Title:
送信方法、送信機、受信方法、及び受信機
Document Type and Number:
Japanese Patent JP5753306
Kind Code:
B2
Abstract:
The present invention relates to improving the time and frequency diversity for rotated QAM constellations when used with and without time-frequency slicing, as well as to corresponding methods, transmitters, and receivers. Specifically, the present invention provides a component interleaver that ensures that components of a constellation block are mapped to different RF channels. This is achieved by writing real and imaginary components of the rotated constellations independently of each other column-by-column into a matrix with N R rows, applying a cyclic shift to each column of the matrix holding the imaginary components, and reading the real and imaginary components row-by-row. The cyclic shifts are selected for each column in accordance with a shift pattern that contains only integers that are not a multiple of N R . Optimum spreading of the components over time can be achieved by configuring the shift pattern such that the average shift equals N R /2. The sequence of components read from the matrix may then be divided into slices, each of which may then be transmitted through a corresponding RF channel. The present invention also provides a component interleaver for D-dimensional rotated constellations that provides an even spreading of the components of each constellation over the FEC block by setting N R =D and shifting each column of the matrix holding the imaginary components by D/2 components.
Inventors:
Petrov Mikhail
Application Number:
JP2014205691A
Publication Date:
July 22, 2015
Filing Date:
October 06, 2014
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H04J11/00; H03M13/27; H04L27/00; H04L27/34
Domestic Patent References:
| JP5631505B2 |
Foreign References:
| EP2063538A1 |
Other References:
DVB Document A160,2012年11月,pp.29-34,53-77,295
Junho Kim et al.,New Constellation-Rotation Diversity Scheme for DVB-NGH,Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 IEEE 72nd,2010年 9月 9日
Junko Kim et al.,New 4-dimensional constellation-rotation modulation method for DVB-NGH,Consumer Electronics (ICCE), 2011 IEEE International Conference on,2011年 1月12日,pp.395,396
David Vargas et al.,Combined Time, Frequency and Space Diversity in DVB-NGH,Broadcasting, IEEE Transactions on,2013年12月,Vol.59, No.4,pp.674-684
Junho Kim et al.,New Constellation-Rotation Diversity Scheme for DVB-NGH,Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 IEEE 72nd,2010年 9月 9日
Junko Kim et al.,New 4-dimensional constellation-rotation modulation method for DVB-NGH,Consumer Electronics (ICCE), 2011 IEEE International Conference on,2011年 1月12日,pp.395,396
David Vargas et al.,Combined Time, Frequency and Space Diversity in DVB-NGH,Broadcasting, IEEE Transactions on,2013年12月,Vol.59, No.4,pp.674-684
Attorney, Agent or Firm:
Patent business corporation Nakajima intellectual property integrated office
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