Diversity receiver and method thereof

A technique of diversity reception and signaling, applied in the field of receivers

Inactive Publication Date: 2003-10-08
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a lot of time to compensate the phase, the traditional method has many problems in the real radio environment

Method used

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  • Diversity receiver and method thereof
  • Diversity receiver and method thereof
  • Diversity receiver and method thereof

Examples

Experimental program
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Embodiment Construction

[0033] Fig. 3 is a block diagram illustrating the structure of a diversity receiving apparatus in the present invention.

[0034] As shown in Figure 3, the diversity receiving device of the present invention comprises: only have the diversity antenna (the second antenna) 210 of signal receiving function; Have the main antenna (the first antenna) 220 of signal transmitting and receiving function; The first signal adjustment unit 380 of the first signal received by the main antenna 220; the second signal adjustment unit 390 for amplifying the second signal received by the diversity antenna 210 and phase-shifting it; each will The first and second mixers 310 and 320 that mix the first and second signal conditioning units 380 and 390 with the intermediate frequency signal; the signals output by the first and second mixers 310 and 320 Mix or select one of them from the signals output by the first and second mixers 310 and 320, and output to the signal combiner 340 of the demodulato...

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Abstract

A diversity receiving device is used for fast phase compensation, so that it is suitable for the actual radio environment where the signal phase changes rapidly. If the power difference between the two received signals is small, the in-phase combination method is used. If the two received signals If the power difference between them is large, the level comparison diversity method is adopted. Therefore, this diversity receiving arrangement absorbs the advantages of both methods. Also, since the phase shifter is in the next stage of the LNA, if the phase shifter is lossy, it won't contribute much to the overall noise of the receiver.

Description

technical field [0001] The present invention relates to a receiver in a radio communication system, in particular to a diversity receiving device and method. Background technique [0002] Diversity technology is used to improve the quality of received signals in digital radio communication systems, and many methods have been proposed to achieve this goal. In general, a diversity system consists of two or more antennas used to select or switch to a good signal, or to combine received signals to obtain a better signal than a receiver using a single antenna quality. [0003] Diversity receiving methods include selection or switching, in-phase combining or equal-gain combining, maximum ratio combining and so on. [0004] The selection diversity method is to selectively receive the strongest signal among the signals received by multiple antennas. In this way, unless the signals received by multiple antennas all drop below a receiving sensitivity at the same time, it is possibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08
CPCH04B7/084H04B7/0865H04B7/0871H04B7/08
Inventor 李元弼
Owner LG ELECTRONICS INC
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