Coding method for mixed recursion lattice space-time code

A space-time coding and grid technology, applied in the field of space-time coding, to achieve the effect of improving coding gain and anti-fading performance, and improving the overall product distance

Inactive Publication Date: 2004-12-15
XIDIAN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defective of existing method, provide a kind of hybrid recursive trellis space-time code coding method applicable to serial cascaded system, when guaranteeing that serial cascaded space-time coding system (SCSTC) complexity is constant In the case of , the anti-fading performance of the system can be further improved

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  • Coding method for mixed recursion lattice space-time code
  • Coding method for mixed recursion lattice space-time code
  • Coding method for mixed recursion lattice space-time code

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Embodiment Construction

[0040] refer to figure 1 , the serial cascaded lattice space-time coding system of the present invention includes: a transmitting unit 10 and a receiving unit 11 . Wherein, the transmitting unit 10 includes an outer code encoder 100 and an inner code encoder 102 ; the receiving unit 11 includes an outer code decoder 112 and an inner code decoder 110 . The inner code encoder 102 uses the hybrid recursive trellis space-time code (HSR-STTC) as the inner code to perform space-time encoding, and correspondingly, the inner code decoder 110 also uses the hybrid recursive trellis space-time code as the inner code to perform space-time encoding. decoding. Furthermore, the outer code encoder 100 is a low density check code (LDPC) encoder, and the outer code decoder 112 is a low density check code (LDPC) decoder. The working process of the system is as follows: at the sending end, through the sending unit, the information sequence t is subjected to outer code encoding and interleaving...

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Abstract

This invention relates to a hybrid recursive lattice empty time coding method used in serial cascade empty time coding system based on different modulation modes such as phase shift key control modulation, 8 phase shift key control modulation, 16 carry orthogonal amplitude modulation and other 2n one stage. The coding includes selection of component code and determination of image mode that is to determine the modulation mode according to the required transmission rate and state number of coding to further determine the state number code rate and coding mode of the component code appling 1 / 2 rate two state system recursive convolutional codes which number equals to the required transmission rate value, the coding mode is a first class system code, the image mode includes image of different transmitted symbols and different positions, that is to image the information bit output by every component code and check bit to different positions of different symbols.

Description

Technical field: [0001] The invention relates to a space-time coding technique, in particular to a coding method of a hybrid recursive lattice space-time code, which can be used to improve the performance of a serial cascade system. Background technique: [0002] In the increasingly popular third-generation mobile communication system research, there is a very important research content, which is how to achieve the highest possible transmission rate under limited bandwidth, and how to use efficient coding methods to effectively resolve the gap between bandwidth and transmission rate. contradictions between. Space-time coding has attracted much attention due to the use of multi-antenna array transmission and reception technology, which can effectively improve the system frequency band utilization. [0003] In the current research, space-time codes are often used in cascade with other error-correcting codes, that is, a serial cascade system is used to complete the space-time ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/00H03M13/23H04Q11/04
Inventor 李颖郭旭东王新梅
Owner XIDIAN UNIV
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