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TD-SCDMA uplink link method combined with MIMO technology

A TD-SCDMA and link technology, applied in multiplex communication, code division multiplex system, transmission system, etc., can solve the problems of limited number of antennas, small size, and antenna failure

Inactive Publication Date: 2007-10-03
HANGZHOU DIANZI UNIV
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Problems solved by technology

At present, some research results have been obtained on the application research of MIMO technology in WCDMA system (such as the RAKE-BLAST method mentioned in TR25848-400 in 3GPP agreement), but it has not been applied in TD-SCDMA system
[0005] There are mainly the following problems in applying MIMO technology to TD-SCDMA system: one of the most basic problems is the limitation of the number of antennas that can be installed in the mobile terminal, and the mobile terminal equipment requires small size, light weight, and low power consumption. If there are too many antennas, the antenna may not work properly. With the current technical level, it is a more appropriate choice to use two antennas in the mobile terminal; another problem is the sequence of multi-user separation and space-time decoding at the receiving end of the base station. , the multi-user separation technology used in the TD-SCDMA system itself is a very good anti-interference technology, and the space-time block coding alone in MIMO can theoretically increase the signal-to-noise ratio to M times of the original, where M refers to the smaller value of the number of transmitting antennas and the number of receiving antennas

Method used

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  • TD-SCDMA uplink link method combined with MIMO technology
  • TD-SCDMA uplink link method combined with MIMO technology

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[0023] specific implementation plan

[0024] The solution will be described in detail below with reference to the accompanying drawings and specific examples, so as to further understand the principle, steps and characteristics of the solution.

[0025] Fig. 1 is a flow chart of the mobile station proposed by the present invention. The structure diagram is composed of a user data generating unit, a modulating unit, a space-time coding unit, a spread spectrum scrambling unit, an infix code generating unit, a user frame structure forming unit and two transmitting antennas. The user data referred to here is a digital signal. If the input data is an analog signal, it should have gone through the process of modulo-digital change. After the user data passes through the modulation unit, the digital bits are mapped to complex symbols. For example, the mapping rules for digital bits modulated by QPSK are: 00+j, 01+1, 10-1, 11-j. The modulated signal will be space-time coded. Consider...

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Abstract

A method for applying MIMO technique on TD-SCDMA up-link system includes using two pairs of antennas at emission end of mobile table carrying out space-hour coding on sending data and using multi-pairs of antennas at receiving end of base station to receive space-hour coded data.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a TD-SCDMA uplink method. Background technique [0002] TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system is one of the third-generation communication (3G) standards with China's independent intellectual property rights. The joint detection technology used in it can solve the problem of multiple access interference in mobile communication and increase system anti-interference ability. The MIMO (Multiple-Input Multiple-Out-put) system is a multi-antenna communication system proposed by Bell Laboratories in the United States at the end of the last century. After using MIMO technology, the channel capacity increases linearly with the increase in the number of antennas. That is to say, without increasing spectrum resources (bandwidth) and antenna transmission power, the use of MIMO channels can double the wireless channel capacity or spectrum utilization...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/06H04L27/26H04B1/707H04J13/02
Inventor 章坚武孙雯
Owner HANGZHOU DIANZI UNIV
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