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Signal selection and combining method of adaptive decoding transmission cooperation system

A technology of decoding and forwarding, cooperative system, applied in the direction of diversity/multi-antenna system, space transmit diversity, etc., can solve the problem that the selective combiner cannot effectively combine the signals of different modulation orders.

Inactive Publication Date: 2015-04-15
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the existing selection combiner cannot effectively combine signals of different modulation orders, and provides a signal selection and combination method for an adaptive decoding and forwarding cooperative system

Method used

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  • Signal selection and combining method of adaptive decoding transmission cooperation system
  • Signal selection and combining method of adaptive decoding transmission cooperation system
  • Signal selection and combining method of adaptive decoding transmission cooperation system

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Experimental program
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specific Embodiment approach 1

[0034] Specific implementation mode 1: A signal selection and merging method of an adaptive decoding and forwarding cooperation system in this implementation mode is implemented according to the following steps:

[0035] 1. The input of each branch signal:

[0036] The decoding and forwarding cooperation system includes the destination node D, the source node S and N relay nodes R participating in the cooperation, and the signal passes through the S-D branch or S-R i - D branches for transmission, where i=1...N;

[0037] Second, the solution of the optimal proportionality coefficient:

[0038] An approximation of the average bit error rate for the selected combiner based on the scaling factor is

[0039] P Ray ( N + 1 ) ≈ ( γ ‾ ...

specific Embodiment approach 2

[0139] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step two formula (1) Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0140] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the minimum Euclidean distance between the constellation points in the step two formula (1) Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

Provided is a signal selection combining method of an adaptive decoding transmission cooperation system. The invention relates to a diversity reception method of a communication system, in particular to a diversity signal selection combining method of the adaptive decoding transmission cooperation system. The signal selection combining method of the adaptive decoding transmission cooperation system solves the problem that the existing selection combiner can not effectively combine signals with different modulation orders. The method includes the steps: first, inputting each branch signal; second, solving the optimal proportionality coefficient; and third, selecting and outputting a selection combiner signal based on the proportionality coefficient. Then the output of the selection combiner signal of the adaptive decoding transmission cooperation system is achieved. The signal selection merging method of the adaptive decoding transmission cooperation system is applied to the communication field.

Description

technical field [0001] The invention relates to a diversity reception method of a communication system, in particular to a diversity signal selection and combination method of an adaptive decoding and forwarding cooperation system. Background technique [0002] Cooperative communication not only expands the coverage of the network by using relay transmission, but also forms a virtual multi-antenna system to obtain space diversity gain. Adaptive modulation technology is used to select high-order modulation with higher spectral efficiency to send signals when channel conditions are good, which can effectively improve the spectral efficiency of the cooperative system. For the decode-and-forward cooperative system, since the relay can digitally process the signal, the relay can autonomously select a different modulation method from the source node according to the channel state information, thereby maximizing the spectrum efficiency. [0003] In addition, in order to ensure tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08
Inventor 赵洪林赵大伟马永奎张佳岩李涛贾敏
Owner HARBIN INST OF TECH
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