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Method and apparatus for transmission diversity

A technology of transmit diversity and transmit time, applied in space transmit diversity, diversity/multi-antenna systems, etc., can solve problems such as increasing system complexity and cost, and base station paralysis

Inactive Publication Date: 2009-05-27
ZTE CORP
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

This not only increases the complexity and cost of the system, but also the entire base station will be paralyzed when one or several antennas at the base station cannot work normally.

Method used

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  • Method and apparatus for transmission diversity
  • Method and apparatus for transmission diversity

Examples

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Embodiment Construction

[0035] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0036] figure 1 It is a flow chart of the transmit diversity method according to the embodiment of the present invention. In this embodiment, a base station provided with four antennas and adopting an Alamouti transmit diversity coding scheme is taken as an example to describe the present invention in detail. like figure 1 As shown, the method includes the following steps:

[0037] 101: The transmitting end determines the number of weight matrix groups according to the channel coding rate, and each group of weight matrix contains 2 weight vectors;

[0038] If the channel coding rate is K / N, select [N / K] + The group weight matrix is ​​multiplied periodically with the two-way data after diversity encoding, where [N / K] + Indicates that N / K is rounded up. Where N and K are positive integers.

[0039] In this embodiment, K=1, N=2, that is, the channel coding ...

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Abstract

The invention discloses a transmit diversity method and a transmit diversity device. The method comprises the following steps: A, data to be transmitted is subject to transmit diversity coding according to a selected transmit diversity coding scheme to generate L-way coded data; B, for each s1<t>, various elements of a first weight vector in a weight matrix are multiplied with the s1<t> respectively to obtain k weighted coded data; the k weighted coded data are transmitted on k antennas of a first antenna group respectively; the s1<t> is the first-way coded data transmitted at tth time; and different weight matrices are used to the coded data which contain the same information at different transmitting time. The transmit diversity method and the transmit diversity device can unify transmit diversity methods with different antenna configuration systems, and increase the coverage of signals. The weight matrix can be used to generate a corresponding equivalent channel response matrix at a receiving end, received signals are detected according to the same detection algorithm, and the implementation is convenient.

Description

technical field [0001] The present invention relates to a transmission diversity method and device, in particular to a mobile communication using MIMO (Multiple-Input Multiple-Out) and SIMO (Single-Input Multiple-Output) multi-antenna technologies System transmit diversity method and device. Background technique [0002] The next generation of wireless communication systems will provide better voice quality and faster data transfer rates. However, the time-varying multi-path transmission environment, limited bandwidth resources and users' demands on services make it very difficult to realize the above requirements. An effective way to solve these problems is to adopt diversity technology. Diversity technology can be divided into time diversity, frequency diversity and space diversity according to different methods of obtaining independent path signals. As far as time diversity, frequency diversity and space diversity are concerned, in the case of slow fading, time-domain ...

Claims

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Application Information

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IPC IPC(8): H04B7/06
Inventor 赵琼王衍文
Owner ZTE CORP
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