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Hierarchical k-best spherical decoding method and device

A spherical decoding, single-carrier technology, applied in transmitter/receiver shaping network, baseband system, digital transmission system, etc., can solve high bit error rate, high demodulation complexity, limited space modulation technology Application and other issues

Active Publication Date: 2019-07-05
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the existing methods have problems such as high bit error rate and high computational complexity.
The loss of bit error performance at the receiving end reduces the reliability of system communication, and the high demodulation complexity limits the application of spatial modulation technology in practical systems and massive MIMO systems

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  • Hierarchical k-best spherical decoding method and device
  • Hierarchical k-best spherical decoding method and device
  • Hierarchical k-best spherical decoding method and device

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Embodiment Construction

[0098] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0099] like figure 1 A layered k-best sphere decoding method is shown. The method is a signal demodulation method at a communication receiving end, which is implemented under a single-carrier large-scale spatial modulation system, and is mainly applied to the uplink of wireless communication to realize soft demodulation of a single-carrier large-scale spatial modulation signal at the receiving end.

[0100] Combine below figure 1 , specifically explain the flow steps of a layered k-best sphere decoding method disclosed in this embodiment.

[0101] S0, input the original data, initiali...

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Abstract

The invention discloses a hierarchical k-best spherical decoding method and device. The method comprises the following steps: S0, inputting original data; s1, eliminating inter-block interference; s2,applying matched filtering and noise whitening to the signal after inter-block interference elimination; s3.1, estimating the prior condition probability of the current search path; s3.2, updating amapping value of the path; s4, updating the metric value of the legal path; s5, replacing the data in the storage unit; s6, performing detecting; s7, performing detecting; s8, correcting the metric value of the path; s9, outputting a result. The device comprises an interference elimination module, an online legality inspection module, a metric updating module, a cyclic detection module, a metric correction module, a soft demodulation output module and the like. Based on a width-first strategy in spherical decoding, the search space is greatly reduced, the calculation complexity is greatly reduced, and illegal nodes are effectively eliminated, so that the bit error rate is reduced, and the error code diffusion is inhibited.

Description

technical field [0001] The invention relates to the technical field of digital wireless communication, in particular to a layered k-best spherical decoding method and device. Background technique [0002] Spatial modulation technology has attracted extensive attention from academia and industry because of its higher data transmission efficiency, higher spectral efficiency and lower power loss. The spatial modulation technology transmits additional bit information by controlling the activation state of the transmitting antenna, thereby improving communication efficiency without increasing wireless communication resources. On the other hand, OFDM technology, as one of the key technologies of the 4G communication system, is widely used in various communication protocols and scenarios. Unfortunately, OFDM technology has a problem of high peak-to-average ratio. The single-carrier system can solve the peak-to-average ratio problem very well, and it is a feasible solution to appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03242
Inventor 林少娥郑倍雄温淼文陈芳炯季飞余华
Owner SOUTH CHINA UNIV OF TECH
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