High peak to average power ratio (PAPR) is one of the major drawbacks in
orthogonal frequency division multiplexing (OFDM) systems. In recently years,
various methods have been proposed to reduce the PAPR performance. The
selected mapping (SLM) scheme is perhaps the most popular one because it
provides outstanding PAPR reduction performance. In addition, the subcarrier
magnitude remains the same in the SLM scheme. However, there are two major
shortcomings in the SLM scheme. First of all, it requires a number of inverse fast
Fourier transforms (IFFTs) to produce candidate signals, dramatically
increasing the computational complexity. In addition, side information has to be
transmitted to the receiver to indicate the candidate signal that results in the best
PAPR, leading to the decrease in bandwidth utilization. To overcome these two
drawbacks, this thesis proposes a novel SLM scheme that does not need side
information. The proposed scheme is based on a low complexity SLM scheme
[C.-P. Li, S.-H. Wang, and C.-L. Wang, ¡§Novel low-complexity SLM schemes for
PAPR reduction in OFDM systems,¡¨ IEEE Trans. Signal Process., vol. 58, no. 5,
pp. 2916¡V2921, May 2010] in pilot-aided OFDM system. Simulation experiments
are conducted to verify the performance of the proposed scheme. It is shown that
the bit error rate (BER) performance of the proposed scheme is very similar to
that of the traditional SLM scheme with perfect knowledge of the side
information. Therefore, the proposed scheme not only has the advantages of low
complexity and high bandwidth utilization, but also has a superior BER
performance.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0826110-120317 |
| Date | 26 August 2010 |
| Creators | Kuo, Keng-wei |
| Contributors | Ding-Bing Lin, Chin-Liang Wang, Chih-Peng Li, Char-Dir Chung, Chao-Tang Yu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826110-120317 |
| Rights | campus_withheld, Copyright information available at source archive |
Page generated in 0.0052 seconds