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Multi-antenna diversity method and device
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A multi-antenna and antenna technology, applied in the field of communication, can solve the problem of lack of antenna diversity processing method, and achieve the effect of good diversity gain and increased dimension
Inactive Publication Date: 2013-08-07
ZTE CORP
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[0008] The present invention is proposed in view of the lack of a diversity processing method for 8 or more antennas in the downlink in the related art. Therefore, the main purpose of the present invention is to provide a multi-antenna diversity method and device to solve the above problems
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Embodiment 1
[0047] In this embodiment K=8, and τ 1 ≠τ 2 ≠τ 3 ≠0, figure 2 The flowchart of multi-antenna diversity in this example, as shown in figure 2 As shown, performing diversity on multiple antennas in this embodiment mainly includes the following steps (step S201-step S209):
[0048] Step S201: Obtain the current group of symbols to be transmitted. In this embodiment, it is assumed that the group of symbols to be transmitted consists of 4 symbols, denoted as S 1 , S 2 , S 3 , S 4 ;
[0049] Step S203: the symbol S to be transmitted 1 , S 2 , S 3 , S 4 directly mapped to the 4 subcarriers on antenna port 1, and use space-frequency block coding to encode S 1 , S 2 , S 3 , S 4 coded as symbol-S 2 * , S 1 * ,-S 4 * , S 3 * , then -S 2 * , S 1 * ,-S 4 * , S 3 * Mapped to antenna port 5 to send;
[0050] Step S205: Put the symbol S 1 , S 2 , S 3 , S 4 Delay τ 1 After mapping to antenna port 2 for transmit, the -S 2 * , S 1 * ,-S 4 * , S 3 * ...
Embodiment 2
[0056] In this embodiment, K=8, τ 3 -τ 2 =τ 2 -τ 1 And τ 2 =λ 1 τ, τ 3 =λ 2 τ, τ 1 =τ, where, λ 1 = 2, λ 2 = 3, image 3 It is a flow chart of performing diversity on 8 antennas in this embodiment, such as image 3 As shown, performing diversity on 8 antennas in this embodiment mainly includes the following steps (step S301-step S309):
[0057] Step S301: Obtain the current group of symbols to be transmitted. In this embodiment, it is assumed that the group of symbols to be transmitted consists of 4 symbols, denoted as S 1 , S 2 , S 3 , S 4 ;
[0058] Step S303: the symbol S to be transmitted 1 , S 2 , S 3 , S 4 directly mapped to the 4 subcarriers on antenna port 1, and use space-frequency block coding to encode S 1 , S 2 , S 3 , S 4 coded as symbol-S 2 * , S 1 * ,-S 4 * , S 3 * , then -S 2 * , S 1 * ,-S 4 * , S 3 * Mapped to antenna port 5 to send;
[0059] Step S305: Put the symbol S 1 , S 2 , S 3 , S 4 Delay τ 1 After =τ is mapp...
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Abstract
The invention discloses multi-antenna diversity method and device. The method is used for realizing antenna diversity in a device adopting K antenna ports, wherein K is an even number not less than 8. The method comprises the following steps of: respectively mapping a symbol to be transmitted on each subcarrier and the symbol to be transmitted, which is subjected to space-frequency block coding, to a first antenna port and a (K / 2+1) antenna port for transmission; delaying the symbol to be transmitted and the symbol to be transmitted, which is subjected to the space-frequency block coding, andthen mapping the delayed symbol to be transmitted and the delayed symbol to be transmitted, which is subjected to the space-frequency block coding, to other antenna ports for transmission. After being used, the invention can increase the dimensionality of diversity without increasing extra pilot frequency expenses and can obtain a better diversity gain.
Description
technical field [0001] The present invention relates to the field of communications, and in particular, to a multi-antenna diversity method and device. Background technique [0002] In the Long Term Evolution (Long Term Evolution, LTE for short) system, transmit diversity, as the main method for anti-multipath fading, has been well applied in mobile communication. In addition, the transmit diversity technology can also be easily combined with space-time coding, Orthogonal Frequency Division Multiplexing (OFDM), interference suppression, and smart antenna technologies, thereby maximizing physical layerinformation transmission. reliability. [0003] At present, a multi-antenna transmit diversity scheme is proposed in the related art, and the system models of different transmit diversity are different from each other, and their performances are also different. In general, the essence of transmit diversity technology can be considered as a multi-antenna technology involving t...
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