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Signal search and detection method, device, terminal and system

A detection method and detection device technology, applied in transmission systems, digital transmission systems, signaling, etc., can solve the problem of high complexity of signal search and detection, and achieve improved success rate, improved efficiency, and reduced overall complexity. Effect

Active Publication Date: 2021-08-24
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0004] During the implementation process, the inventors found that there are at least the following problems in the traditional technology: the current NB-IoT repeated transmission mechanism has the problem of excessive signal search and detection complexity

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  • Signal search and detection method, device, terminal and system
  • Signal search and detection method, device, terminal and system
  • Signal search and detection method, device, terminal and system

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Embodiment Construction

[0043] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0044] Since the NB-IoT system adopts the retransmission mechanism, the search space for NPDCCH cell search is more and the complexity is higher. Therefore, for NB-IoT terminal access, a simple NPDCCH search and detection method with low computational complexity is needed. In this application, however, by performing CRC decoding processing on the combined signal, and then directly making judgments based on the result of the CRC decoding processing, the complexity of signal search and detection is reduced, the operation is simple, and the efficiency of signal search and det...

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Abstract

The invention relates to a signal search and detection method, device, terminal and system. The method includes: performing CRC decoding processing on the combined signal; the combined signal is obtained by demodulating and soft combining the effective subframe signals satisfying the preset conditions; the effective subframe signal is obtained from the received search space subframe signals, A signal whose signal power is greater than or equal to the power validity threshold; according to the CRC decoding processing result, it is judged whether the search space subframe signal is detected correctly. For the retransmission mechanism, the complexity of signal search and detection is reduced by decoding the CRC of the combined signal and directly based on the result of the CRC decoding process, and the CRC decoding process and judgment are aimed at the combined signal rather than a single search space subframe The signal improves the success rate of signal search and detection; the reduction of comprehensive complexity and the improvement of success rate improve the efficiency of signal search and detection.

Description

technical field [0001] The present application relates to the technical field of mobile broadband communication, in particular to a signal search and detection method, device, terminal and system. Background technique [0002] The Internet of Things is an important part of the new generation of information technology, which is characterized by collaborative connections between things. Communication between things is a necessary condition for realizing collaborative connection between things. Existing 2G (2-Generation wirelesstelephone technology, second-generation mobile phone communication technical specifications) / 3G (3rd-Generation, third-generation mobile communication technology) / 4G (the 4th Generation mobile communication technology, fourth-generation mobile communication technology) Communication protocols cannot meet the requirements of low power, low cost, wide coverage and large capacity. Some other low-power standard protocols such as Lora (Long Range, long-range...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309H04L1/00
CPCH04L1/0026H04L1/0061H04B17/309
Inventor 付杰尉
Owner COMBA TELECOM SYST CHINA LTD
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