Multiplexing

Code-division multiple access (CDMA) Discussion of CDMA Code-division multiple access (CDMA) is a multiple access method used by different types of radio communication technologies. Direct-sequence spread spectrum signals uses CDMA which allow more than one user to share a channel. CDMA is a form of multiplexing which allows many signals to occupy a transmission channel and optimizing the use of available bandwidth. Therefore, the receiver separates the signals from the users by cross correlation of the received signal with each of the user unique code sequences. If the code sequence is designed to have a small cross correlation, it can minimize the crosstalk inherent. There is a spreading signal in code-division multiple access (CDMA) systems…

2. QPSK: When a data is transmitted using BPSK technique the channel bandwidth required is 2fb. The QPSK technique reduces that bandwidth to fb. It is a multilevel phase modulation. In this two successive bits in a bit stream are combined together to form a message and each message is represented by distinct value of phase shift of a carrier. The QPSK signal is represented as. Since there are 4 phases it is called as 4-PSK or Quadrature PSK systems [6][7]. 3. QAM: QAM improves the noise…

that is producing some promising results called multiplexing. Multiplexing is based on the idea that if two or more streams of information have enough similarities then they can be processed simultaneously with little to no lost efficiency. The lost efficiency often mentioned when switching tasks is what has been labeled in this instance, as cross-talk. “Cross-talk arises when two (or more) tasks make simultaneous demands on the same processing or representational apparatus” (Feng). For…

2 OFDM SYSTEM:- OFDM system is divided into three parts 1. multi carrier modulation 2. frequency division multiplexing 3. Orthogonal frequency division multiplexing. 1.Frequency division multiplexing:- Frequency Division Multiplexing is a form of signal multiplexing which involves assigning non – overlapping frequency ranges or channels to different signals or to each user of a medium. A gap is left between each of these channels to ensure that the signal of one channel does not overlap with…

NAME: LETHOLE RELEBOHILE STTUDENT NUMBER: 24570877 MODULE CODE: INYM 316 ASSIGNMENT 2 4/28/2016 1. a) Why circuit switching does not exploit statistical multiplexing Circuit switching deals with keeping some secure bandwidth when the circuit is being configured. The statistical multiplexing means splitting some links among different connections depending on the needs arranged by the connections. Circuits switching is not vigilant on whether single connections offers any other demands…

shake? In a Network, a 3 way handshake is a method used to create a connection between a local host or client and a server. Basically requires three steps from both the client and the server to exchange SYN and ACK packets before any communications begins. First the client sends a SYN packet asking the server if is open for a new connection, then the server responds with a confirmation packet or SYN/ACK, to what the client responds with an ACK packet and the connection is established. 3 way hand…

1. What file transfer protocols would you recommend? Be prepared to support your recommendations. The Data Link Layer allows various protocols to transmit data between nodes in a network. This layer involves framing of data, synchronization of nodes and multiplexing of nodes. The Transfer Control Protocol (TCP) and High-Level Data Link Control (HDLC) ensure the reliability of data. They ensure that data transfers from one node to the other without any error. Moreover, the data is transferred…

greatest admissible transmission rate of a message is straightforwardly corresponding to indicator power, and contrarily relative to channel clamour. It is the point of any interchanges framework to give the most noteworthy conceivable transmission rate at the least conceivable force and with the slightest conceivable commotion.  Multiplexing: Multiplexing is sending different signs or streams of data on a transporter in the meantime as a solitary, complex sign and after that recuperating the…

Texting while driving is dangerous and a potentially fatal behavior among the populace of college students with the influence one’s social network and how one identifies their significant other in that network being uniquely associated with this behavior. This study provided backing for the hypothesis that drivers who report texting and driving are more likely than drivers who report they do not text and drive to have others in their social network that hold comparable notions. Texting drivers…

the limits of the human brain. Several studies are completed, all of which display enough information to prove their theory is on the right track: the brain can be trained to multitask more efficiently. Some of the evidences that display these finding includes the results of various brain studies both before and after training. A significant increase in ability to process multiple streams of information is evident in those who underwent the preparatory training. *Feng, S., et al. "Multitasking…