Title:
PEAK POWER REDUCTION DEVICE IN COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/010196
Kind Code:
A1
Abstract:
Problem: To provide a peak power reduction device designed to achieve peak reduction in eigenmode MIMO transmission without entailing a reduction in the eigenvalue and bit error rate of a stream to be transmitted. Solution: This peak power reduction device is characterized by being provided with: a means for dividing digital information to be transmitted into a plurality of streams; a means for selecting the modulation level of the plurality of streams and the distribution of transmission power according to a transmission state; a means for performing singular value decomposition on the transmission path characteristic of a stream and precoding the resultant data by a right singular value matrix; a means for performing complex mapping on the subcarrier of a stream in accordance with the modulation level; a means for converting a complex mapping signal into a time domain signal; a first means for storing the conversion result as a time domain signal; and a second means for calculating a peak time signal exceeding a previously set prescribed threshold value from a peak value, if any exists, that exceeds a prescribed threshold value for the amplitude of the time domain signal.
Inventors:
NAKADA TATSUHIRO (JP)
KATO HIROKI (JP)
ITO KEI (JP)
EJIMA SATORU (JP)
KATO HIROKI (JP)
ITO KEI (JP)
EJIMA SATORU (JP)
Application Number:
PCT/JP2016/066914
Publication Date:
January 19, 2017
Filing Date:
June 07, 2016
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC (JP)
International Classes:
H04J99/00; H04B7/04; H04J11/00
Foreign References:
| JP2011166725A | 2011-08-25 | |||
| JP2014241510A | 2014-12-25 |
Other References:
SHOKI INOUE ET AL.: "Throughput Performance of CF-Based Adaptive PAPR Reduction Method for Eigenmode MIMO-OFDM Signals Using AMC with QAM Modulation and Turbo Coding", IEICE TECHNICAL REPORT, vol. 111, no. 94, 16 June 2011 (2011-06-16), pages 197 - 202
YOHEI ONUKI ET AL.: "Effect of PAPR reduction method with peak canceling signal allocation for Eigenmode MIMO-OFDM systems", IEICE TECHNICAL REPORT, vol. 114, no. 235, 26 September 2014 (2014-09-26), pages 1 - 5
YOHEI ONUKI ET AL.: "Effect of PAPR reduction method with peak canceling signal allocation for Eigenmode MIMO-OFDM systems", IEICE TECHNICAL REPORT, vol. 114, no. 235, 26 September 2014 (2014-09-26), pages 1 - 5
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