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Amplification forwarding cooperation treatment based broadband wireless sensing network channel estimation method

A wideband wireless and channel estimation technology, applied in the transmitter/receiver shaping network, baseband system components, transmission system, etc., to achieve strong practicability, low complexity, and high precision

Inactive Publication Date: 2008-03-05
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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Problems solved by technology

The existing technical solutions are only applicable to the cooperative communication situation of a single relay node, but in practical applications, multi-relay node cooperative communication can provide more space diversity gain, making it more common than a single relay node application, therefore, How to solve the problems existing in the existing broadband wireless sensor network with multi-relay node cooperative communication has become a problem to be solved urgently by those skilled in the art

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  • Amplification forwarding cooperation treatment based broadband wireless sensing network channel estimation method
  • Amplification forwarding cooperation treatment based broadband wireless sensing network channel estimation method
  • Amplification forwarding cooperation treatment based broadband wireless sensing network channel estimation method

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Embodiment Construction

[0019] Referring to Fig. 1, the broadband wireless sensor network channel estimation method based on amplification and forwarding cooperative processing of the present invention mainly includes the following steps:

[0020] Step 1: In a wideband wireless sensor network, the transmitting terminal as the source node determines the length of the Chu sequence as the training sequence, and estimates each relay terminal as a relay node in the broadband wireless sensor network and as The noise power of the receiving end of the sink node and the maximum number of non-zero taps to determine the time domain response of the channel between the nodes. In this embodiment, the broadband wireless sensor network can adopt orthogonal frequency division multiplexing technology or single Domain equalization technique against multipath fading for virtual multi-antenna system. In addition, the noise power of each relay end and receiving end and the maximum number of non-zero taps of the channel ti...

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Abstract

The method includes steps: transmitting end (TE) determines length value of Chu sequence as training sequence; estimating out noise power at each relay end and receiving end, and determining maximal number of nonzero tap in time domain response of channel between nodes, and determining power distribution coefficient (PDC) of each node; after determining value of length and PDC, and selecting corresponding Chu sequence and adding circular prefix (CP), TE carries out transmission at first time slot (TS); after receiving signal, each relay end carries out linear processing on the received signal based on PDC and unitary matrix, and then adds CP, and transmits them in second TS; the receiving end receives signals at first TS and second TS, and unites the received signals with CP being removed, further, carries out channel estimation (CE) by minimum mean-square value. Thus, the invention realizes CE in high precision and low complexity in cooperation comm containing multiple relay nodes.

Description

technical field [0001] The invention relates to the field of wireless information transmission, in particular to a channel estimation method of a broadband wireless sensor network based on amplifying and forwarding cooperative processing. Background technique [0002] Multiple-input multiple-output (MIMO) technology refers to the technology that uses multiple antennas at both the transmitting end and the receiving end, which can significantly improve the capacity of the communication system and the quality of the wireless transmission link, so it has become a research in the field of wireless communication. hotspot. However, due to the influence of factors such as the price and volume of the terminal equipment, it is not practical to configure multiple antennas on the nodes of the wireless sensor network. In order to solve this problem, the two concepts of cooperative communication and virtual multi-antenna came into being. [0003] Cooperative communication technology is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L27/26H04L1/06H04L12/28H04B1/707
Inventor 严凯丁盛邱云周姜建朱明华
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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