Transmission method of the universal mobile communication system and its system

A general mobile communication and transmission method technology, applied in the direction of multiplex communication, code division multiplexing system, multi-frequency code system, etc., can solve the problem of difficult to achieve, limited performance, multipath interference of single antenna system Factors increase and other issues, to achieve the effect of good anti-multipath ability and good compatibility

Active Publication Date: 2007-10-17
XFUSION DIGITAL TECH CO LTD
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Problems solved by technology

Since the M×L multipath components are not completely orthogonal and there is mutual interference, when the MIMO order is high, the factor of multipath interference increases significantly compared with the single-antenna system, which makes subsequent multi-user detectors difficult Effectively distinguish the signal flow of each spatial multiplexing
In fact, MIMO is usually mixed with high-order modulation (16QAM/64QAM), so the adverse effects of multipath interference are more significant
[0022] In actual application, the above scheme has the following problems: the current HSPA system is difficult to support wireless technologies with high spectral efficiency such a

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  • Transmission method of the universal mobile communication system and its system
  • Transmission method of the universal mobile communication system and its system
  • Transmission method of the universal mobile communication system and its system

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Embodiment Construction

[0102] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0103]The core of the present invention is that in the downlink physical channel using MIMO, the network side forms the signals of each branch into a single carrier symbol with CP, and sends them after being combined with the signals of other downlink physical channels using CDMA. The first CP of a single carrier symbol is a copy of the last partial chip of the single carrier symbol. After receiving the signal of the downlink physical channel, the UE side receives the signal of the downlink physical channel using MIMO in the frequency domain multi-user detection processing mode, and receives the signals of other downlink physical channels using the CDMA mode in the conventional CDMA mode. Among them, the multi-user detection processing in the frequency domain is t...

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Abstract

The present invention relating to the mobile communication filed discloses a transmitting method and system in the universal mobile communication system to improve the multipath interference resisting ability of the MIMO downlink physics channel on the premise of having the compatibility of UMTS system. In the present invention, each branch signals of the MIMO downlink physics channel at the network side compose the single-carrier symbols with cyclic prefix; then the symbols are sent to the UE side through the emitting antennas corresponding to the branches after being combined with the signals of other physics channel; UE processes the signals of the downlink physics channel using MIMO that has been received by the antenna in a frequency domain multi-user detecting mode, while a common CDMA receiving method is retained to other downlink physics channel.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to the transmission technology in the universal mobile communication system. Background technique [0002] The 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as "3GPP"), as an important organization in the field of mobile communications, has promoted the standardization of the 3rd Generation Mobile Communications (The Third Generation, referred to as "3G") technology. Its early protocol Both uplink and downlink services in this version are carried on dedicated channels. [0003] With the development of mobile communication technology, 3G technology is also constantly evolving. In order to further improve the performance of all aspects of Universal Mobile Telecommunications System (UMTS) in 3G, High Speed ​​Downlink Packet Access (High Speed ​​Downlink Packet Access, HSDPA for short) and High Speed ​​Uplink Packet Access (HSDPA) are introduced...

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Application Information

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IPC IPC(8): H04J13/00H04B7/04H04L27/26
Inventor 刘晟
Owner XFUSION DIGITAL TECH CO LTD
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