JP4606441B2 - 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 - Google Patents
位相偏移変調受信装置および振幅および位相の不平衡の補正方法 Download PDFInfo
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- JP4606441B2 JP4606441B2 JP2007188695A JP2007188695A JP4606441B2 JP 4606441 B2 JP4606441 B2 JP 4606441B2 JP 2007188695 A JP2007188695 A JP 2007188695A JP 2007188695 A JP2007188695 A JP 2007188695A JP 4606441 B2 JP4606441 B2 JP 4606441B2
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- 238000000034 method Methods 0.000 title claims description 14
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0016—Stabilisation of local oscillators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Superheterodyne Receivers (AREA)
- Radar Systems Or Details Thereof (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Radio Transmission System (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measuring Fluid Pressure (AREA)
- Electrophonic Musical Instruments (AREA)
Description
fp=fS logL M (式1)
(ここで、fSはシンボル周波数、Mはメッセージ数、Lは変調元数を表す)で表されるので、Lが大きいほどパルス繰返し周波数は小さくなり、周波数帯域幅も小さくなる。
量子化レベル数=2n−1 (式2)
のnが6に等しい場合であり、精細度63レベルをもたらす。所望の信号精細度でnが定まる。
動している 場合は、このシステム17は補正に影響を及ぼさない。下流側の自動利得制御(AGC)(図示してない)は後段の信号処理(図示してない)に備えてシステム出力51Iおよび51Qを等化する。
I=x−ry (式3)
−I=−x−ry (式4)
(ここでrは相互相関に比例)の演算を行い両者から相互相関寄与分を除去する。相互相関を生ずる信号部分を除去すると、加算器69Iおよび69Qの出力71Iおよび71Qは無相関となり信号空間で互いに直交関係になる。
21I,21Q 入力端子
23I,23Q 入来シンボル
25I,25Q 可変利得増幅器
29I,29Q 絶対値算出器
33I,33Q 低域フィルタ
37 加算器
41 ハードリミタ
45 累算器
49I,49Q 利得制御信号入力端子
63I,63Q 入力端子
69I,69Q 加算器
93I,93Q 可変利得増幅器
75 ミキサ
79 積分器
83 ハードリミタ
87 累算器
101 振幅平衡化および位相平衡化組合せシステム
Claims (5)
- デジタル変調された信号のI成分およびQ成分を平衡化する方法において、
補正係数に従って、前記信号のI成分およびQ成分を増幅するステップと、
前記信号の前記I成分および前記信号の前記増幅されたQ成分を加えて、前記信号の位相平衡化されたI成分を生成するステップと、
前記信号の前記Q成分および前記信号の前記増幅されたI成分を加えて、前記信号の位相平衡化されたQ成分を生成するステップと、
前記信号の前記位相平衡化されたI成分およびQ成分を相関化するステップと、
前記相関化した結果から、前記補正係数を生成するステップと
を備えることを特徴とする方法。 - 前記相関化した結果を時間平均するステップであって、前記補正係数は前記時間平均された値から生成されるステップをさらに備えることを特徴とする請求項1に記載の方法。
- 前記信号の前記位相平衡化されたI成分およびQ成分を、ゲイン係数に従って増幅して、前記信号の振幅平衡化されたI成分およびQ成分をそれぞれ生成するステップと、
前記信号の前記振幅平衡化されたI成分およびQ成分を比較することによって、前記ゲイン係数を生成するステップと、
前記信号のI成分およびQ成分を増幅する前記ゲイン係数をフィードバックするステップと
をさらに備えることを特徴とする請求項1に記載の方法。 - 前記増幅されたI成分およびQ成分の絶対値を生成するステップであって、前記ゲイン係数は前記絶対値から生成されるステップをさらに備えることを特徴とする請求項3に記載の方法。
- 前記信号の前記増幅されたI成分およびQ成分の出力を平均化するステップであって、前記ゲイン係数は前記時間平均値から生成されるステップをさらに備えることを特徴とする請求項4に記載の方法。
Applications Claiming Priority (1)
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US09/233,791 US6377620B1 (en) | 1999-01-19 | 1999-01-19 | Balancing amplitude and phase |
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JP2005316066A Division JP4343166B2 (ja) | 1999-01-19 | 2005-10-31 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
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JP2010120543A Division JP4802288B2 (ja) | 1999-01-19 | 2010-05-26 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
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JP2007267430A JP2007267430A (ja) | 2007-10-11 |
JP4606441B2 true JP4606441B2 (ja) | 2011-01-05 |
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JP2000595470A Expired - Fee Related JP4140943B2 (ja) | 1999-01-19 | 1999-12-07 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP2005316066A Expired - Fee Related JP4343166B2 (ja) | 1999-01-19 | 2005-10-31 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP2007188695A Expired - Fee Related JP4606441B2 (ja) | 1999-01-19 | 2007-07-19 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
JP2010120543A Expired - Fee Related JP4802288B2 (ja) | 1999-01-19 | 2010-05-26 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
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JP2000595470A Expired - Fee Related JP4140943B2 (ja) | 1999-01-19 | 1999-12-07 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP2005316066A Expired - Fee Related JP4343166B2 (ja) | 1999-01-19 | 2005-10-31 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
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JP2010120543A Expired - Fee Related JP4802288B2 (ja) | 1999-01-19 | 2010-05-26 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
Country Status (12)
Country | Link |
---|---|
US (3) | US6377620B1 (ja) |
EP (2) | EP1145517B1 (ja) |
JP (4) | JP4140943B2 (ja) |
KR (1) | KR100403751B1 (ja) |
CN (1) | CN1142667C (ja) |
AT (2) | ATE281730T1 (ja) |
AU (1) | AU2588200A (ja) |
CA (3) | CA2505751C (ja) |
DE (2) | DE69943301D1 (ja) |
ES (1) | ES2232204T3 (ja) |
HK (2) | HK1040583B (ja) |
WO (1) | WO2000044143A1 (ja) |
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