PAR reduction via constellation shaping
PAR reduction via constellation shaping
复制标题
通过星座整形减少 PAR
DOI:
10.1109/isit.2000.866461
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
D. Jones
中科院分区:
文献类型:
--
作者:
H. Kwok;D. Jones
We introduce a novel scheme using a constellation shaping approach to reduce the peak-to-average ratio (PAR) in orthogonal frequency-division multiplexing (OFDM) systems. In the time domain, the peak power bound traces out a hypercube boundary. We map this square time-domain boundary back to the frequency domain via the DFT and construct a method for indexing the OFDM constellation points. The encoding and decoding of the constellation use generators and relations from group theory. The end result is a coding scheme with nearly 20 dB of PAR reduction with no reduction in data rate or performance.