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Diversity type receiver apparatus and receiving method

A receiving device and a technology for receiving signals, applied in space transmit diversity, diversity/multi-antenna systems, modulated carrier systems, etc., can solve problems such as inability to obtain signal transmission parameters, poor reception conditions, and inability to extract OFDM signals

Inactive Publication Date: 2006-10-04
PANASONIC CORP
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AI Technical Summary

Problems solved by technology

[0041] Once the receiving condition of the master branch becomes worse and the OFDM signal divided into effective symbol units cannot be extracted, the synthesis unit cannot obtain the timing signal as a reference, so even if the receiving condition of the slave branch is good, it is difficult to signal synthesis
[0042] Therefore, the implementation of diversity reception will cause the reception situation to deteriorate
[0043] In addition, if the synchronization timing of the OFDM symbol of the main branch cannot be detected, information such as transmission parameters of the received signal cannot be obtained
Therefore, it is impossible to perform error correction processing by, for example, an error correction processing unit of a subsequent stage

Method used

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  • Diversity type receiver apparatus and receiving method
  • Diversity type receiver apparatus and receiving method

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Embodiment approach 1

[0069] First, an example configuration of a receiving apparatus for implementing the diversity receiving method of the present invention will be described.

[0070] figure 1 It is a block diagram showing an embodiment of the present invention.

[0071] figure 1 Among them, the antenna unit 101a converts broadcast waves transmitted by broadcast stations into electric signals and outputs them. The tuning unit 102a extracts a signal of a specific frequency band from the signal obtained from the antenna unit 101a, and converts it into a baseband or a fixed frequency band. Further, the tuning section 102a outputs the average power information of the received signal and power fluctuation information indicating the power fluctuation amount.

[0072] The A / D conversion unit 103a converts the analog signal obtained from the tuning unit into a digital signal.

[0073] Orthogonal detection section 104a detects OFDM signals, calculates and corrects the frequency error between the tr...

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Abstract

An inventive diversity type receiver apparatus can decide, in accordance with a reception status, any master branch that serves as a reference for achieving coincidence of output timings of symbol synchronizations between signals received by a plurality of branches. This arrangement allows carrier selection or combination by switching the master branch to another branch of an excellent reception even when the reception status of the master branch is significantly degraded during reception, or even when OFDM synchronization cannot be detected due to an inadvertent disconnection or brake of an antenna line on the master side.

Description

technical field [0001] The present invention relates to a receiving device and a receiving method for receiving modulated and demodulated data signal sequences by means of diversity in digital multi-value modulation. Background technique [0002] Most mobile objects such as automobiles and mobile phones use diversity reception for the purpose of stably receiving terrestrial broadcasting. [0003] As the diversity reception method, the following methods can be exemplified: a space diversity method that utilizes the difference in the spatial configuration between the transmitting and receiving antennas; a time diversity method that increases the probability of receiving the same signal by sending it multiple times; sending the same signal in multiple frequency bands, A frequency diversity method that utilizes the characteristic that fading occurs depending on the frequency band, which aims at stable reception in any frequency band, and a polarizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B7/08
CPCH04L27/2688H04L5/0023H04L27/3488H04B7/0817H04L27/2655
Inventor 谷口友彦问山圭一上田和也
Owner PANASONIC CORP
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