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Diversity receiver and method for switching receive mode

A technology of diversity reception and reception mode, applied in the direction of space transmit diversity, diversity/multi-antenna system, radio transmission system, etc., can solve the problems of increasing current consumption and not being able to obtain sufficient receiving sensitivity

Inactive Publication Date: 2009-04-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since two antennas are used, diversity reception has the advantage of obtaining receiving sensitivity; on the other hand, diversity reception has the disadvantage of increasing consumption current
Single reception has the advantage of consuming less current due to the use of the antenna in the better receiving state of the two antennas; on the other hand, single reception has the disadvantage of not being able to obtain sufficient reception sensitivity

Method used

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  • Diversity receiver and method for switching receive mode
  • Diversity receiver and method for switching receive mode
  • Diversity receiver and method for switching receive mode

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Embodiment Construction

[0045] best practice

[0046] Referring to the accompanying drawings, preferred embodiments for carrying out the present invention will be discussed in detail.

[0047] figure 1 is a block diagram showing a schematic configuration of a diversity receiver according to the first embodiment of the present invention. exist figure 1 In the embodiment, the diversity receiver is a mobile terminal, which can receive, for example, terrestrial digital broadcasting, and includes antennas 100 and 101 for capturing wireless signals (digital modulation signals), and for capturing wireless signals from antennas 100 and 101. Tuners 102 and 103 for selecting a desired channel among signals, demodulation sections 104 and 105 for demodulating signals of channels selected in the tuners 102 and 103, selection / combining section 106, control section (reception system switching section ) 107, reception quality detection section 108, input section 109, and error correction section 110. In this e...

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Abstract

A diversity receiver capable of controlling start / stop of diversity reception under a switching condition according to the individual performance or the use environment, and a receiving-mode switching method. An input section (109) can select one of a diversity receiving mode constantly using two receiving systems, a single receiving mode constantly using a single receiving system, and an automatic control receiving mode for selecting the diversity receiving mode or the single receiving mode according to their receiving states and specifies the mode that the user uses. A control section (107) determines a selection determining criterion used in the automatic control receiving mode according to mode selection information on the other two modes.; If the diversity reception is frequently selected, the control section changes the determining criterion to the one under which switching to the diversity reception is frequently made. If the single reception is frequently switched, the control section changes the determining criterion to the one under which switching to the single reception is frequently made.

Description

technical field [0001] The present invention relates to a diversity receiver and a receiving mode switching method. Background technique [0002] Hitherto, diversity receivers including a plurality of reception branches for improving reception quality have been proposed (for example, refer to Patent Document 1). The diversity receiver in this related art measures the reception state (CNR (Carrier to Noise Ratio), BER (Bit Error Rate), PER (Packet Error Rate)) of each of wireless signals received at two antennas, or electric field strength, and switching between diversity reception and single reception based on the result, e.g. as Figure 15 shown. Specifically, the measured reception status is compared with handover determination conditions (thresholds) to determine diversity start or end, as Figure 16 shown. Since two antennas are used, diversity reception has the advantage of obtaining reception sensitivity; on the other hand, diversity reception has the disadvantage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08
CPCH04B7/0871H04B7/0877
Inventor 泉桂子今川保美佐佐木亮加贺谕盐谷宏行横长宏之
Owner PANASONIC CORP