There exist several variants of OFDM. DMT (Discrete Multi Tone) refers to a system for transmitting OFDM baseband. The COFDM (Coded Orthogonal Frequency Division Multiplexing) introduces error correcting code. WCP-OFDM (Cyclic Prefix Weighted Orthogonal Frequency-Division Multiplexing) includes the addition of a cyclic prefix and the weighting of the output signal of the transmitter to adapt the mobile multipath channels.
In the presence of a multipath channel, the reception of multiple echoes of phase may lead to fading (severe attenuation of a portion of the frequency band). As part of an OFDM system, it is generally impossible to reconstruct the symbols transported by subcarriers affected by these fainting phenomena. This can be explained by the fact that the non-precoded OFDM does not introduce redundancy (or frequency diversity). This drawback can be faded using the COFDM at the cost of reduced spectral efficiency.
OFDM as a block transmission system is generally introduced a guard interval between them. This eliminates interference between the successive blocks in the presence of multipath channels and especially facilitates the equalization, provided that the guard interval duration is greater than the arrival time of the last path. Two types of guard intervals are commonly used: the cyclic prefix, which consists of copying the last samples of the block to the top thereof and stuffing zeroes of inserting generic proscar leading zeros of the block. Both techniques naturally lead to a decrease in spectral efficiency.
When writing a research proposal on such a complex issue as orthogonal frequency-division multiplexing, college and university students have to deeply study and analyze all the aspects of the phenomena. They will have to process a great deal of relevant information in order to be able to deal with this complex issue. In addition to this, their research proposals have to be illustrated by their own fresh ideas on the subject.
One of the best ways to learn how to present your work results on paper is to study several free research paper topics on OFDM, which are presented in great quantity on the Internet. These free example papers, if prepared by experienced and skilful writers can always be great source of relevant data and be capable to teach beginners to outline their thesis statement, prepare, compose, and structure the core of their scientific presentation, and bring up interesting and argumentative conclusion.
Attention! Free research papers, examples of research papers and research paper samples on OFDM are easily traced by plagiarism checkers like Turnitin. All online research papers are plagiarized. Don’t submit free research projects as your own academic paper.
You can order a custom research paper on this topic at our professional research paper writing agency. Our PhD and Master’s degree holding academic experts will write a high-quality custom research paper, research proposal, term paper, essay or dissertation on any topic and subject. Our research paper service provides high school, college and university students with 100% original custom research papers written from scratch. We guarantee each customer confidentiality and prompt delivery. Feel free to place a free inquiry at our website now: