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Relay method and relay device

A relay device and a technology for receiving signals, applied in the directions of broadcast service distribution, orthogonal multiplexing systems, multiplexing communication, etc., can solve the deterioration of the precoding method, the reception quality is not described, and the reception quality deterioration is not described problems such as application methods to achieve the effect of improving reception quality and improving reception quality degradation

Active Publication Date: 2014-01-08
SUN PATENT TRUST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this document, it is described that the matrix used for precoding is a unitary matrix and that the unitary matrix is ​​randomly switched, but there is no description of the application method against the deterioration of reception quality in the LOS environment shown above, and only a brief description random switching
Of course, there is no description about the precoding method for improving the reception quality deterioration in the LOS environment and the configuration method of the precoding matrix.

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  • Relay method and relay device
  • Relay method and relay device
  • Relay method and relay device

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0205] The transmission method, transmission device, reception method, and reception device of this embodiment will be described in detail.

[0206] Before proceeding to this description, an overview of a transmission method and a decoding method of a spatial multiplexing MIMO transmission system, which is a conventional system, will be described.

[0207] figure 1 means N t ×N r Architecture of spatially multiplexed MIMO systems. The information vector z is coded and interleaved. And, get the vector u=(u 1 ,...,u Nt ) as the interleaved output. Among them, u i =(u i1 ,...,U iM ) (M: number of transmitted bits per symbol). If the sending vector s=(s 1 ,...,s Nt ) T , then the transmitted signal from transmitting antenna #i is denoted as s i =map(u i ), which normalizes the transmitted energy, which can be expressed as E{|s i | 2}=Es / Nt(E s : total energy per symbol). And, if the receiving vector is set as y=(y 1 ,...,y Nr ) T , it can be expressed as the...

Embodiment approach 2

[0443] In Embodiment 1, it is described as Figure 6 The situation where the precoding weights are regularly switched is shown, and in this embodiment, the description is related to Figure 6 Different specific precoding weight design methods for different precoding weights.

[0444] exist Figure 6 The method of switching the precoding weights of Equation (37) to Equation (40) is described in . When this is generalized, the precoding weights can be changed as follows. (However, assuming that the switching period of the precoding weight is 4, the same description as Equation (37) to Equation (40) is performed.)

[0445] When the symbol number is 4i (i is an integer greater than or equal to 0):

[0446] [Formula 42]

[0447] ...Formula (42)

[0448] Among them, j is the imaginary unit.

[0449] When the symbol number is 4i+1:

[0450] [Formula 43]

[0451] ...Formula (43)

[0452] When the symbol number is 4i+2:

[0453] [Formula 44]

[0454] ...Formula (44) ...

Embodiment approach 3

[0672] In Embodiment 1 and Embodiment 2, regarding the method of regularly switching the precoding weights, the case where the amplitudes of the elements of the precoding weight matrix are equal is described, but in this embodiment, an example that does not satisfy this condition is described. .

[0673] In contrast to Embodiment 2, a case where precoding weights are changed in N slot cycles will be described. It can be considered that the following processing is performed on the symbol number in the same manner as in Embodiment 1 and Embodiment 2. Wherein, β is a positive real number, and β≠1.

[0674] When the symbol number is Ni (i is an integer greater than 0):

[0675] [Formula 86]

[0676] ...Formula (82)

[0677] Among them, j is the imaginary unit.

[0678] When the symbol number is Ni+1:

[0679] [Formula 87]

[0680] ...Formula (83)

[0681] ·

[0682] ·

[0683] ·

[0684] When the symbol number is Ni+k (k=0, 1, ..., N-1 (k is an integer ranging from ...

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Abstract

Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas.

Description

technical field [0001] The present invention is based on (1) Japanese patent application 2011-093539, (2) Japanese patent application 2011-102099, (3) Japanese patent application 2011-118453, (4) Japanese patent application 2011-140747, ( 5) Japanese patent application 2011-192123, thus citing the content of these original patent applications. [0002] The present invention relates to a precoding method, a precoding device, a transmission method, a transmission device, a reception method, and a reception device for performing communication using, in particular, multiple antennas. Background technique [0003] In the past, as a communication method using multiple antennas, for example, there was a communication method called MIMO (Multiple-Input Multiple-Output: Multiple-Input Multiple-Output). In multi-antenna communication typified by MIMO, a plurality of sequences of transmission data are individually modulated, and each modulated signal is simultaneously transmitted from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J99/00H04B7/04H04J11/00
CPCH04B7/0413H04L25/0391H04B7/0469H04B7/0456H04L25/03949H04L27/34H04B7/0802H04B7/0604H04L5/0023H04L25/03171H04L27/2614H04L5/0053H04W4/06H04B7/15542H04W40/22
Inventor 村上丰木村知弘大内干博
Owner SUN PATENT TRUST