Patent
System and method unifying linear and nonlinear precoding for transceiving data
Chiskis Alexander,Reina Guy,Verbin Rami +2 more
- 14 Nov 2019
4
TL;DR: In this article, the authors proposed a method for precoding an information symbol conveying data for transmission between a plurality of transmitters and an unknown number of receivers over a subcarrier frequency.
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Abstract: A method for precoding an information symbol conveying data for transmission between a plurality of transmitters and a plurality of receivers via a plurality of communication channels over a subcarrier frequency, the number of transmitters (N) is different than the number of active receivers (K) for that subcarrier frequency, the method comprising: receiving by said transmitters information pertaining to supportabilities of said receivers to decode non-linearly precoded data; determining a precoding scheme defining for which of said receivers said data to be transmitted by said transmitters shall be precoded using at least one of linear precoding and non-linear precoding, according to said supportabilities; constructing a signal by applying a reversible mapping to said information symbol, said reversible mapping includes elements each respectively associated with a particular one of said receivers, such that those said receivers supporting the decoding of said non-linearly precoded data are capable of reversing said reversible mapping to said information symbol, while for those said receivers not supporting the decoding of said non-linearly precoded data said information symbol is unaffected by said reversible mapping; constructing a precoder characterized by N≠K such that said precoder is configured to perform regularized generalized inversion of a communication channel matrix.
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Citations
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TL;DR: An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers as discussed by the authors, where the encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns.
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TL;DR: In this article, an electronic device used for a wireless communication system, a method, and a storage medium are presented. But the present disclosure relates to an electronic devices used for wireless communication systems, and not to a specific storage medium.
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Apparatus and method for channel estimation in an orthogonal frequency division multiplexing cellular communication system using multiple transmit antennas
Changho Suh,Chan-Soo Hwang,Seok-Hyun F Seokwang Bldg. Yoon,Cho Young Kwon +3 more
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