Signal auxiliary channel estimation method in case of sparse active equipment detection

A device detection and auxiliary channel technology, applied in transmission monitoring, baseband system, digital transmission system, etc., can solve the problem of inaccurate detection of active devices, and achieve the effect of reducing impact, low gap and reducing error

Active Publication Date: 2018-11-13
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for signal-assisted channel estimation under sparse active device detection, so as to overcome the shortcomings of inaccurate active device detection in the prior art and reduce active device detection errors, thereby reducing channel estimation errors and their influence on decoding , to more effectively control the error propagation

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  • Signal auxiliary channel estimation method in case of sparse active equipment detection
  • Signal auxiliary channel estimation method in case of sparse active equipment detection
  • Signal auxiliary channel estimation method in case of sparse active equipment detection

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Embodiment 1

[0040] There is a base station containing N devices, and there are N a Active devices send their training sequence and data information at the same time, and these information will be sent to the data processing module of the base station for analysis. The base station will determine which devices are active and how many are active through the BOMP algorithm, and further obtain the channels of active devices status and data to be transferred.

[0041] This embodiment is the operation process of the signal-assisted channel estimation method under the detection of sparse active devices, and the specific steps are as follows:

[0042] In the first step, the active devices used send their training sequence and signal data at the same time, then the base station can obtain the corresponding measurement data, h n ∈C M×1 Represents the channel response of the nth device, each element obeys the mean value of 0 and the variance is σ 2 The complex Gaussian distribution of all equipme...

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Abstract

The invention discloses a signal auxiliary channel estimation method in a case of sparse active equipment detection, which is characterized by comprising the steps that: firstly, all active equipmentsimultaneously sends training sequences and signals of the active equipment; according to the training sequences sent by the active equipment, estimating an active equipment set and channel information by a block orthogonal matching tracking algorithm; then decoding the data signals sent by the equipment by utilizing the obtained channel state information; carrying out channel estimation again byusing the decoded signals as the training sequences; and carrying out decoding again by utilizing the updated channel information. By adopting the method disclosed by the invention, part of equipmentwith faults in decoding originally can also correctly decode, and a more accurate number of the active equipment can be obtained; and for a mode with sparse active equipment detection, by adopting themethod disclosed by the invention, influence of a channel estimation error on decoding can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of active device detection and channel estimation methods in the communication field of large-scale connections, and in particular relates to a signal-assisted channel estimation method under sparse active device detection. Background technique [0002] According to the Institute of Electrical and Electronics Engineers (IEEE) "Journal of Communications" (64.11 (2016): 4680-4694), at present, the explosive growth of 5G devices and devices is gradually exceeding the limits of interference-limited cellular systems. Capacity, using the traditional MAC protocol to estimate the channel of each device will be very inefficient; exploring the sparse active devices in the uplink can effectively reduce the complex signaling overhead, but this work needs to estimate the CSI of all devices, which requires a long symbol time The training sequence used to send the device will result in insufficient time for decoding; using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391H04L1/00H04L25/02
CPCH04B17/391H04L1/0061H04L25/0224H04L25/0242
Inventor 张昆尹华锐陈晓辉卫国
Owner UNIV OF SCI & TECH OF CHINA
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