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A hybrid transmission code detection method and device

A code detection and code group technology, which is applied in the field of mixed transmission code detection, can solve the problems of complex implementation and large amount of matrix calculation, and achieve the effect of reducing complexity, reducing the number of iterations, and reducing the number of calculations

Active Publication Date: 2019-09-10
ALLWINNER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The technical problem to be solved by the present invention is to provide a mixed transmission code detection method and device for the deficiencies of the prior art, which overcomes the disadvantages of the ZF / MMSE-SIC detection detection method of the prior art with a huge amount of matrix calculation and complex implementation

Method used

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  • A hybrid transmission code detection method and device
  • A hybrid transmission code detection method and device
  • A hybrid transmission code detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Assuming that the channel is a flat Rayleigh fading channel, the sender transmits two Almonti 2x1 STBC mixed modulated signals. The received signal is expressed as:

[0064]

[0065] Among them, the first subscript of h is the serial number of the receiving antenna, and the second subscript is the serial number of the transmitting antenna. Through the transformation of the equation, we can get:

[0066]

[0067] Then, the channel matrix and the sending vector are divided into blocks, wherein the fading coefficient h corresponding to the transmitting antenna of the same STBC coding group is divided into the same fading coefficient block, and the corresponding sending symbols of the same STBC coding group are divided into the same STBC sending symbol block; is to transmit two Almonti 2x1 STBC mixed signals, so the four symbols sent can be divided into S 1 and S 2 Two pieces, namely:

[0068]

[0069] The channel matrix is ​​divided into H 1 and H 2 Two piece...

Embodiment 2

[0129] Assuming that the channel is a flat Rayleigh fading channel, the sender transmits a modulated signal mixed with an Almonti 2x1 STBC and an SDM (spatial division multiplexing, space division multiplexing). The received signal is expressed as:

[0130]

[0131] Among them, the first subscript of h is the serial number of the receiving antenna, and the second subscript is the serial number of the transmitting antenna. Through the transformation of the equation, we can get:

[0132]

[0133] Then, the channel matrix and transmission vector are divided into blocks, wherein the fading coefficient h corresponding to the transmitting antenna of the same STBC coding group is divided into the same fading coefficient block, and the fading coefficient h corresponding to the transmitting antenna of the same SDM coding group is divided into the same fading coefficient block , the transmission symbols corresponding to the same STBC coding group are divided into the same STBC tra...

Embodiment 3

[0192] Assuming that the channel is a flat Rayleigh fading channel, the sender transmits a modulated signal mixed with an Almonti 2x1 STBC and two SDMs (spatial division multiplexing, space division multiplexing). The received signal is expressed as::

[0193]

[0194] Through the transformation of the equation, we can get:

[0195]

[0196] Then, the channel matrix and transmission vector are divided into blocks, wherein the fading coefficient h corresponding to the transmitting antenna of the same STBC coding group is divided into the same fading coefficient block, and the fading coefficient h corresponding to the transmitting antenna of the same SDM coding group is divided into the same fading coefficient In the block, the transmission symbols corresponding to the same STBC coding group are divided into the same STBC transmission symbol block, and the transmission symbols corresponding to the same SDM coding group are divided into the same SDM transmission symbol bloc...

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Abstract

The invention discloses a method and device for detecting hybrid sending codes. The method comprises the following steps: hybrid sending at least two orthogonal STBC encoding group signals by a specified antenna, or hybrid sending at least one orthogonal STBC encoding group signal and at least one space division multiplexing SDM encoding group signal by the specified antenna; blocking elements of a channel matrix and the elements of a sending vector S, wherein a fading coefficient h corresponding to the same STBC encoding group transmitting antenna or the fading coefficient h corresponding to the same SDM encoding group transmitting antenna is divided in the same fading coefficient block, and a sending symbol s corresponding to the same STBC encoding group or the sending symbol s corresponding to the same SDM encoding group are divided in the same sending symbol block; and detecting the sending symbols according to blocks. According to the method and device disclosed by the invention, the elements of the channel matrix H and the elements of the sending vector S are blocked, the entire detection process is handled according to the blocks, thereby reducing the iterations, reducing the matrix calculation times, keeping the excellent performance of Symbol-ZF / MMSE-SIC detection, and reducing the implementation complexity.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for detecting mixed transmission codes. Background technique [0002] Through the use of spatial multiplexing technology on MIMO, the communication throughput is greatly improved. In addition to being affected by white noise, each transmitted symbol in the receiving vector also interferes with each other, so a detector is required at the receiving end for descrambling. [0003] Assuming that the spatially multiplexed signal passes through a flat Rayleigh fading channel, the received signal is expressed as: [0004] R=H·S+N (1) [0005] In equation (1): [0006] (1) H represents the channel matrix and is expressed as: [0007] [0008] Among them, Nt and Nr represent the number of transmitting antennas and receiving antennas, respectively. [0009] (2) S represents the sending vector and is expressed as: [0010] [0011] Among...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413
Inventor 朱嘉俊
Owner ALLWINNER TECH CO LTD