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Equalizing device and equalizing method in transmission diversity mode of LTE (long term evolution) system

A technology for transmit diversity and equalization devices, applied in space transmit diversity, baseband system components, diversity/multi-antenna systems, etc., can solve problems such as residual interference and system performance degradation

Active Publication Date: 2015-02-11
合肥东芯通信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In view of this, the purpose of the present invention is to provide an equalization device and method in transmit diversity mode in an LTE system, to overcome the residual interference caused by the introduction of non-orthogonality in the equalization method of the prior art, thus resulting in the degradation of the overall system performance The problem

Method used

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  • Equalizing device and equalizing method in transmission diversity mode of LTE (long term evolution) system
  • Equalizing device and equalizing method in transmission diversity mode of LTE (long term evolution) system
  • Equalizing device and equalizing method in transmission diversity mode of LTE (long term evolution) system

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Embodiment 1

[0092] Please refer to the attached figure 1 , which is a structural schematic diagram of an equalization device disclosed in Embodiment 1 of the present invention, which is applied in the transmit diversity mode in the Long Term Evolution LTE system, mainly including: an equivalent channel unit 101, a space division multiplexing equalization unit 102, and a second layer processing Unit 103.

[0093] exist figure 1 Among them, the equivalent channel unit 101 is based on the numbers of the transmitting antennas and the receiving antennas, and the receiving antennas are grouped in pairs according to the two-antenna transmit diversity to construct the equivalent channel.

[0094] It is assumed that NR is the number of receiving antennas at the receiving end of the system, NT is the number of transmitting antennas at the transmitting end of the system, and NR and NT are numbers greater than or equal to 1.

[0095] A set of transmitting antennas i, j is taken as an example for il...

example 1

[0109] When there are two transmitting antennas and N receiving antennas, N is greater than or equal to 1.

[0110] The equivalent channel unit 101 constructs an equivalent channel based on two transmitting antennas and N receiving antennas, and the N receiving antennas receive the data signal r sent by the two receiving antennas as shown in formula (3).

[0111] r = r 0 ( 0 ) conj ( r 0 ( 1 ) ) · · · ...

example 2

[0116] When the transmitting antenna is two and the receiving antenna is a single antenna:

[0117] The equivalent channel unit 101 constructs an equivalent channel based on two transmitting antennas and a single antenna for receiving.

[0118] The data signal r received by the single antenna is shown in formula (5).

[0119] r = r ( 0 ) conj ( r ( 1 ) ) - - - ( 5 )

[0120] The corresponding equivalent channel response H is shown in formula (6).

[0121] H ...

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Abstract

The invention discloses an equalizing device and an equalizing method in a transmission diversity mode of an LTE (long term evolution) system. The method includes the steps: constructing equivalent channels according to the number of transmitting antennas and receiving antennas, properly adjusting inputted OFDM (orthogonal frequency division multiplexing) signs and transmitting data signals and corresponding channel response in a two-antenna transmission diversity mode; precoding the channel response received by the receiving antennas; acquiring precoded channel response and the data signals received by the receiving antennas for space division multiplexing and equalizing, and acquiring and outputting a first layer and a second layer of soft bits; and receiving and processing the second layer of soft bits, and acquiring a soft bit value after negating a second soft bit value of each sign to serve as correct soft bit value output. Residual interference caused by non-orthogonality can be effectively resisted and reduced in a space division multiplexing and equalizing manner, so that system performances are improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an equalization device and method in transmit diversity mode in LTE (Long Term Evolution system, long term evolution system). Background technique [0002] In the field of communication technology, the currently widely recognized wireless communication technology is 3GP LTE, and the multiple-input multiple-output (MIMO, Multiple-Input Multiple-Out-put) technology is a key technology in the LTE system. MIMO technology is mainly used to provide space diversity gain and space division multiplexing gain. Among them, space diversity is realized by sending diversity and receiving diversity. [0003] In the LTE system, SFBC (Space Frequency Block Code, Space Frequency Block Code) transmission mode is mostly used for transmit diversity, and two symbols can be simultaneously transmitted on two subcarriers by using this transmission mode. Specifically, the two-antenna dive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L1/06H04B7/08
Inventor 莫勇张国松李亚辉胡剑锋任江涛吴齐发唐相国
Owner 合肥东芯通信股份有限公司
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