Interleaved PC-OFDM to reduce peak-to-average power ratio
Jayalath, Dhammika & Tellambura, Chintha (2002) Interleaved PC-OFDM to reduce peak-to-average power ratio. In Wysocki, Tadeusz A., Darnell, Michael, & Honary, Bahram (Eds.) Advanced Signal Processing for Communication Systems. Kluwer Academic Publishers (Springer), Boston, pp. 237-250.
Parallel combinatory orthogonal frequency division multiplexing (PC-OFDM yields lower maximum peak-to-average power ratio (PAR), high bandwidth efficiency and lower bit error rate (BER) on Gaussian channels compared to OFDM systems. However, PC-OFDM does not improve the statistics of PAR significantly. In this chapter, the use of a set of fixed permutations to improve the statistics of the PAR of a PC-OFDM signal is presented. For this technique, interleavers are used to produce K-1 permuted sequences from the same information sequence. The sequence with the lowest PAR, among K sequences is chosen for the transmission. The PAR of a PC-OFDM signal can be further reduced by 3-4 dB by this technique. Mathematical expressions for the complementary cumulative density function (CCDF)of PAR of PC-OFDM signal and interleaved PC-OFDM signal are also presented.
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|Item Type:||Book Chapter|
|Keywords:||PC-OFDM, Peak-to-average power, OFDM|
|Subjects:||Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > COMMUNICATIONS TECHNOLOGIES (100500) > Wireless Communications (100510)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > Schools > School of Engineering Systems
|Deposited On:||30 Jul 2010 11:22|
|Last Modified:||11 Aug 2011 03:48|
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