Optimized Scheduling Technique of Null Subcarriers for Peak Power Control in 3GPP LTE Downlink
Joint Authors
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-04-17
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
Orthogonal frequency division multiple access (OFDMA) is a key multiple access technique for the long term evolution (LTE) downlink.
However, high peak-to-average power ratio (PAPR) can cause the degradation of power efficiency.
The well-known PAPR reduction technique, dummy sequence insertion (DSI), can be a realistic solution because of its structural simplicity.
However, the large usage of subcarriers for the dummy sequences may decrease the transmitted data rate in the DSI scheme.
In this paper, a novel DSI scheme is applied to the LTE system.
Firstly, we obtain the null subcarriers in single-input single-output (SISO) and multiple-input multiple-output (MIMO) systems, respectively; then, optimized dummy sequences are inserted into the obtained null subcarrier.
Simulation results show that Walsh-Hadamard transform (WHT) sequence is the best for the dummy sequence and the ratio of 16 to 20 for the WHT and randomly generated sequences has the maximum PAPR reduction performance.
The number of near optimal iteration is derived to prevent exhausted iterations.
It is also shown that there is no bit error rate (BER) degradation with the proposed technique in LTE downlink system.
American Psychological Association (APA)
Cho, Soobum& Park, Sang Kyu. 2014. Optimized Scheduling Technique of Null Subcarriers for Peak Power Control in 3GPP LTE Downlink. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1049041
Modern Language Association (MLA)
Cho, Soobum& Park, Sang Kyu. Optimized Scheduling Technique of Null Subcarriers for Peak Power Control in 3GPP LTE Downlink. The Scientific World Journal No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-1049041
American Medical Association (AMA)
Cho, Soobum& Park, Sang Kyu. Optimized Scheduling Technique of Null Subcarriers for Peak Power Control in 3GPP LTE Downlink. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1049041
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1049041