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Multi-user cooperation virtual 4-antenna time circulation delayed transmission diversity system based on two-dimensional block spread spectrum (SPSP) technology

A technology of multi-user cooperation and cyclic delay, applied in the field of multi-user cooperative virtual 4-antenna space-time cyclic delay transmission diversity system, can solve the problems of poor system throughput and bit error rate performance, poor cooperation performance, multi-user interference, etc. The effect of achieving large throughput capacity, solving poor system throughput and bit error rate performance, and excellent system bit error rate performance

Inactive Publication Date: 2012-11-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of poor system throughput and bit error rate performance caused by multi-user interference in the uplink cooperative communication link in the existing cooperative communication, and poor coordination performance of multi-user virtual MIMO cooperative communication, thereby Provide a multi-user cooperative virtual 4-antenna space-time cyclic delay transmission diversity system based on two-dimensional block spread spectrum technology

Method used

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  • Multi-user cooperation virtual 4-antenna time circulation delayed transmission diversity system based on two-dimensional block spread spectrum (SPSP) technology
  • Multi-user cooperation virtual 4-antenna time circulation delayed transmission diversity system based on two-dimensional block spread spectrum (SPSP) technology
  • Multi-user cooperation virtual 4-antenna time circulation delayed transmission diversity system based on two-dimensional block spread spectrum (SPSP) technology

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specific Embodiment approach 1

[0067] Specific implementation mode 1. Combination figure 1 Describe this specific implementation mode, multi-user cooperative virtual 4-antenna space-time cyclic delay transmission diversity system based on two-dimensional block spread spectrum technology, which is characterized in that: under the SC-CDMA system, the cooperative transmission process of the source node and the relay node is :

[0068] The transmitting process of the source node in the first time slot is:

[0069] Step 1, performing chip-level spread spectrum on the modulated signal to obtain a chip-level spread spectrum signal;

[0070] Step 2, performing equivalent time-domain space-time coding on the chip-level spread-spectrum signal obtained in step 1 to obtain 2 coded signals, which are the first signal and the second signal respectively;

[0071] Step 3. Carry out block spreading of the first and second signals described in step two respectively to obtain the first and second signals after block spreadi...

specific Embodiment approach 2

[0097] Specific embodiment two, combine figure 2 Describe this specific implementation mode, a multi-user cooperative virtual 4-antenna space-time cyclic delay transmission diversity system based on two-dimensional block spread spectrum technology, under the MC-CDMA system, during the cooperative transmission process of the source node and the relay node:

[0098] The source node signal transmission process in the first time slot is:

[0099] Step 1, performing chip-level spreading and interleaving on the modulated signal to obtain a signal after chip-level spreading and interleaving;

[0100] Step 2, performing equivalent space-time encoding in time domain on the transformed signal obtained in step 1, to obtain 2 encoded signals, which are respectively the first signal and the second signal;

[0101] Step 3. Perform serial / parallel conversion on the first signal and the second signal obtained in step 2, and then perform inverse fast Fourier transform respectively, and perfo...

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Abstract

The invention provides a multi-user cooperation virtual 4-antenna time circulation delayed transmission diversity system based on a two-dimensional block spread spectrum (SPSP) technology and relates to a multi-user cooperation MIMO transmission system. The system solves the problems of multi-user interference in an uplink cooperative communication link of the existing cooperative communication and poorer system throughput and error rate performance caused by poor cooperative performance of the cooperative communication of the multi-user virtual MIMO. In the SC-CDMA and MC-CDMA systems, the trunking virtual 4-antenna time circulation delayed transmission diversity system of the invention is adopted to realize multi-user cooperative transmission. The invention is suitable to multi-user cooperative communication.

Description

technical field [0001] The invention relates to a multi-user cooperative MIMO transmission system, in particular to a multi-user cooperative virtual 4-antenna space-time cycle delay transmission diversity system. Background technique [0002] Cooperative communication is a communication method based on different source nodes (user terminals) sharing cluster head node resources (such as battery energy) in order to improve transmission quality. Through the cooperation process, when a user node encounters sharp and deep fading when sending signals to the target base station, the user can make full use of its cooperative nodes for cooperative communication in order to achieve the quality of service (QoS) required by the user transmission. Cooperative communication can make full use of different channel information of multi-user systems to form space diversity, and make full use of channel information to complete cooperation and relay other user information. [0003] However, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04B7/06H04L1/00H04B1/7097
Inventor 于启月孟维晓阮中迅
Owner HARBIN INST OF TECH
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