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Multiuser space hour group coding detection method

A technology of space-time block coding and detection method, which is applied in the direction of preventing/detecting errors through diversity reception, and can solve problems such as poor performance and failure to consider the impact of receiving signal-to-noise ratio demodulation

Inactive Publication Date: 2006-03-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The disadvantage of this method is that the detection sequence is fixed, and the detection is performed from the last user to the first user in turn. Since the influence of the received signal-to-noise ratio on demodulation is not considered, the performance is not good

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  • Multiuser space hour group coding detection method
  • Multiuser space hour group coding detection method
  • Multiuser space hour group coding detection method

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Embodiment Construction

[0075] A specific example of the present invention is as follows, parameter setting does not affect generality, assumes that the data of data source adopts BPSK modulation, the number of users M=4, the number of transmitting antennas is 2M=8, the number of receiving antennas N=4, and the channel is Independent uncorrelated slow fading channel, vehicle speed 5 km / h.

[0076] After the transmitted data is modulated by BPSK, it is serial-to-parallel converted and divided into M signal streams, which are transmitted by the transmitting antenna. After the transmitted signal passes through the spatial channel, it is received by the N receiving antennas at the receiving end. Assuming that the signal vector transmitted by the transmitting antenna for a=(X 1 x 2 x 3 x 4 )', the signal vector received by the receiving antenna is r=(Y 1 Y 2 Y 3 Y 4 )', the Gaussian white noise vector is v=(N 1 N 2 N 3 N 4 )′, the channel matrix is Λ = ...

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Abstract

A method for detecting STBC of multi-user includes sequencing the receiving S - N ratio in order to find out user corresponding to maximum S -N ratio before each user is detected at receiving end, detecting the user to obtain estimation value of user transmission signal, deducting estimation value influence out from receiving signal for resetting signal, sequencing the rest signal again for confirming next user corresponding to maximum S - N ratio and carrying out detection till transmission signal of all users are detected out successively.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a detection method of multi-user space-time block coding (STBC). Background technique [0002] Judging from the current development of communication technology, the next generation mobile communication system must have higher spectrum efficiency and transmission reliability. The multi-user (MIMO) system adopts multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end respectively, which can increase the channel capacity of the system without increasing the bandwidth, obtain transmit and receive diversity gain at the same time, and improve transmission reliability. Therefore, it has become the main development direction of the next generation wireless communication. [0003] The key to high transmission reliability of MIMO systems is the use of space-time coding techniques. Space-time coding currently mainly includes: spac...

Claims

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Application Information

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IPC IPC(8): H04L1/06
Inventor 王军文雪李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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