JPH04502844A - Cdmaセルラ電話システムにおけるダイバーシティ受信機 - Google Patents
Cdmaセルラ電話システムにおけるダイバーシティ受信機Info
- Publication number
- JPH04502844A JPH04502844A JP3500495A JP50049591A JPH04502844A JP H04502844 A JPH04502844 A JP H04502844A JP 3500495 A JP3500495 A JP 3500495A JP 50049591 A JP50049591 A JP 50049591A JP H04502844 A JPH04502844 A JP H04502844A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pilot
- receiver
- signals
- spread spectrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
Abstract
Description
Claims (1)
- 【特許請求の範囲】 (1)異なる伝播路をそれぞれ進行し、互いに関して結果的な時間差を有する多 重パイロット信号を受信し、各受信されたパイロット信号の信号強度および互い に関する対応した時間関係を決定し、最大の信号強度および対応した時間関係の 受信されたパイロット信号を示す探索制御信号を供給する探索器手段と、 前記パイロット信号の異なるものにそれぞれ対応する拡散スペクトル変調情報信 号を受信し、最大の信号強度の前記パイロット信号の1つに対応する前記拡散ス ペクトル変調情報信号の1つを復調し、情報を含むエンコードされた出力信号を 供給するために前記探索器制御信号に応答する受信機手段とを具備している拡散 スペクトル受信機サブシステム。 (2)前記受信機手段はさらに2番目に大きい信号強度の前記パイロット信号の 各別の1つにそれぞれ対応した前記拡散スペクトル変調情報信号の少なくとも1 つの付加的なものを復調し、前記情報をそれぞれ含む対応した付加的な出力信号 を供給するために探索器制御信号に応答する請求項1記載の受信機サブシステム 。 (3)前記出力信号および前記付加的な出力信号を受信し、コヒーレントに結合 し、前記情報を含む対応した結合された出力信号を供給する結合器手段を具備し ている請求項2記載の受信機サブシステム。 (4)前記出力信号および前記付加的な出力信号のそれぞれを受信して結合し、 結果的な結合出力信号を供給する結合器手段を具備している請求項2記載の受信 機サブシステム。 (5)前記結合された出力信号はエラー補正コード化されたフォーマットの前記 情報を含み、さらに前記結合された出力信号を受信してエラー補正デコードする デコーダ手段を具備している請求項4記載の受信機サブシステム。 (6)前記多重パイロット信号の各1つは前記探索器手段により受信者への異な る伝播路を進行する単一のセル位置の送信パイロット信号から結果的に生じ、前 記多重パイロット信号の各1つは伝播路に対応した時間的にオフセットされた同 じ拡散コードである請求項1記載の受信機サブシステム。 (7)前記多重パイロット信号は同じ拡散コードによって変調された単一のパイ ロット信号拡散スペクトルを送信する異なるセル位置から生じ、各セル位置の送 信した単一のパイロット信号は前記探索器手段によって受信者に異なる伝播路を 進行し、各セル位置は単一のパイロット信号を送信されたセル位置で互いに関し てオフセットされた異なるコード位相で各単一のパイロット信号を送信し、前記 多重パイロット信号の1つはその伝播路に対応して時間的にオフセットされた同 じ拡散コードの単一のパイロット信号を送信された同じセル位置から結果的に生 じる請求項1記載の受信機サブシステム。 (8)利用者情報信号が拡散スペクトル通信信号を使用してセル位置によって意 図された受信利用者に通信され、前記セル位置は予め定められたコード位相の拡 散スペクトルパイロット信号を送信し、前記セル位置の送信された拡散スペクト ル通信信号およびパイロット信号は多重パス伝播に感応するセル通信システムに おいて、受信利用者拡散スペクトル受信機は、 セル位置によって送信されたパイロット信号の多重パス伝播を含み、各多重バス 伝播パイロット信号は異なる伝播路を進行し、コード位相で対応したパス依存性 オフセットを有する入力信号を受信し、前記多重パス伝播パイロット信号の少な くとも1つの存在を検出するように異なるコード位相で走査し、各検出された多 重パス伝播パイロット信号の信号強度を測定し、それぞれ検出された多重パス伝 播パイロット信号のコード位相を決定し、最大の信号強度および対応したコード 位相の多重バス伝播パイロット信号を表す探索器制御信号を供給する探索器手段 と、 前記探索器制御信号を受信し、対応した意図された受信利用者情報信号をそれか ら抽出するように最大の信号強度の前記多重パス伝播パイロット信号に対応した 前記拡散スペクトル通信信号の前記多重パス伝播のあるものを拡散スペクトル処 理するために前記探索器制御信号に応答して各多重パス伝播パイロット信号に対 応した前記セル位置によって送信された拡散スペクトル通信信号の多重パス伝播 を含む前記入力信号を受信し、前記抽出された意図された受信利用者情報信号を 表す対応した出力信号を供給する受信機手段とを具備していることを特徴とする 受信機。 (9)前記受信機手段は前記探索器制御信号の異なるものを受信し、拡散スペク トル通信信号の前記多重パス伝播を前記入力信号において受信し、対応した多重 パス伝播パイロット信号によって与えられた同期において前記探索機制御信号に 応答した前記拡散スペクトル通信信号の前記多重バス伝播の異なる選択されたも のを拡散スペクトル処理し、前記出力信号の対応したものを供給する複数のデー タ受信機手段を具備している請求項8記載の受信機。 (10)前記出力信号を受信し、前記受信された出力信号をコヒーレントに結合 し、対応した結合された出力信号を供給する結合器手段を含む請求項8記載の受 信機。 (11)予め定められた周波数帯域でRF信号を受信し、RF信号を増幅し、対 応したIF信号を生成するように中間周波数範囲に前記増幅されたRF信号を周 波数下方変換し、前記IF信号をフィルタしデジタル化する入力受信機手段を含 み、前記デジタル化されたIF信号は前記パイロット信号の多重パス伝播および 前記拡散スペクトル通信信号の対応した多重パス伝播に対応し、前記探索器手段 および前記受信機手段に前記入力信号として前記IF信号を供給する請求項8記 載の受信機。 (12)利用者情報信号が拡散スペクトル通信信号を使用した少なくとも1つの セル位置によって意図された受信利用者に通信され、各セル位置は同じ拡散コー ドおよび予め定められた異なるコード位相の拡散スペクトルパイロット信号を送 信し、各セル位置の送信拡散スペクトル通信信号およびパイロット信号が多重パ スに感応するセル通信システムにおいて、受信利用者拡散スペクトル受信機は、 少なくとも1つのパイロット信号の多重パス伝播を含む入力信号を受信し、各パ イロット信号が複数のセル位置のそれぞれ1つによって送信され、各多重パス伝 播パイロット信号が異なる伝播バスを進行し、コード位相で対応したパス依存オ フセットを有し、前記多重パス伝播パイロット信号の少なくとも1つの存在を検 出するように異なるコード位相で走査し、各検出された多重パス伝播パイロット 信号の信号強度を測定し、各検出された多重パス伝播パイロット信号のコード位 相を決定し、最大の信号強度および対応したコード位相のの多重パス伝播パイロ ット信号を表す探索器制御信号を供給する探索器手段と、 前記探索器制御信号を受信し、前記複数のセル位置の少なくとも1つによって送 信された拡散スペクトル通信信号の多重パス伝播を含む前記入力信号を受信し、 対応した意図された受信利用者情報信号をそれから抽出するように最大の信号強 度の前記多重パス伝播パイロット信号に対応した前記拡散スペクトル通信信号の 前記多重パス伝播のあるものを拡散スペクトル処理し、前記抽出された意図され た受信利用者情報信号を表す対応した出力信号を供給するために前記拡散スペク トル通信信号の各多重パス伝播が前記探索器制御信号に応答して各多重パス伝播 パイロット信号に対応する受信機手段とを具備している受信機。 (14)前記受信機手段は前記探索器制御信号の異なるものを受信し、拡散スペ クトル通信信号の前記多重バス伝播を前記入力信号において受信し、対応した多 重パス伝播パイロット信号によって与えられた同期において前記探索器制御信号 に応答した前記拡散スペクトル通信信号の前記多重パス伝播の異なる選択された ものを拡散スペクトル処理し、前記出力信号の対応したものを供給する複数のデ ータ受信機手段を具備している請求項12記載の受信機。 (15)前記出力信号を受信し、前記受信された出力信号をコヒーレントに結合 し、対応した結合された出力信号を供給する結合器手段を含む請求項12記載の 受信機。 (16)予め定められた周波数帯域でRF信号を受信し、RF信号を増幅し、対 応したIF信号を生成するように中間周波数範囲に前記増幅されたRF信号を周 波数下方変換し、前記IF信号をフィルタし、デジタル化する入力受信機手段を 含み、前記デジタル化されたIF信号は前記パイロット信号の多重パス伝播およ び前記拡散スペクトル通信信号の対応した多重パス伝播に対応し、前記探索器手 段および前記受信機手段に前記入力信号として前記IF信号を供給する請求項1 2記載の受信機。 (17)利用者情報信号が拡散スペクトル通信信号を使用した少なくとも1つの セル位置によって意図された受信利用者に通信され、各セル位置は同じ拡散コー ドおよび予め定められた異なるコード位相の拡散スペクトルパイロット信号を送 信し、各セル位置の送信拡散スペクトル通信信号およびパイロット信号が多重パ ス伝播に感応するセル通信システムにおいて、意図された受信利用者拡散スペク トル通信信号を獲得して処理する方法は、 (a)各パイロット信号が複数のセル位置のそれぞれ1つによって送信され、各 多重パス伝播パイロット信号が異なる伝播パスを進行し、コード位相で対応した パス依存オフセットを有する少なくとも1つのパイロット信号の多重パス伝播と 、(b)前記複数のセル位置の少なくとも1つによって送信され、前記拡散スペ クトル通信信号の各多重パス伝播が各多重パス伝播パイロット信号に対応する拡 散スペクトル通信信号の多重パス伝播とを含む入力信号を受信し、前記多重パス 伝播パイロット信号の少なくとも1つの存在を検出するように異なるコード位相 で前記入力信号を走査し、各検出された多量パス伝播パイロット信号の信号強度 を測定し、 それぞれ検出された多重パス伝播パイロット信号のコード位相を決定し、 最大の信号強度および対応したコード位相の多重パス伝播パイロット信号を表す 探索器信号を供給し、前記探索器信号に応答して、対応した意図された受信利用 者情報信号をそれから抽出するように最大の信号強度の前記多重パス伝播パイロ ット信号に対応した前記拡散スペクトル通信信号の前記多重パス伝播されたもの を拡散スペクトル処理し、 前記抽出された意図された受信利用者情報信号を表す対応した出力信号を供給す るステップを含む方法。 (18)前記出力信号を結合し、 対応した結合された出力信号を供給するステップを含む請求項17記載の方法。 (19)予め定められた周波数帯域でRF信号を受信し、前記RF信号を増幅し 、 対応したIF信号を生成するように中間周波数範囲に前記増幅されたRF信号を 周波数下方変換し、前記IF信号をフィルタし、 前記IF信号をデジタル化し、 前記探索器手段および前記受信機手段に前記IF信号を前記入力信号として供給 するステップを含む請求項17記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US432,552 | 1989-11-07 | ||
US07/432,552 US5109390A (en) | 1989-11-07 | 1989-11-07 | Diversity receiver in a cdma cellular telephone system |
PCT/US1990/006417 WO1991007036A1 (en) | 1989-11-07 | 1990-11-05 | Diversity receiver in a cdma cellular telephone system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04502844A true JPH04502844A (ja) | 1992-05-21 |
JP3073767B2 JP3073767B2 (ja) | 2000-08-07 |
Family
ID=23716632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03500495A Expired - Lifetime JP3073767B2 (ja) | 1989-11-07 | 1990-11-05 | Cdmaセルラ電話システムにおけるダイバーシティ受信機 |
Country Status (22)
Country | Link |
---|---|
US (1) | US5109390A (ja) |
EP (1) | EP0500761B2 (ja) |
JP (1) | JP3073767B2 (ja) |
KR (1) | KR100218177B1 (ja) |
CN (1) | CN1036429C (ja) |
AT (1) | ATE163244T1 (ja) |
AU (1) | AU649987B2 (ja) |
BR (1) | BR9007827A (ja) |
CA (1) | CA2072876C (ja) |
DE (1) | DE69032044T3 (ja) |
DK (1) | DK0500761T4 (ja) |
ES (1) | ES2113353T5 (ja) |
FI (1) | FI108973B (ja) |
GR (1) | GR3026464T3 (ja) |
HK (1) | HK1020138A1 (ja) |
IL (1) | IL96220A (ja) |
MX (1) | MX173030B (ja) |
MY (1) | MY104809A (ja) |
NO (1) | NO304207B1 (ja) |
SG (1) | SG52745A1 (ja) |
WO (1) | WO1991007036A1 (ja) |
ZA (1) | ZA908856B (ja) |
Cited By (6)
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JPH0690220A (ja) * | 1992-06-29 | 1994-03-29 | Mitsubishi Electric Corp | スペクトル拡散通信用受信装置 |
JPH09238098A (ja) * | 1995-07-19 | 1997-09-09 | Nec Corp | Fdd/cdma送受信システム |
JP2801967B2 (ja) * | 1994-02-09 | 1998-09-21 | エヌ・ティ・ティ移動通信網株式会社 | Cdma移動通信方法及びシステム |
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US5535238A (en) | 1990-11-16 | 1996-07-09 | Interdigital Technology Corporation | Spread spectrum adaptive power control communications system and method |
US5228056A (en) * | 1990-12-14 | 1993-07-13 | Interdigital Technology Corporation | Synchronous spread-spectrum communications system and method |
US5367533A (en) * | 1990-12-05 | 1994-11-22 | Interdigital Technology Corporation | Dynamic capacity allocation CDMA spread spectrum communications |
US5224120A (en) * | 1990-12-05 | 1993-06-29 | Interdigital Technology Corporation | Dynamic capacity allocation CDMA spread spectrum communications |
US7020125B2 (en) * | 1990-12-05 | 2006-03-28 | Interdigital Technology Corporation | Broadband CDMA overlay system and method |
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