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An iterative detection method and system for wireless communication

An iterative detection and wireless communication technology, applied in the field of iterative detection methods and systems for wireless communication, can solve problems such as the need to enhance detection performance, and achieve the effects of high practicability, improved demodulation performance, and improved reliability

Active Publication Date: 2020-08-04
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

However, the detection performance of MMSE-SIC technology for iterative detection needs to be enhanced

Method used

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  • An iterative detection method and system for wireless communication
  • An iterative detection method and system for wireless communication
  • An iterative detection method and system for wireless communication

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Embodiment Construction

[0050] Such as figure 1 As shown, the iterative detection method for wireless communication provided by the present invention includes the following steps:

[0051] Use the QRM algorithm to demodulate the received signal for the first time, descramble and decode the demodulated signal. During the decoding process, calculate the symbol mean and symbol variance according to the soft bits before the hard judgment of the decoder , as prior information;

[0052] Calculate the symbol estimate value according to the prior information, use the MMSE demodulation algorithm to calculate the bit soft value of the symbol estimate value, descramble the data after the bit soft value calculation, and complete the decoding;

[0053] Or: perform the second QRM soft value calculation according to the prior information and the node selection result of the first demodulation, descramble the data after the soft value calculation, and complete the decoding.

[0054] As an implementable mode, the Q...

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Abstract

The invention discloses an iterative detection method and system of wireless communication. The method comprises the following steps: performing first time demodulation on a received signal by using aQRM algorithm, descrambling and decoding the demodulated signal, and calculating a symbol mean and a sign variance according to soft bits before the hard decision of the decoder in a decoding processto serve as priori information; calculating a symbol estimated value according to the priori information, and calculating a bit soft value on the symbol estimated value by using an MMSE demodulationalgorithm, performing descrambling on the calculated data, and completing decoding; performing second time QRM soft value calculation according to the priori information and a node selection result ofthe first time demodulation, descrambling the data after the soft value calculation, and completing decoding. By adoption of the system and method, the demodulation performance is enhanced, the throughput of the user is improved, the reliability and real-time performance of the measurement signal and the control signal are improved, and the practicability is high.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an iterative detection method and system for wireless communication. Background technique [0002] In recent years, due to the rapid development of communication technology, computer technology, signal processing technology, and network technology, a comprehensive technological change has taken place in the field of industrial wireless communication. Features and trends. There are many differences between industrial wireless communication and wireless cellular communication. In terms of system indicators, it requires strong anti-interference ability, high reliability, low delay, low power consumption, and high security. These indicators are more sophisticated than wireless cellular communication. [0003] The market space in the field of industrial wireless communication is extremely broad, because the transmission of measurement and control signals in many factories is sti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/005
Inventor 吴江徐伟强史清江吴呈瑜占敖
Owner ZHEJIANG SCI-TECH UNIV
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