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Equipment and method for selecting matched data stream and corresponding precoding vectors

A technology of precoding vectors and data streams, which is applied in the field of communication, can solve the problems of limited number of precoding vectors and small system capacity, and achieve the effect of optimizing the system and increasing the system capacity

Inactive Publication Date: 2008-07-30
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] Due to the influence of frequency division duplex FDD (Frequency Division Duplex) feedback, the number of precoding vectors fed back by each user is limited, and each user selects the precoding vector without knowing the interference of other users, so This scheme of selecting the precoding vector makes the capacity of the system smaller

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  • Equipment and method for selecting matched data stream and corresponding precoding vectors
  • Equipment and method for selecting matched data stream and corresponding precoding vectors
  • Equipment and method for selecting matched data stream and corresponding precoding vectors

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Embodiment Construction

[0022] In order to optimize the system and increase the system capacity, the embodiment of the present invention provides a method for selecting paired data streams and corresponding precoding vectors, which is preferably applied when the reciprocity of the TDD (Time Division Duplex) channel is accurate (due to the TDD mode In the different time slots of the same frequency channel, that is, the carrier, the guard interval is used to distinguish the uplink and downlink channels. Therefore, when the reciprocity of the TDD channel is accurate, the channel status of the uplink channel can also reflect the downlink channel status well, which is channel reciprocity for TDD), see figure 1 shown, including the following main steps:

[0023] S11. The network side acquires data streams from different users sent on the same time-frequency resource block.

[0024] First, the NodeB on the network side performs adaptive coding and modulation on each user's data stream according to the chan...

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Abstract

The invention discloses a method and a device for selecting matching data flow and the corresponding pre-coded vector, which can optimize the system and increase the system capacity. The method includes the following steps: the network accesses the data flows sent from different users in the same frequency resource block; the network identifies a data flow group from the data flows and selects the pre-coded vector of each data flow in the data flow group according to the pre-coding gain and the interference among data flows. The base station comprises an access unit for accessing the data flows sent from different users in the same frequency resource block; a selecting unit for identifying a data flow group from the data flows and selecting the pre-coded vector of each data flow in the data flow group according to the pre-coding gain and the interference among data flows.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and equipment for selecting paired data streams and corresponding precoding vectors. Background technique [0002] Multiple Input Multiple Output MIMO (Multiple Input Multiple Output) technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, and signals are transmitted and received through multiple antennas at the transmitting end and receiving end, thereby improving each user's Quality of service (bit error rate or data rate). [0003] For traditional single-antenna systems, MIMO technology can greatly improve spectrum utilization, enabling the system to transmit higher-rate data services in a limited wireless frequency band. At present, countries have started or plan to conduct research on a new generation of mobile communication technology (post-3G or 4G), striving to occupy a place ...

Claims

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Application Information

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IPC IPC(8): H04L25/49H04L25/03H04B7/04H04J3/16
Inventor 金炜
Owner HUAWEI TECH CO LTD
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