Evaluation: OFDMA & SC-OFDMA Performance on Wireless Communication
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 3, Issue 11
Abstract
This paper investigates OFDMA and SC-FDMA techniques combined with the Orthogonal Frequency Division Multiplexing (OFDM). Single carrier frequency Division Multiple Access(SC-FDMA) is a notable application of Multiple Input Multiple Output(MIMO) system. SC-FDMA is one of the most promising techniques aiming at solving the capacity problem of wireless communication systems and achieving higher spectral efficiency, depending on multiplexing signals based on their spatial signature. On the other hand most third generation mobile phone systems are using Code Division Multiple Access (CDMA) as their modulation technique. CDMA is not so complicated to implement as OFDM based systems. As CDMA has a wide bandwidth, it is difficult to equalize the overall spectrum - significant levels of processing would be needed for this as it consists of a continuous signal and not discrete carriers. Not as easy to aggregate spectrum as for OFDM. For this reason, CDMA is also investigating so that the performance of OFDM-SC-FDMA can be compared. Various OFDMA techniques are investigated including LTE or Long Term Evolution is the brand name given to the efforts of 3GPP 4th Generation technology development efforts mostly in Europe and UMB (Ultra-Mobile Broadband) is the brand name for similar efforts by 3GPP2, linear detection schemes, minimum mean square error, ordered successive cancellation, and maximum likelihood methods. Promising results are obtained to enhance spectral efficiency on the expense of computational complexity which needs to be addressed.
Authors and Affiliations
G. Manikandan
Keywords
Related Articles
- EP ID EP111498
- DOI -
- Views 74
- Downloads 0
A REVIEW PAPER ON OFFLINE SIGNATURE RECOGNITION SYSTEM USING GLOBAL FEATURE, ACO AND NEURAL NETWORK
Signature verification systems can be categorized as offline (static) and online (dynamic). This paper presents neural network based recognition of offline signatures system that is trained with low-resolution scanned si...
A Comparative Study Of Fatigue Failure Due To Acceleration Pulse Loading Over
This research paper deals with experimentation of a circular steel rod with specific geometry, for comparative study of fatigue failure test under constant speed and accelerated pulse speed. Two identical specimens are...
A New Approach towards Gas Sensing through A.C. Conductivity of Tin Oxide-Copper Oxide Composite
Tin oxide- Copper oxide composites were synthesized by a hydrothermal method using tin chloride dihydrate and copper nitrate trihydrate as precursors in different molar ratios. The obtained powders were characteri...
Performance and Emission Characteristics of a Four Stoke Diesel Engine Operated by Neem Biodiesel Blended with Diesel
Industrialization and motorization of the world has led to a steep rise in the demand for petroleum products and other side the fast depletion of fossil fuel reserves and issues like global warming have led the re...
AN IMPROVED HYBRID BINARIZATION TECHNIQUE FOR DEGRADED DOCUMENT DIGITIZATION
In document analysis, binary image representation is essential format. In previous studies, different techniques are implemented and tried and true for different types of degradation in document image. But non...