Method for enhancing diversity of radio communication system

A technology of wireless communication system and diversity coding, which is applied in the field of enhancing the diversity effect of wireless communication system, and can solve the problem that the diversity method cannot obtain the antenna transmission gain coding block at the same time

Inactive Publication Date: 2009-03-11
ZTE CORP
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  • Abstract
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for enhancing the diversity effect of the wireless communication system, and solve the problem that

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  • Method for enhancing diversity of radio communication system
  • Method for enhancing diversity of radio communication system
  • Method for enhancing diversity of radio communication system

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 As shown, the diversity sending in the prior art includes the following steps:

[0041] Step 1. Modulate the binary sequence signal to be transmitted and convert it into a symbol sequence. Assuming that there are N symbols to be transmitted, record it as a vector S=[S 1 , S 2 ,...,S N ] T , where T represents the transpose of the matrix;

[0042] Step 2, encoding the symbol sequence S to be transmitted using a certain diversity method to obtain a diversity coding block;

[0043] Step 3, assign each symbol in the diversity coding block to each transmit antenna for transmission.

[0044] Taking the open-loop transmit diversity in 3GPP LTE as an example, in LTE, when the transmit antennas are 4 antennas, the diversity method of SFBC+FSTD is adopted, and the modulation symbol sequence to be transmitted after modulati...

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Abstract

The invention discloses a method increasing the diversity effect of a wireless communication system. After a binary sequence is modulated, a symbol sequence to be transmitted is transformed to cause all or one part of each symbol in the symbol sequence to be transmitted to exist in each space resources unit, each frequency resource unit and each time resource unit which are occupied by diversity coding blocks. The invention is the diversity enhancement technique which can be jointed with any one diversity method for using. The invention causes every one transmission symbol adopting the diversity method to obtain the diversity gain on the space-time frequency occupied by the whole diversity coding blocks, thereby wholly improving the quality of a transmission link.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for enhancing the diversity effect of a wireless communication system. Background technique [0002] In wireless communication, due to the complexity of the wireless channel, the signal received at the receiving end is a decaying signal with noise, and its Signal To Noise Ratio (Signal To Noise Ratio) is a random process. In the case of single-antenna transmission, when the signal-to-noise ratio becomes low, the reception effect will be poor, and the channel link will become unreliable; in the case of multi-antenna diversity transmission, the receiving end receives multi-channel For the same signal, the signal-to-noise ratio of multiple channels of the same signal is less likely to be lower than that of a single signal transmitted by a single antenna, thereby improving the reliability of the link, that is, obtaining the gain of diversity. [0003] Usually, the process of diver...

Claims

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Application Information

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IPC IPC(8): H04B7/06
CPCH04L1/0606H04B7/0669H04L1/0618H04B7/068
Inventor 李永郁光辉袁柳清
Owner ZTE CORP
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