JP2004032125A5 - - Google Patents

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JP2004032125A5
JP2004032125A5 JP2002182312A JP2002182312A JP2004032125A5 JP 2004032125 A5 JP2004032125 A5 JP 2004032125A5 JP 2002182312 A JP2002182312 A JP 2002182312A JP 2002182312 A JP2002182312 A JP 2002182312A JP 2004032125 A5 JP2004032125 A5 JP 2004032125A5
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signal
demodulated
likelihood information
received signal
reception
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JP2002182312A
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JP2004032125A (en
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Priority to JP2002182312A priority Critical patent/JP2004032125A/en
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複数ビットを一つのシンボルにマッピングする多値変調を行った信号の送受信を行う無線通信システムにおける受信装置であって、
信号の受信を行うアンテナと、受信信号をベースバンド帯域に変換する無線部と、該ベースバンド帯域に変換された受信信号の復調を行う復調器と、該復調された受信信号の尤度情報に基づいて復号を行う復号器とを具備し、
上記復調器は、上記受信信号の振幅を横軸に、尤度情報を縦軸にとって表現した場合に、上記復調信号の閾値からより遠いほうが傾きの絶対値が大きくなるような関数により、上記尤度情報を生成することを特徴とする受信装置。A receiving apparatus in a wireless communication system that performs transmission / reception of a signal subjected to multilevel modulation that maps a plurality of bits to one symbol,
An antenna for receiving a signal, a radio unit for converting the received signal into a baseband band, a demodulator for demodulating the received signal converted into the baseband band, and likelihood information of the demodulated received signal A decoder for decoding based on
When the demodulator is expressed with the amplitude of the received signal on the horizontal axis and the likelihood information on the vertical axis, the likelihood is increased by a function such that the absolute value of the slope becomes larger the farther from the demodulated signal threshold. A receiving device for generating degree information. 複数ビットを一つのシンボルにマッピングする多値変調を行った信号の送受信を行う無線通信システムにおける受信装置であって、
信号の受信を行うアンテナと、受信信号をベースバンド帯域に変換する無線部と、該ベースバンド帯域に変換された受信信号の復調を行う復調器と、該復調された受信信号の尤度情報に基づいて復号を行う復号器とを具備し、
上記復調器は、入力された多値変調信号の最小信号点間距離に応じて、最小信号点距離が大きいほど復号器に入力する尤度情報の値を大きくすることを特徴とする受信装置。 A receiving apparatus in a wireless communication system that performs transmission / reception of a signal subjected to multilevel modulation that maps a plurality of bits to one symbol,
An antenna for receiving a signal, a radio unit for converting the received signal into a baseband band, a demodulator for demodulating the received signal converted into the baseband band, and likelihood information of the demodulated received signal A decoder for decoding based on
It said demodulator, in accordance with the minimum distance between signal points of the input multi-level modulation signal, the reception apparatus characterized by increasing the value of the likelihood information input to the decoder as the minimum signal point distance is large. 複数ビットを一つのシンボルにマッピングする多値変調を行った信号の送受信を行う無線通信システムにおける受信装置であって、
信号の受信を行うアンテナと、受信信号をベースバンド帯域に変換する無線部と、該ベースバンド帯域に変換された受信信号の復調を行う復調器と、該復調された受信信号の尤度情報に基づいて復号を行う復号器とを具備し、
上記復調器は、受信信号の送信装置との間の無線伝搬路における利得に応じて、利得が大きいほど復号器に入力する尤度情報の値を大きくすることを特徴とする受信装置。 A receiving apparatus in a wireless communication system that performs transmission / reception of a signal subjected to multilevel modulation that maps a plurality of bits to one symbol,
An antenna for receiving a signal, a radio unit for converting the received signal into a baseband band, a demodulator for demodulating the received signal converted into the baseband band, and likelihood information of the demodulated received signal A decoder for decoding based on
It said demodulator, radio channel according to a gain in the reception apparatus characterized by increasing the value of the likelihood information input enough decoder large gain between the transmitter of the received signal. 複数ビットの情報を含む多値変調受信信号を復調して復調信号を形成し、該復調信号の尤度情報を形成し、上記復調信号の尤度情報に基づいて復号を行う信号処理方法において、
上記復調信号の尤度情報は、上記復調信号の振幅を横軸に、尤度情報を縦軸にとって示した場合に、上記復調信号の閾値からより遠いほうが傾きの絶対値が大きくなるような関数により求められることを特徴とする信号処理方法。In a signal processing method for demodulating a multilevel modulation reception signal including information of a plurality of bits to form a demodulated signal, forming likelihood information of the demodulated signal, and performing decoding based on the likelihood information of the demodulated signal,
Likelihood information of the demodulated signal, the amplitude of the demodulated signal on the horizontal axis, when showing the likelihood information for the vertical axis, a function such as more farther from the threshold of the demodulated signal becomes larger absolute value of the slope A signal processing method characterized by being obtained by : 複数ビットの情報を含む多値変調受信信号を復調して復調信号を形成し、該復調信号の尤度情報を形成し、上記復調信号の尤度情報に基づいて復号を行う信号処理方法において、
上記復調信号の尤度情報は、上記復調のために入力された多値変調信号の最小信号点間距離が大きいほど大きな値とすることを特徴とする信号処理方法。In a signal processing method for demodulating a multilevel modulation reception signal including information of a plurality of bits to form a demodulated signal, forming likelihood information of the demodulated signal, and performing decoding based on the likelihood information of the demodulated signal,
The likelihood information of the demodulated signal is set to a larger value as the minimum signal point distance of the multi-level modulated signal input for the demodulation is larger. 複数ビットの情報を含む多値変調受信信号を復調して復調信号を形成し、該復調信号の尤度情報を形成し、上記復調信号の尤度情報に基づいて復号を行う信号処理方法において、
上記復調信号の尤度情報は、受信信号の送信装置との間の無線伝搬路における利得が大きいほど大きな値とすることを特徴とする信号処理方法。In a signal processing method for demodulating a multilevel modulation reception signal including information of a plurality of bits to form a demodulated signal, forming likelihood information of the demodulated signal, and performing decoding based on the likelihood information of the demodulated signal,
The likelihood information of the demodulated signal is set to a larger value as the gain in the radio propagation path between the received signal and the transmission device is larger.
JP2002182312A 2002-06-24 2002-06-24 Communication system and signal processing method Pending JP2004032125A (en)

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JP2004032125A5 true JP2004032125A5 (en) 2005-06-16

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JPWO2005109811A1 (en) * 2004-05-11 2008-03-21 松下電器産業株式会社 Wireless communication apparatus and wireless communication system
JP4415777B2 (en) 2004-07-07 2010-02-17 株式会社日立製作所 Adaptive modulation method in multi-carrier communication
JP4788879B2 (en) 2005-07-08 2011-10-05 日本電気株式会社 RADIO COMMUNICATION SYSTEM, RECEPTION DEVICE USING A plurality of antennas, DEMODULATION METHOD USED FOR THEM, AND PROGRAM THEREOF
US7574645B2 (en) 2005-08-18 2009-08-11 Interdigital Technology Corporation Wireless communication method and apparatus for detecting and decoding enhanced dedicated channel hybrid automatic repeat request indicator channel transmissions
JP2007074618A (en) * 2005-09-09 2007-03-22 Sony Corp Wireless communication apparatus and wireless communication method, and computer program
KR100706618B1 (en) * 2005-12-09 2007-04-12 한국전자통신연구원 Soft decision method on the high order modulation for the iterative decoder and error correction apparatus using it
US8793560B2 (en) * 2006-03-14 2014-07-29 Qualcomm Incorporated Log-likelihood ratio (LLR) computation using piecewise linear approximation of LLR functions
JP4984281B2 (en) * 2006-08-18 2012-07-25 学校法人 名城大学 Error correction apparatus, reception apparatus, error correction method, and error correction program
JP2008153874A (en) * 2006-12-15 2008-07-03 Sumitomo Electric Ind Ltd Soft decision decoding apparatus, soft decision decoding method, and soft decision decoding program
JP5034588B2 (en) * 2007-03-20 2012-09-26 住友電気工業株式会社 Soft decision decoding apparatus and soft decision decoding program
JP5145766B2 (en) * 2007-05-21 2013-02-20 株式会社Ｊｖｃケンウッド Soft decision device and soft decision method
JP5291990B2 (en) 2008-06-05 2013-09-18 株式会社日立国際電気 RADIO COMMUNICATION SYSTEM, RECEPTION DEVICE, AND RECEPTION SIGNAL PROCESSING METHOD
JP5100797B2 (en) * 2010-08-09 2012-12-19 株式会社九州テン Digital radio signal demodulating circuit and radio receiving apparatus using the same
WO2015137049A1 (en) * 2014-03-13 2015-09-17 三菱電機株式会社 Likelihood generation device and method therefor

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