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Space multiplexing method and apparatus in TD-SCDMA system

A TD-SCDMA, spatial multiplexing technology, applied in transmission systems, diversity/multi-antenna systems, electrical components, etc., can solve the problem that the transmission rate of the third-generation mobile communication system cannot meet the requirements, and achieve the improvement of data transmission rate and The effect of spectrum utilization

Inactive Publication Date: 2009-07-22
ZTE CORP
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Problems solved by technology

However, with the continuous and rapid development of society and economy, the number of mobile users will further increase, and there will be more and more mobile multimedia services. The transmission rate of the third-generation mobile communication system will not meet the requirements.

Method used

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  • Space multiplexing method and apparatus in TD-SCDMA system
  • Space multiplexing method and apparatus in TD-SCDMA system
  • Space multiplexing method and apparatus in TD-SCDMA system

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Embodiment Construction

[0029] The implementation of the technical solution will be further described in detail below in conjunction with the drawings.

[0030] The spatial multiplexing method in the TD-SCDMA system of the present invention mainly includes serial-to-parallel conversion, channel coding, spread spectrum, modulation, BLAST coding, channel estimation, BLAST detection, joint detection, demodulation, and channel decoding , Parallel-serial conversion and other steps, this embodiment assumes that 2 transmitting antennas and 2 receiving antennas are used; channel coding uses 1 / 3 Turbo coding, data modulation mode uses QPSK modulation, and spreading uses orthogonal variable with a spreading factor of 16. The spreading code is used for spreading, the receiving end uses the MMSE-based sequencing serial interference cancellation algorithm for BLAST detection, and the MMSE linear block equalization method for joint detection.

[0031] Such as image 3 Shown is a schematic diagram of the transmitting e...

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Abstract

The invention relates to a space reuse method in a TD-SCDMA system. The method is as follows: a high-speed data stream is converted into a plurality of paralleling low speed data streams at a transmitting terminal by serial-parallel conversion; after channel coding, spread spectrum and modulation, the layered space-time code is carried out on the low speed data streams, and then the treated low speed data streams are simultaneously transmitted on a plurality of sending antennas; correspondingly, the layered space-time decoding is carried out on receiving signals at a receiving end according to the estimation value of channels. The invention further provides a device for realizing the method. Compared with prior art, the invention not only effectively increases the data rate of a TD-SCDMA system, avoids the inversion process of a large matrix needing to be carried out when the joint detection is directly carried out, reduces the complexity and effectively increases the data transmission rate and frequency spectrum utilization.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and device for spatial multiplexing in a TD-SCDMA system. Background technique [0002] TD-SCDMA is the third-generation mobile communication standard. The TD-SCDMA system uses a series of high-tech technologies such as uplink synchronization, smart antennas, joint detection, relay handover, and software radio. It has a higher frequency spectrum than other third-generation mobile communication standards. Utilization rate and lower cost. However, with the continuous rapid development of society and economy, the number of mobile users will further increase, and there will be more and more mobile multimedia services. The transmission rate of the third-generation mobile communication system will not meet the requirements. [0003] Multi-input multi-output (MIMO) technology can significantly improve the spectrum utilization of wireless systems, thereby increasing the data tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04L1/06H04B7/02
Inventor 张婷李斌
Owner ZTE CORP
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