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Sphere decoding method applied to multi-input multi-output channel

A decoding method and multi-output technology, applied in transmission systems, digital transmission systems, and shaping networks in transmitters/receivers, etc., can solve problems such as increased energy consumption, decreased data processing capacity, and larger chip processor area.

Active Publication Date: 2010-06-16
REALTEK SEMICON CORP
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Problems solved by technology

However, when the fading of the MIMO channel is serious or the orthogonal features are insufficient, for high-order MIMO systems, the K value must be increased to improve the signal reception performance of the system
In this way, the complexity of the system will increase sharply in the proportion of (T-2)M, which will increase the area of ​​the chip processor, increase energy consumption and reduce the amount of data processing.

Method used

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  • Sphere decoding method applied to multi-input multi-output channel
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  • Sphere decoding method applied to multi-input multi-output channel

Examples

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no. 1 example

[0026] The sphere decoding method applied to the MIMO channel of the present embodiment is applied in multiple domains, and includes the following steps: a. receiving T signals transmitted via the MIMO channel, where T is a positive integer, and the MIMO channel is characterized by a channel matrix ; b. Generate a triangular matrix corresponding to the channel matrix, the triangular matrix corresponds to a first estimation layer to a T estimation layer, wherein each estimation layer includes M star points, and M is a positive integer; c . Obtain a first zero-forcing soft-output solution corresponding to the first estimation layer, and obtain a first set based on the SE enumeration method, the first set has a plurality of the first estimation layer The first star-shaped point, take an i-th better point P(1) from the first set, and according to the i-th better point P(1), another first star-shaped point outside the first set The point is included in the first set, i is a positiv...

no. 2 example

[0061] The sphere decoding method applied to the MIMO channel of the present embodiment includes the following steps: a. receiving T signals transmitted via the MIMO channel, T is a positive integer, and the MIMO channel is characterized by a channel matrix; b. The channel matrix is ​​represented by A real number form is expanded and a corresponding triangular matrix is ​​generated, and the triangular matrix corresponds to a first estimation layer to a 2T estimation layer, wherein each estimation layer includes M star points, and M is a positive integer; c. Obtain a first soft output solution corresponding to the first estimation layer, and based on the SE enumeration method, obtain K better points P (1) of the first estimation layer, K is a positive integer; d. According to The K better points P(n-1) of the (n-1)th estimation layer are obtained corresponding to the Kth nth zero-forcing soft output solutions of an nth estimation layer, and a first-th n sets, the nth set has a ...

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Abstract

The invention discloses a sphere decoding method applied to a multi-input multi-output (MIMO) channel, which comprises the following steps: arranging a plurality of starlike points of an nth estimation layer by an enumeration method and according to the nth estimation layer corresponding to a matrix of the MIMO channel, and defining at least one nth subset of the nth estimation layer; taking a starlike point with the minimum part of Euclidean distance (PED) serving as a better point out from a nth subset according to the PED; selecting another starlike point of the nth estimation layer except the nth subset according to the better point, and replacing the better point with the another starlike point serving as one member of the nth subset; if other better points need to be found, repeating the second step according to the minimum PED and updating the nth subset; and determining an optimal solution according to Kn better points of the nth estimation layer.

Description

technical field [0001] The invention relates to a sphere decoding method applied to multiple-input multiple-output channels, and in particular to a sphere decoding method applied to multiple-input multiple-output channels that can reduce system complexity. Background technique [0002] With the development of wireless communication technology, the specification of wireless area network has evolved from 802.11a / b / g of single-input single-output (SISO) mode to multi-input multi-output (multi-input multi-output, MIMO) mode of 802.11n to meet higher speed data transmission requirements. MIMO technology uses multiple transmit antennas and multiple receive antennas to transmit and receive signals, respectively. Compared with the traditional SISO system, the MIMO system can simultaneously provide multiple parallel data streams under the same frequency band at the same time, thereby providing multiple data transmission capacity. [0003] MIMO systems must efficiently utilize spati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04L25/03
Inventor 陈彦志郑璁骏柳德政
Owner REALTEK SEMICON CORP
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