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Communication device, communication method, computer program and adaptive equalizer

A technology for adaptive equalization, communication equipment, applied in computer parts, computing, near-field transmission systems using transceivers, etc., can solve problems such as difficulty in obtaining adequately improved reception characteristics, and avoid compatibility problems and overhead. , the effect of improving the reception characteristics

Inactive Publication Date: 2010-06-23
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it can be considered that it is difficult to obtain sufficiently improved reception characteristics even when performing adaptive equalization using a standard FIR filter

Method used

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  • Communication device, communication method, computer program and adaptive equalizer
  • Communication device, communication method, computer program and adaptive equalizer
  • Communication device, communication method, computer program and adaptive equalizer

Examples

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Embodiment Construction

[0069] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0070] figure 1 A functional configuration of a communication system according to an embodiment of the present invention is schematically shown. The communication system shown is an interactive communication system of passive communication type conforming to NFC IP-1, which includes a reader / writer 11 and a transponder 31 . According to the embodiment of the present invention, packets in Felica format are exchanged between the reader / writer 11 and the transponder 31 according to a specific communication procedure. The reader / writer 11 includes a control unit 13 and an antenna resonance circuit unit 12 . The transponder 31 includes a control unit 34 , an antenna resonance circuit unit 32 and a load switch modulation circuit unit 33 . figure 2 The configuration of the antenna resonant circuits 12, 32 is shown in more detail.

[0071] The contr...

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PUM

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Abstract

A communication device is provided for receiving a packet including a preamble part having a continuous waveform, a sync part having a specific pattern and a data part, which has been modulated by changing electrical load. The communication device includes: a preamble detection unit for detecting the preamble part from a received signal to extract sampling timing based on the continuous waveform; a sync detection unit for detecting the sync part from the received signal based on the sampling timing to output a timing signal indicating a start position of the sync part; a delay buffer for giving a delay to the received signal so that the head of the sync part is not outputted until the detection of the sync part is determined; an adaptive equalization unit for performing adaptive equalization using the sync part based on the timing signal by inputting the delayed received signal; and a decoding unit for performing decoding processing of an equalized output signal from the adaptive equalization unit.

Description

technical field [0001] The present invention relates to a communication device, a communication method, a computer program, and an adaptive equalizer, wherein when a reader / writer (initiator) transmits a request command or a responder (target) transmits a response command with respect to the request command in contactless communication Performing a communication operation while performing a communication operation, in particular to a communication device, a communication method, a computer program and an adaptive equalizer in non-contact communication conforming to the NFC (Near Field Communication) standard. [0002] More specifically, the present invention relates to a communication device, a communication method, a computer program, and an adaptive equalizer for solving abnormal reception waveforms caused by communication rate acceleration through adaptive equalization, and particularly relates to a method based on the NFC standard that maintains A communication device, a c...

Claims

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Application Information

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IPC IPC(8): G06K17/00H04B5/02
CPCH04Q2213/13095H04L2025/03687H04B3/142H04B5/0081H04L25/03057H04B5/26
Inventor 三保田宪人
Owner SONY CORP
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