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United detecting method and apparatus

A joint detection and matrix technology, applied in the field of wireless communication, can solve high complexity problems

Inactive Publication Date: 2005-04-06
富士通研究开发中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when these methods are applied to UTRA-TDD and TD-SCDMA systems, the complexity is still high

Method used

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  • United detecting method and apparatus
  • United detecting method and apparatus

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Embodiment Construction

[0029] refer to figure 1 , in the same cell, the signals transmitted by at most K different users 101 through M different wireless channels 102 can be detected by the receiver 103, and the signal transmission format is as follows image 3 shown. An array 104 composed of M antennas respectively receives the signals of all K users, according to Figure 4 After the shown method extracts the data information and the training sequence information through the signal divider 107, apply figure 2 The shown joint detection means 109 estimates the data sent by K users. Image 6 The implementation process of the joint detection device 109 is given, and the structural relationship between the matrices in the implementation process is as follows: Figure 5 shown.

[0030] refer to figure 1 , each antenna unit in the receiving antenna array 104 has received all the information from K users respectively, and then the radio frequency signal is converted into a baseband signal by the down...

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Abstract

In this invention, each antenna unit in the antenna array separately receives all information of multiple users and then converts the radio frequency signal to base band signal through down transducer. The AD converter converts the analogue signals into digital signals with certain accuracy. Signal separator separates the output data sequence and train sequence and the train sequence are used in estimation of channel impulse respond. The estimation results are processed by relative channel coder and values the test apparatus property through comparing with the sending data symbols.

Description

technical field [0001] The present invention is applied in the field of wireless communication, especially a multi-user communication system based on direct sequence spread spectrum code division multiple access, and specifically relates to a joint detection method and device adopted in a mobile communication system, and the method and device can be applied in a mobile communication system The receiver of the mobile station or base station is used to simultaneously detect the data symbols transmitted by different users of the same cell included in the same transmission unit. Background technique [0002] In a system applying Direct Sequence Spread Spectrum Code Division Multiple Access (DS-CDMA: Direct Sequence-Code Division Multiple Access) technology, users in the same cell are identified by a specific user code, and the user codes at the sending end are orthogonal . Due to the influence of multipath fading, the orthogonality between user codes is destroyed, resulting in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/08H04L12/26H04L25/02
Inventor 陈东
Owner 富士通研究开发中心有限公司