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Code division multiple access multi-antenna open-loop diversity transmission method and base station

A technology of code division multiple access and transmission method, which is applied in the field of 4-antenna open-loop diversity transmission method and base station, which can solve the problems of limited maximum throughput and consumption, and achieve the effect of saving spreading code and pattern resources and large diversity gain

Active Publication Date: 2016-12-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]1. The open-loop diversity scheme is only applicable to 2 antennas
[0008]2. The open-loop diversity scheme can support a limited maximum throughput
[0009] 3. In the open-loop diversity scheme, each antenna needs to consume a variable-length orthogonal OVSF (Orthogonal Variable Spreading Factor) code or an orthogonal pattern

Method used

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  • Code division multiple access multi-antenna open-loop diversity transmission method and base station
  • Code division multiple access multi-antenna open-loop diversity transmission method and base station
  • Code division multiple access multi-antenna open-loop diversity transmission method and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 5

[0112] Set the round robin sequence adopted by the current base station as

[0113] {[(Ant1, Ant2); (Ant3, Ant4)], [(Ant1, Ant3); (Ant2, Ant4)], [(Ant1, Ant4); (Ant2, Ant3)]}, the round-robin period is T.

[0114] The base station stops the round-robin mode through signaling (such as HS-SCCH), and notifies the result of antenna selection. For example, in a period of time, the base station finds that the CQI value corresponding to the combination (Ant1, Ant2) is higher than other antenna combinations, Node B will stop round robin, select (Ant1, Ant2) as the fixed antenna transmission mode, and notify the UE to stop by signaling Round robin, at this time the UE can obtain more accurate channel estimation, such as through smoothing.

[0115] The base station then transmits pilot and data through a fixed combination of antennas. For example, the base station fixedly uses (Ant1, Ant2) to send pilots and data.

[0116] It should be noted that after entering the non-round-robin st...

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Abstract

The invention discloses a code division multiple access multiple-antenna open-loop diversity transmission method and system. According to the method, only one or two pilot frequencies are used, one or two antennas in four antennas are used for transmitting the pilot frequencies and data, other antennas do not transmit the pilot frequencies and data. Antenna selection in the four antennas are achieved in a round-robin mode, signal transmission through four-antenna diversity shows handling capacity gain brought by the multiple-antenna diversity technology, and an old version UE supporting only two-antenna diversity is also compatible.

Description

technical field [0001] The invention relates to multi-antenna open-loop diversity transmission, in particular to a 4-antenna open-loop diversity transmission method and a base station in a code division multiple access system. Background technique [0002] With the development of communication technology, more and more new technologies have emerged. WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) system is currently the most widely used third-generation wireless communication system. How to evolve the WCDMA system to meet the user's demand for high-speed uplink and downlink data transmission is the most important research work in the field of wireless communication. Starting from R5, a series of important technologies are introduced into WCDMA to improve the uplink and downlink data transmission rate: HSDPA (High Speed ​​Downlink Packet Access, high-speed downlink packet access), HSUPA (High Speed ​​Uplink Packet Access, high-speed upli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
Inventor 汪凡张鹏
Owner HUAWEI TECH CO LTD