JP4802288B2 - 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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- JP4802288B2 JP4802288B2 JP2010120543A JP2010120543A JP4802288B2 JP 4802288 B2 JP4802288 B2 JP 4802288B2 JP 2010120543 A JP2010120543 A JP 2010120543A JP 2010120543 A JP2010120543 A JP 2010120543A JP 4802288 B2 JP4802288 B2 JP 4802288B2
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- 238000000034 method Methods 0.000 title description 8
- 230000010363 phase shift Effects 0.000 title description 3
- 238000012937 correction Methods 0.000 claims description 14
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- 238000004891 communication Methods 0.000 description 5
- 238000013139 quantization Methods 0.000 description 5
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- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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)
- Radar Systems Or Details Thereof (AREA)
- Superheterodyne Receivers (AREA)
- Radio Transmission System (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (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)
- デジタル変調信号のI成分とQ成分とを平衡化させる受信機において、
補正係数に従って、前記信号のQ成分を増幅する第1のI増幅器と、
前記補正係数に従って、前記信号のI成分を増幅する第1のQ増幅器と、
前記信号の前記I成分と前記第1のI増幅器の出力とを加算して、前記信号の位相平衡化されたI成分を生成するI加算器と、
前記Q成分と前記第1のQ増幅器の出力とを加算して、前記信号の位相平衡化されたQ成分を生成するQ加算器と、
前記I加算器の出力と前記Q加算器の出力との相関をとる相関器と、
前記相関結果から、前記補正係数を生成する補正係数発生器と
を備えたことを特徴とする受信機。 - 前記相関結果を時間平均化する累算器であって、前記補正係数は前記時間平均化された値から生成される累算器をさらに備えたことを特徴とする請求項1に記載の受信機。
- ゲイン係数に従って、前記信号の前記位相平衡化されたI成分を増幅する第2のI増幅器と、
前記ゲイン係数に従って、前記信号の前記位相平衡化されたQ成分を増幅する第2のQ増幅器と、
前記第2のI増幅器の出力および前記第2のQ増幅器の出力から、前記第2のI増幅器および前記第2のQ増幅器に対する前記ゲイン係数を生成するゲイン係数生成器と
をさらに備え、
前記第2のI増幅器および前記第2のQ増幅器は、前記信号の振幅平衡化されたI成分およびQ成分を出力することを特徴とする請求項1に記載の受信機。 - 前記第2のI増幅器の出力および前記第2のQ増幅器の出力の絶対値を生成する絶対値発生器をさらに備え、前記ゲイン係数発生器は前記第2のI増幅器の出力および前記第2のQ増幅器の出力の前記絶対値から、前記ゲイン係数を生成することを特徴とする請求項3に記載の受信機。
- 前記第2のI増幅器および前記第2のQ増幅器の出力を時間平均化するローパスフィルタをさらに備え、前記ゲイン係数は前記時間平均化された値から生成されることを特徴とする請求項4に記載の受信機。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/233,791 US6377620B1 (en) | 1999-01-19 | 1999-01-19 | Balancing amplitude and phase |
US09/233,791 | 1999-01-19 |
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JP2007188695A Division 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 |
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JP2010226756A JP2010226756A (ja) | 2010-10-07 |
JP4802288B2 true JP4802288B2 (ja) | 2011-10-26 |
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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 |
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 |
Country Status (12)
Country | Link |
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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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