the wire are subject to a channel noise disturbance,so to reduce the possibility of error, the value 2 is sent over the wire when the message is1, and the value −2 is sent when the message is 0. If X, X = {−2,2}, is the value sent atlocation A, the value received at location B, denoted as R, is given byR = X + N ,where N is the channel noise disturbance, which is independent of X. When the message isreceived at location B, the receiver decodes it according to the following rule:if R ≥.5, then conclude that message 1 was sentif R < .5, then conclude that message 0 was sentAssuming that the channel noise, N, is a unit normal random variable and that the message0 or 1 is sent with equal probability, what is the probability that we conclude that the wrongmessage was sent? This is the probability of error for this communication channel

Consider the following scenario: Frames of 12000 bits are sent over a 400kbps channel using a satellite whose propagation delay is 270ms. Acknowledgements are always piggybacked onto data frames. (That is, in the case of stop-and-wait, the next frame cannot be transmitted until the entire frame containing the acknowledgement is received.) Five-bit sequence numbers are used. What is the maximum achievable channel utilization for (a) Stop-and-wait. (b) Protocol 5 (i.e., Go Back N). (c) Protocol 6 (i.e., Selective Repeat)

Suppose that a SW ARQ system with 1-bit sequence numbering has a time-out value that is less than the time required to receive an ACK. Station A sends 5 frames to station B. No errors occur during transmission of all 5 frames. One ACK is lost when it is transmitted the first time (see the following table), and no transmission of that ACK. No errors occur during transmission of the other 4 ACKS. Sketch the sequence of frame exchanges that transpire between stations A and B. (а) error occurs in re- Last digit of your student ID number 0, 1 2, 3 Lost ACK 1 4, 5 6, 7 8, 9 2 3 4