Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
THE high spectral efficiency makes OFDM a suitable technology to meet the demands of wireless data traffic. A currently discussed new application are OFDM based overlay systems. In this concept, an overlay system shares the same frequency band with a licensed system by filling existing frequency gaps with OFDM subcarriers. However, OFDM suffers from high out-of-band radiation caused by sidelobes of the modulated subcarriers. Well-known techniques for sidelobe suppression are windowing the transmission (Tx) signal in time domain and the insertion of guard bands. With the former method, the symbol duration is prolonged, whereas with the latter the scarce spectral resources are wasted. Both methods reduce the system throughput and, in general, do not achieve sufficient sidelobe suppression for OFDM based overlay systems. To overcome the drawbacks of the existing techniques for sidelobe suppression we propose the concept of cancellation carriers. The basic idea is to insert a few well-defined subcarriers, referred to as cancellation carriers (CCs), at both sides of the spectrum which are weighted such that their sidelobes cancel the sidelobes of the Tx signal. In, a similar concept based on the insertion of dummy tones has been proposed for amplitude shift-keying modulation in wire line applications. However, these dummy tones are restricted to carry weighted sums of the data on other subcarriers.
Router(config-if)# bandwidth 56
What are the concerns of the Physical Layer? Physical layer coordinates the functions needed to transmit a bit stream over a physical medium. a. Physical characteristics of in
NETWORK OWNERSHIP: There are two types in this case: 1. Private Network 2. Public Network
Describe the concept of internetwork and intranetwork routing protocols?
persistent
What is silly window syndrome? It is a difficulty that can ruin TCP performance. This problem happens when data are passed to the sending TCP entity in large blocks, but an int
State the congestion avoidance process Notifies the source that congestion avoidance process should be initiated where applicable for traffic in the opposite direction of the r
5. CSMA/CD based Ethernet LANs in various sites and Frame Relay (FR) service to connect them together. You want to make a difference in the organization by upgrading the LANs to be
Efficiency :- The other main metric used for performance measurement is efficiency of parallel computer system i.e. how the resources of the parallel systems are being utilized
In a client's software , the structure of an Internet server's address keyed is as follows: Where: http refer for the communication protocol to be used www refer for th
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd