Distributed MIMO system and channel estimation method

A channel estimation, multi-input technology, applied in diversity/multi-antenna systems, transmission systems, multi-frequency code systems, etc., can solve the problem of not giving distributed MIMO system channel estimation methods, etc., to improve data transmission efficiency, good compatibility

Inactive Publication Date: 2007-05-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA +1
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Problems solved by technology

[0052] In summary, the existing coherent detection algorithms for distributed MIMO systems all assume that the channel fading factor is known at the receiving end, but they do not give a method for channel estimation in distributed MIMO systems

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  • Distributed MIMO system and channel estimation method
  • Distributed MIMO system and channel estimation method
  • Distributed MIMO system and channel estimation method

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Embodiment Construction

[0101] Please refer to Fig. 6, which is a distributed multiple-input multiple-output (MIMO) system disclosed by the present invention, the system includes two parts, a transmitting end and a receiving end, and the transmitting data b is under the single-path Rayleigh fading channel condition, Using the auxiliary method of the pilot sequence, the transmitting end transmits the output with the data frame radio frequency, and the receiving end receives the data frame and obtains the pilot sequence from it, and inserts the pilot into the transmitted data according to the sequence to obtain channel estimates for the distributed MIMO system.

[0102] The transmitter includes:

[0103] Distributed multiple-input multiple-output (MIMO) coding module 210, adopts layered space-time coding technology (such as V-BLAST) in the MIMO system, this distributed MIMO coding module 210 is used for encoding the input transmission data b into M( M is a positive integer) road parallel data streams,...

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Abstract

The invention relates to a distribution multi-input multi-output (MIMO) system and relative channel evaluate method, wherein said system comprises sender and receiver; the sender comprises distribution MIMO code module, and multiply parallel sending circuits for inserting pilot sequence and adding protective distance into dataflow output from coding module, to form and send data frame; the receiver comprises multiply parallel receiving circuits for receiving the data frame, obtaining the pilot sequence and data section from the data frame; the pilot mark module for outputting the number of sending circuit and the pilot sequence at preset length; channel evaluating module for obtaining channel evaluating matrix via the pilot sequence of receiving circuit and the pilot sequence of pilot mark module. The invention can process channel evaluation of distribution MIMO system.

Description

technical field [0001] The invention relates to the technical field of data processing in wireless communication, in particular to a distributed multiple-input multiple-output system and a channel estimation method. Background technique [0002] In recent years, a distributed antenna system (Distributed Antenna System, DAS for short), as a new trend of future public wireless network access, has received more and more attention. As shown in Figure 1, the distributed antenna system is a communication communication system that connects antenna groups (a plurality of antennas 100 connected to a base station 120) located in different geographic locations to a mobile station (central signal processor) 130 through optical fibers or cables. system. Due to the distribution of antennas in different geographical locations, the distributed antenna system can provide macro-diversity, achieve higher system capacity, effectively shorten the access distance of signals, reduce the power req...

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Application Information

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IPC IPC(8): H04L27/26H04L12/26H04B7/08H04B7/06
Inventor 孔婷唐友喜邵士海李杰
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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