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Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing

A decoding and spherical decoding technology, applied in the baseband system, multi-frequency code system, baseband system components, etc., can solve the problems of a large number of storage resources, increased decoding complexity, and impracticality, and achieve good decoding performance, reducing decoding complexity, and simplifying the decoding process

Active Publication Date: 2021-10-26
中广(舟山)有线信息网络有限公司
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Problems solved by technology

[0025] The present application provides a decoding method and device based on overlapping multiplexing, as well as a modulation and demodulation method and system, which solves the problem that in traditional decoding methods, for example, when Viterbi decoding is used, although the decoding performance is better, it requires a large number of For storage resources (path storage and distance storage), the decoding complexity increases exponentially with the number of overlapping multiplexing K, and improving the decoding rate is contradictory to spectral efficiency, which cannot be practical. It can be improved on the premise of ensuring spectral efficiency. decoding rate

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  • Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing
  • Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing
  • Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing

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Embodiment 1

[0075] Please refer to Figure 7 , the present embodiment provides a decoding method based on overlapping multiplexing, comprising the following steps:

[0076] Step 1.1: Obtain a digital signal carrying input information. The receiving end obtains the digital signal carrying the input information according to the complex modulation envelope waveform. The complex modulation envelope waveform is the waveform that carries the original signal obtained during the modulation process, which is transmitted at the modulation end and received by the demodulation end.

[0077] Step 1.2: Based on the sphere decoding algorithm, the digital signal is decoded in the corresponding domain to obtain the optimal decoding path; specifically, it includes: setting a search radius in advance, searching circularly for the grid points in the sphere, and continuously reducing the search radius until Find the most probable sending sequence. Wherein, the corresponding domain includes time domain, air...

Embodiment 2

[0128] Please refer to Figure 11 , this embodiment provides a decoding device based on overlapping multiplexing, including an acquisition module 701 and a decoding module 703 .

[0129] The obtaining module 701 is used for obtaining digital signals carrying input information. The receiving end obtains the digital signal carrying the input information according to the complex modulation envelope waveform. The complex modulation envelope waveform is the waveform that carries the original signal obtained during the modulation process, which is transmitted at the modulation end and received by the demodulation end.

[0130] The decoding module 703 is used to decode the digital signal in the corresponding field based on the sphere decoding algorithm to obtain an optimal decoding path for decision output. Wherein, the corresponding domain includes time domain, air domain, frequency domain, code domain, mixed domain, etc., which are determined by the domain adopted in the overlapp...

Embodiment 3

[0182] This embodiment provides a modulation and demodulation method based on overlapping multiplexing, including a modulation step and a demodulation step. In this embodiment, the modulation and demodulation based on overlapping time division multiplexing is mainly used for illustration.

[0183] Such as Figure 12 As shown, the modulation step includes the following sub-steps:

[0184] Step 2.1: Generate an initial envelope waveform h(t) in the time domain according to the design parameters.

[0185] When generating the initial envelope waveform, the design parameters can be input by the user to realize flexible configuration according to the system performance index in the actual system.

[0186] In some embodiments, the design parameters include the window length L of the initial envelope waveform when the sidelobe attenuation of the initial envelope waveform has been determined, eg, when the initial envelope waveform is a Bartlett envelope waveform.

[0187] In some em...

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Abstract

A decoding method and device based on overlapping multiplexing, and a modulation and demodulation method and system, based on a sphere decoding algorithm, a digital signal carrying input information is decoded in a corresponding field to obtain an optimal decoding path for judgment output. Decoding based on the sphere decoding algorithm simplifies the decoding process, saves system resources, reduces the complexity of decoding, improves the real-time performance of the decoding output and ensures the performance of the system. Therefore, it is realized that the decoding complexity is lower as the number of times of overlapping multiplexing increases. At the same time, on the premise of ensuring better decoding performance, the decoding method with a large number of overlapping multiplexing times can be put into practical use.

Description

technical field [0001] The present application relates to the communication field, in particular to a decoding method and device based on overlapping multiplexing, and a modulation and demodulation method and system. Background technique [0002] The modulation and demodulation technology based on overlapping multiplexing (OvXDM: Overlapped X Division Multiplexing) includes a variety of specific implementation schemes, such as the modulation and demodulation technology based on overlapping time division multiplexing (OvTDM: Overlapped Time Division Multiplexing), and the modulation and demodulation technology based on overlapping frequency division multiplexing ( OvFDM: Overlapped Frequency Division Multiplexing) modulation and demodulation technology, Overlapped Code Division Multiplexing (OvCDM: Overlapped Code Division Multiplexing) modulation and demodulation technology, Overlapped Space Division Multiplexing (OvSDM: Overlapped Space Division Multiplexing) modulation and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L25/03
CPCH04L1/0047H04L1/0052H04L25/03242H04L1/00H04L25/03H04L27/26
Inventor 不公告发明人
Owner 中广(舟山)有线信息网络有限公司
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