Closed-loop Phase Synchronization Method and Distributed Communication System Based on Cumulative Positive Feedback

A phase synchronization, positive feedback technology, applied in the field of distributed communication, can solve the problems of speeding up the convergence speed, unable to make full use of the large step size, etc., to achieve the effect of improving the convergence speed

CN105306190BInactive Publication Date: 2018-04-03SHENZHEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-04-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of distributed communication, in particular to a closed-loop phase synchronization method based on cumulative positive feedback and a distributed communication system. The present invention starts from the second time slot, accumulates the number of times that the total strength of the signal received by the target node is greater than the best received signal strength of the current time slot through a positive feedback counter, and when the number of times reaches the preset value, it automatically Increase the step size of the phase disturbance, and increase the value of the preset value, so as to increase the convergence speed at the initial stage of convergence.
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Description

technical field

[0001] The invention relates to the technical field of distributed communication, in particular to a closed-loop phase synchronization method based on cumulative positive feedback and a distributed communication system. Background technique

[0002] Distributed beamforming technology is a cooperative communication technology in which multiple source nodes send information cooperatively so that they can be effectively merged at the target node to achieve the growth of communication range, transmission rate, and energy efficiency. In order to realize the above-mentioned advantages, it is necessary to realize the synchronization of the carrier.

[0003] The existing carrier synchronization algorithms are divided into two categories: one is the closed-loop carrier synchronization algorithm, the target node measures whether the received signal strength meets the system requirements, and continuously feeds back the measurement results to the source node, and the so...

Examples

Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 Shown is a schematic composition diagram of a distributed communication system, which includes several source nodes 2 and target nodes 1 . The system's closed-loop phase synchronization method based on cumulative positive feedback is as follows: figure 2 shown, including the following steps:

[0027] Step A: Each source node 2 transmits with its own transmission phase θ in the first time slot i (1) Simultaneously transmit signals to the target node 1, the target node 1 detects the total signal strength R(1) received in the first time slot, and takes it as the best received signal strength R in the second time slot best (2), and then enter the 2nd time slot. θ i (1) is the transmit phase of the i-th source node 2 in the...