Transmission method and device for virtual MIMO

Abstract

The invention discloses a sending method for the virtual MIMO. The invention is characterized in that user terminals UE1 and UE2 use the same time-frequency resources and send information according to the same method, wherein the UE1 simultaneously sends DFT pretreatment signal vectors (Xk, Xk+1) at k time and k+1 time to a space-time block grouping encoder for space-time two-dimension encoding treatment in a form of the vector, and outputs two codeword vectors (Xk, Xk+1) at k time and the other two codeword vectors at k+1 time to send the codeword vectors respectively obtained at k time and k+1 time to a first transmitting channel to carry out sub-channel mapping, IFF operation, inserting cyclic prefixes and transmitting treatment; and the codeword vectors respectively obtained at k time and k+1 time are sent to a second channel to carry out sub-channel mapping, IFF operation, inserting cyclic prefixes and transmitting treatment. The invention also discloses a transmitter and a receiver for the virtual MIMO. The invention can fully utilize a multi-antenna system to provide spatial emission diversity gain and improve reliability of link transmission.

Description

technical field [0001] The present invention relates to virtual MIMO transmission technology, in particular to a virtual MIMO transmission method and device based on DFT-S-OFDM block space-time block coding. Background technique [0002] In the LTE broadband mobile communication system, 3GPP determined that the uplink adopts a single-carrier FDMA transmission scheme based on DFT-S-OFDM. Compared with the OFDM transmission scheme, the DFT-S-OFDM transmission scheme has a low peak-to-average Preserve user-orthogonal properties. [0003] At present, the uplink virtual MIMO transmission technology is introduced into the LTE communication system, and the technical solution to realize this technology is mainly a virtual MIMO transmission solution based on single transmit antenna DFT-S-OFDM. [0004] figure 1 It is a two-user virtual MIMO system based on single transmit antenna DFT-S-OFDM, where each user terminal (UE) is equipped with only a single transmit antenna, and the base...

AI Technical Summary

Problems solved by technology

However, recent studies have shown that the single-antenna-based DFT-S-OFDM transmission scheme cannot use multiple antennas to provide spatial transmit diversity gain to improve link transmission reliability, nor can it use multiple antennas to provide spatial multiplexing gain to improve link reliability. transmission capacity

[0008] In short, the existing virtual MIMO transmission scheme cannot make full use of the multi-antenna system to provide spatial transmit diversity gain, which will lead to poor reliability of link transmission

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