Title:
MODULATION SIGNAL PROCESSING CIRCUIT AND MODULATION SIGNAL PROCESSING METHOD
Document Type and Number:
Japanese Patent JP2014147000
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a modulation signal processing circuit and a modulation signal processing method capable of reducing a circuit scale in QPSK-IFDM, and also capable of reducing power consumption without performing a plurality of complex multiplications.SOLUTION: Provided is a modulation signal processing circuit in an OFDM-based communication system, the modulation signal processing circuit comprising: a QPSK phase modulator 31 for converting user data into a real number sequence representing a phase; a pre-stage IFDM modulator 32 for repeatedly rearranging the real number sequence from the QPSK phase modulator 31; a post-stage IFDM modulator 33 for performing a conversion process by address addition and sign inversion arithmetic on the real number sequence rearranged by the pre-stage IFDM modulator 32; and a phase IQ modulator 34 for converting the output from the post-stage IFDM modulator 33 into a complex series by using a waveform invoked from a LUT 35.
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Inventors:
AKIYAMA YUJI
OGUCHI KAZUMI
OGUCHI KAZUMI
Application Number:
JP2013015023A
Publication Date:
August 14, 2014
Filing Date:
January 30, 2013
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H04J11/00
Domestic Patent References:
| JP2007096740A | 2007-04-12 | |||
| JP2006060433A | 2006-03-02 | |||
| JP2000138648A | 2000-05-16 | |||
| JP2001119363A | 2001-04-27 |
Foreign References:
| US20050058059A1 | 2005-03-17 |
Other References:
JPN6016033825; Ｔｏｂｉａｓ Ｆｒａｎｋ ｅｔ ａｌ．: 'ＡＮ ＥＦＦＩＣＩＥＮＴ ＩＭＰＬＥＭＥＮＴＡＴＩＯＮ ＦＯＲ ＢＬＯＣＫ-ＩＦＤＭＡ' ＩＥＥＥ １８ｔｈ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｓｙｍｐｏｓｉｕｍ ｏｎ Ｐｅｒｓｏｎａｌ， Ｉｎｄｏｏｒ ａｎｄ Ｍｏｂｉｌｅ Ｒａｄｉｏ Ｃｏｍｍｕｎｉｃａｔｉｏｎｓ， ２００７， Ｐｒｏｃ． ｏ , 200712
JPN6016033826; ＮＴＴ ＤｏＣｏＭｏ， Ｆｕｊｉｔｓｕ， Ｍｉｔｓｕｂｉｓｈｉ Ｅｌｅｃｔｒｉｃ， ＳＨＡＲＰ: 'Ｒａｄｉｏ Ｐａｒａｍｅｔｅｒ Ｓｅｔ ｆｏｒ Ｓｉｎｇｌｅ-Ｃａｒｒｉｅｒ Ｂａｓｅｄ Ｒａｄｉｏ Ａｃｃｅｓｓ ｉｎ Ｅｖｏｌｖｅｄ ＵＴＲＡ Ｕｐｌｉｎｋ［ｏｎｌｉｎｅ］' ３ＧＰＰ ＴＳＧ ＲＡＮ ＷＧ１ ａｄｈｏｃ＿ＬＴＥ＿ＡＨ＿Ｊｕｎｅ-０５ Ｒ１-０５０５８８ Ｒ１-０５０５８８, 20050616, インターネット＜ＵＲＬ：ｈｔｔｐ：／／ｗｗｗ．３ｇｐｐ．ｏｒｇ／ｆｔｐ／ｔｓｇ＿ｒａ
JPN6016032341; ＭＩＣＨＥＬ ＳＣＨＮＥＬＬ ｅｔ ａｌ．: 'Ａ ＰＲＯＭＩＳＩＮＧ ＮＥＷ ＷＩＤＥＢＡＮＤ ＭＵＬＴＩＰＬＥ-ＡＣＣＥＳＳ ＳＣＨＥＭＥ ＦＯＲ ＦＵＴＵＲＥ ＭＯＢＩＬＥ ＣＯＭＭＵＮＩＣＡＴＩＯＮＳ ＳＹＳＴＥＭＳ' ＥＵＲＯＰＥＡＮ ＴＲＡＮＳＡＣＴＩＯＮＳ ＯＮ ＴＥＬＥＣＯＭＭＵＮＩＣＡＴＩＯＮＳ， Ｊｕｌｙ-Ａｕｇｕｓｔ １９９９ Ｖｏｌ．１０， Ｎｏ．４, 199907, ４１７〜４２７
JPN6016033826; ＮＴＴ ＤｏＣｏＭｏ， Ｆｕｊｉｔｓｕ， Ｍｉｔｓｕｂｉｓｈｉ Ｅｌｅｃｔｒｉｃ， ＳＨＡＲＰ: 'Ｒａｄｉｏ Ｐａｒａｍｅｔｅｒ Ｓｅｔ ｆｏｒ Ｓｉｎｇｌｅ-Ｃａｒｒｉｅｒ Ｂａｓｅｄ Ｒａｄｉｏ Ａｃｃｅｓｓ ｉｎ Ｅｖｏｌｖｅｄ ＵＴＲＡ Ｕｐｌｉｎｋ［ｏｎｌｉｎｅ］' ３ＧＰＰ ＴＳＧ ＲＡＮ ＷＧ１ ａｄｈｏｃ＿ＬＴＥ＿ＡＨ＿Ｊｕｎｅ-０５ Ｒ１-０５０５８８ Ｒ１-０５０５８８, 20050616, インターネット＜ＵＲＬ：ｈｔｔｐ：／／ｗｗｗ．３ｇｐｐ．ｏｒｇ／ｆｔｐ／ｔｓｇ＿ｒａ
JPN6016032341; ＭＩＣＨＥＬ ＳＣＨＮＥＬＬ ｅｔ ａｌ．: 'Ａ ＰＲＯＭＩＳＩＮＧ ＮＥＷ ＷＩＤＥＢＡＮＤ ＭＵＬＴＩＰＬＥ-ＡＣＣＥＳＳ ＳＣＨＥＭＥ ＦＯＲ ＦＵＴＵＲＥ ＭＯＢＩＬＥ ＣＯＭＭＵＮＩＣＡＴＩＯＮＳ ＳＹＳＴＥＭＳ' ＥＵＲＯＰＥＡＮ ＴＲＡＮＳＡＣＴＩＯＮＳ ＯＮ ＴＥＬＥＣＯＭＭＵＮＩＣＡＴＩＯＮＳ， Ｊｕｌｙ-Ａｕｇｕｓｔ １９９９ Ｖｏｌ．１０， Ｎｏ．４, 199907, ４１７〜４２７
Attorney, Agent or Firm:
Michiharu Soga
Suzuki Ken 7
Jun Kajinami
Kazuhiro Oya
Toshikazu Ueda
Junichiro Yoshida
Tomohito Iino
Suzuki Ken 7
Jun Kajinami
Kazuhiro Oya
Toshikazu Ueda
Junichiro Yoshida
Tomohito Iino
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