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Reception device and reception method

A technology for receivers and receiving signals, which is applied in the field of receivers and reception, can solve the problems of increasing the amount of computation, increasing the share of multi-code multiplexing numbers, etc., and achieve the effect of reducing the amount of computation

Inactive Publication Date: 2010-08-04
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] However, in the prior art described above, there is a problem that the amount of computation increases when the receiver demodulates a multi-carrier signal with a large number of sub-carriers and an MC-CDM signal.
In addition, when using the receiver to remove intersymbol interference during MC-CDM, there is still a problem that the amount of calculation only increases the number of multiplexed codes

Method used

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  • Reception device and reception method

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Experimental program
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Effect test

no. 1 approach

[0074] In this embodiment, a receiver that can obtain good characteristics even in the presence of ISI and ICI due to incoming waves exceeding the guard interval or intersymbol interference due to frequency selectivity of the transmission path will be described.

[0075] figure 1 It is a schematic block diagram showing part of the configuration of the transmitter 100 according to the first embodiment of the present invention. This transmitter 100 is provided with: MAC (Media Access Control: Media Access Control) section 70, S / P (Serial / Parallel: Serial / Parallel) conversion section 1, each code signal processing section 2-1~2-4, DTCH (Data Traffic Channel: data traffic channel) multiplexing unit 8, PICH (Pilot Channel: pilot channel) multiplexing unit 9, scrambling unit 10, IFFT (Inverse FastFourier Transform: Inverse Fast Fourier Transform) unit 11, GI insertion unit 12. Filter processing unit 71 , D / A (Digital / Analog: digital / analog) conversion unit 72 , frequency conversio...

no. 2 approach

[0276] Next, a second embodiment of the present invention will be described. In this embodiment, the following method will be described. By adaptively setting the number of block divisions for each iterative process based on the uncertainty of transmission signal duplication, etc., it is possible to suppress the duplication that occurs when the block is divided. The segmentation error caused by the uncertainty can reduce MCI (intersymbol interference) and improve the characteristics.

[0277] Since the configurations of the transmitter and receiver of the second embodiment are the same as those of the first transmitter 100 ( figure 1 ) and receiver 200 ( image 3 ) have almost the same structure, so the explanation is omitted. In addition, these explanations will be omitted for the parts of the second embodiment that are the same as those of the first embodiment, and only the differences between the second embodiment and the first embodiment will be described.

[0278] In ...

no. 3 approach

[0291] Next, a third embodiment of the present invention will be described. In the present embodiment, a method for setting the number of block divisions in the case of adaptively setting the number of block divisions for each iterative process will be described.

[0292] Since the structure of the transmitter and receiver of the third embodiment is the same as that of the first transmitter 100 ( figure 1 ) and the receiver 200 ( image 3 ) structure is almost the same, the structure of the signal detection section of the receiver related to the third embodiment is the same as that of the signal detection section 90 ( Figure 23 ) are almost the same, so these explanations are omitted. In addition, these explanations will be omitted for the parts of the third embodiment that are the same as those of the first embodiment or the second embodiment, and only the points of the third embodiment that are different from the first embodiment or the second embodiment will be describe...

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Abstract

A reception device includes: a propagation estimation unit which obtains a channel impulse response estimation value from a reception signal; a replica signal creation unit which creates a replica signal as a replica of a transmission signal according to the reception signal; a time band setting unit which sets a time band for dividing the channel impulse response estimation value; a reception signal extraction unit which extracts a reception signal of each time band set by the time setting unit by using the replica signal created by the replica signal creation unit; a synthesis unit which repeats a process for synthesizing the signal of each time band extracted by the reception signal extraction unit; and a demodulation processing unit which performs demodulation process on the signal synthesized by the synthesis unit. At least the number of time bands set for one repetition process differs.

Description

technical field [0001] The present invention relates to a receiver and a receiving method, in particular to a receiver and a receiving method for transmitting and receiving signals in a multi-carrier mode. [0002] this application claims priority based on Japanese Patent Application No. 2007-230589 for which it applied to Japan on September 5, 2007, and uses the content here. Background technique [0003] If there is an incoming wave that exceeds the guard interval (GI: Guard Interval) interval during multi-carrier transmission, inter-symbol interference occurs due to the previous symbol entering the FFT (Fast Fourier Transform: Fast Fourier Transform) interval (ISI: Inter Symbol Interference), or inter-carrier interference (ICI: Inter Carrier Interference) that occurs due to the interruption of the symbol, that is, the discontinuous interval of the signal entering the fast Fourier transform interval. [0004] Figure 26 is a diagram showing a signal from a transmitter to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B1/69H04B1/707
CPCH04B1/7115H04L25/03012H04L27/2647H04B1/7117H04L25/0212H04L5/0021
Inventor 示泽寿之吉本贵司山田良太
Owner SHARP KK