JP2974880B2 - Time diversity receiver - Google Patents
Time diversity receiverInfo
- Publication number
- JP2974880B2 JP2974880B2 JP5117216A JP11721693A JP2974880B2 JP 2974880 B2 JP2974880 B2 JP 2974880B2 JP 5117216 A JP5117216 A JP 5117216A JP 11721693 A JP11721693 A JP 11721693A JP 2974880 B2 JP2974880 B2 JP 2974880B2
- Authority
- JP
- Japan
- Prior art keywords
- time diversity
- signal
- code
- detector output
- sample value
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
-
- 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
- H04B1/06—Receivers
- H04B1/16—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フェージングのある無
線通信における高品質信号伝送を行うための時間ダイバ
ーシチ受信を行う受信機に関する。本発明は、無線選択
呼出等の移動通信における移動機に利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for performing time diversity reception for transmitting high quality signals in fading radio communication. INDUSTRIAL APPLICABILITY The present invention is used for a mobile device in mobile communication such as a selective radio call.
【０００２】[0002]
【従来の技術】図２に従来の受信レベルを用いて時間ダ
イバーシチ受信を行う受信機の構成を示す。この場合送
信側の動作は同一符号信号を複数回送信する。2. Description of the Related Art FIG. 2 shows a configuration of a conventional receiver for performing time diversity reception using a reception level. In this case, the operation on the transmitting side transmits the same code signal a plurality of times.
【０００３】図２においては、２値符号を受信する場合
を例として説明する。FIG. 2 shows an example in which a binary code is received.
【０００４】アンテナ１を介して受信された信号は、受
信／復調器２および受信レベル検出器３に入力される。
受信／復調器２より出力された検波器出力信号は、符号
判定器４において２値データ（０または１）として符号
判定されたのち、時間ダイバーシチ処理を行う信号処理
部６に入力される。また、受信レベル検出器３から出力
される受信レベルの信号は、Ａ／Ｄ変換器５で標本化さ
れた後、信号処理部６に入力される。信号処理部６は、
今回受信した受信レベル標本値と、メモリ７に記憶され
ている前回までに受信した信号の受信レベル標本値を符
号ごとに比較し、受信レベル標本値の高い方に対応する
２値データを選択する時間ダイバーシチ処理を行う。さ
らに、信号処理部６は、この時間ダイバーシチ受信処理
終了後、該標本値と、およびこれに対応する２値データ
をメモリ７に記憶するとともに、端子８に出力として出
力する。以上の動作を繰り返すことによって、フェージ
ングのある移動通信伝送路において、高品質な信号伝送
が実現できる。[0004] A signal received via an antenna 1 is input to a reception / demodulator 2 and a reception level detector 3.
The detector output signal output from the receiver / demodulator 2 is sign-determined as binary data (0 or 1) by the sign determiner 4, and then input to the signal processing unit 6 that performs time diversity processing. The signal of the reception level output from the reception level detector 3 is input to the signal processing unit 6 after being sampled by the A / D converter 5. The signal processing unit 6
The received level sample value received this time is compared with the received level sample value of the signal received up to the previous time stored in the memory 7 for each code, and binary data corresponding to the higher received level sample value is selected. Perform time diversity processing. Further, after the time diversity reception processing is completed, the signal processing unit 6 stores the sample value and the corresponding binary data in the memory 7 and outputs the sample value and the binary data to the terminal 8 as an output. By repeating the above operation, high-quality signal transmission can be realized on a fading mobile communication transmission path.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上述のよう
に、高品質伝送が実現できる時間ダイバーシチ受信処理
を行うためには、受信レベル検出器３が必要であって、
回路が複雑となり、また消費電力の増加が伴う問題があ
った。However, as described above, in order to perform the time diversity reception process capable of realizing high quality transmission, the reception level detector 3 is required.
There has been a problem that the circuit becomes complicated and power consumption increases.
【０００６】本発明は、時間ダイバーシチ受信機におい
て、受信レベル検出器による回路構成の複雑さおよび消
費電力の増加の要因を除去し、消費電力を低下できる時
間ダイバーシチ受信機を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a time diversity receiver capable of reducing the power consumption by eliminating the complexity of the circuit configuration and the cause of the increase in power consumption by the reception level detector. I do.
【０００７】[0007]
【課題を解決するための手段】本発明は、同一符号信号
を複数回受信しダイバーシチ処理を行う時間ダイバーシ
チ処理手段を備えた時間ダイバーシチ受信機において、
前記時間ダイバーシチ処理手段は、再送により受信され
た信号に対する検波器出力と前回までに受信された信号
に対する検波器出力とを用いて時間ダイバーシチ受信処
理を行うことを特徴とする。SUMMARY OF THE INVENTION The present invention relates to a time diversity receiver provided with time diversity processing means for receiving the same code signal a plurality of times and performing diversity processing.
The time diversity processing means performs time diversity reception processing using a detector output for a signal received by retransmission and a detector output for a signal received up to the previous time.
【０００８】なお、検波器出力を標本化する標本化回路
と、この標本値を記憶するメモリとを備え、時間ダイバ
ーシチ処理手段は、再送により受信された信号に対する
検波器出力の標本値の絶対値と前記メモリに記憶されて
いる前回までに受信された信号に対する前記検波器出力
の標本値の絶対値とを同一受信信号について符号ごとに
比較する手段と、この絶対値が大きい方の標本値を選択
する手段とを含むことができる。A sampling circuit for sampling the detector output and a memory for storing the sampled value are provided, and the time diversity processing means includes an absolute value of the sampled value of the detector output with respect to the signal received by retransmission. Means for comparing, for each code, the absolute value of the sample value of the detector output with respect to the signal received up to the previous time stored in the memory for each code for the same received signal. Means for selecting.
【０００９】[0009]
【００１０】[0010]
【作用】本発明は、受信レベル検出を行うことなく、検
波器出力の標本値で時間ダイバーシチ処理を行う。According to the present invention, time diversity processing is performed on the sampled value of the detector output without detecting the reception level.
【００１１】時間ダイバーシチ処理としては、今回受信
した信号の検波器出力の標本値の絶対値と前回までの検
波器出力の標本値の絶対値とを比較して大きい方の標本
値を選択して時間ダイバーシチ処理を行う。これととも
に時間ダイバーシチ受信処理後の標本値をメモリに書き
込み符号ごとに符号判定を行う。In the time diversity processing, the absolute value of the sample value of the detector output of the signal received this time is compared with the absolute value of the sample value of the detector output up to the previous time, and the larger sample value is selected. Perform time diversity processing. At the same time, the sample value after the time diversity reception processing is written to the memory, and the code is determined for each code.
【００１２】[0012]
【００１３】[0013]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】（実施例１）図１を参照して本発明第一実
施例を説明する。(First Embodiment) A first embodiment of the present invention will be described with reference to FIG.
【００１５】図１は本発明の時間ダイバーシチ受信機の
構成を示す図であり、アンテナ１と、アンテナ１を介し
て受信する受信信号の受信および復調を行う受信／復調
器２と、検波器出力を標本化する標本化回路としてのＡ
／Ｄ変換器５と、この標本値を記憶するメモリ７と、時
間ダイバーシチ処理を行う信号処理部９と、符号判定器
１０とを備え、この信号処理部９は、再送により受信さ
れた信号に対する検波器出力の標本値の絶対値と、前記
メモリに記憶されている前回までに受信された信号に対
する前記検波器出力の標本値の絶対値とを同一受信信号
について符号ごとに比較する手段と、この絶対値が大き
い方の標本値を選択する手段と、時間ダイバーシチ受信
処理後の標本値を前記メモリに書き込むとともに符号ご
とに符号判定するため符号判定器１０へ出力する手段と
を含んでいる。FIG. 1 is a diagram showing the configuration of a time diversity receiver according to the present invention. An antenna 1, a reception / demodulator 2 for receiving and demodulating a reception signal received via the antenna 1, and a detector output A as a sampling circuit for sampling
/ D converter 5, a memory 7 for storing the sample values, a signal processing unit 9 for performing a time diversity process, and a sign determination unit 10. The signal processing unit 9 performs processing on a signal received by retransmission. Means for comparing, for each code, the absolute value of the sample value of the detector output and the absolute value of the sample value of the detector output for the previously received signal stored in the memory for the same received signal, It includes means for selecting the sample value having the larger absolute value, and means for writing the sample value after the time diversity reception processing into the memory and outputting the sample value to the sign judging unit 10 to judge the sign for each sign.
【００１６】次に本実施例受信機の動作を説明する。こ
の実施例においては２値符号を受信する場合を例として
説明する。Next, the operation of the receiver of this embodiment will be described. In this embodiment, a case where a binary code is received will be described as an example.
【００１７】アンテナ１を介して受信された信号は、受
信／復調器２に入力される。また、受信／復調器２より
出力された検波器出力信号は、Ａ／Ｄ変換器５において
符号ごとに標本化された後、信号処理部９に入力され
る。信号処理部９は、符号ごとに今回受信した信号の標
本値Ｘと、メモリ７より前回までに受信した同一信号の
標本値Ｙにより、つぎの（１）式を満たすＺを計算する
時間ダイバーシチ受信処理を行う。The signal received via the antenna 1 is input to the receiver / demodulator 2. The detector output signal output from the receiver / demodulator 2 is sampled for each code in the A / D converter 5 and then input to the signal processing unit 9. The signal processing unit 9 calculates, based on the sample value X of the signal received this time for each code and the sample value Y of the same signal received from the memory 7 up to the previous time, a time diversity reception that calculates Z satisfying the following equation (1). Perform processing.
【００１８】 ｜Ｚ｜＝ｍａｘ（｜Ｘ｜，｜Ｙ｜） …（１） さらに、信号処理部９は、この時間ダイバーシチ受信終
了後、この標本値Ｚをメモリ７に記憶するとともに、符
号判定器１０に出力する。また、符号判定器１０は標本
値Ｚを２値データ（０または１）として符号判定し、こ
の２値データを端子８に出力する。この動作を繰り返す
ことにより、フェージングのある移動通信伝送路におい
て、高品質な信号伝送が実現できる。| Z | = max (| X |, | Y |) (1) After completion of the time diversity reception, the signal processing unit 9 stores the sample value Z in the memory 7 and determines the sign. Output to the container 10. The sign determination unit 10 determines the sign of the sample value Z as binary data (0 or 1), and outputs the binary data to the terminal 8. By repeating this operation, high-quality signal transmission can be realized on a fading mobile communication transmission path.
【００１９】上述した実施例の時間ダイバーシチ受信機
により、受信レベル検出を行うことなく、検波器出力の
みを適用することにより時間ダイバーシチ受信処理が可
能となる。The time diversity receiver of the above-described embodiment enables time diversity reception processing by applying only the detector output without detecting the reception level.
【００２０】（第二実施例）次に本発明の第二実施例を
説明する。受信機の構成は第一実施例と同じであり、信
号処理部９での時間ダイバーシチ受信処理が第一実施例
と異なる。(Second Embodiment) Next, a second embodiment of the present invention will be described. The configuration of the receiver is the same as that of the first embodiment, and the time diversity reception processing in the signal processing unit 9 is different from that of the first embodiment.
【００２１】その動作を説明するが、送信側の動作は従
来と同様な同一符号信号を複数回送信するものであり、
受信機は２値符号を受信する場合を例として説明する。The operation will be described. The operation on the transmitting side is to transmit the same code signal a plurality of times as in the prior art.
The case where the receiver receives a binary code will be described as an example.
【００２２】アンテナ１を介して受信された信号は、受
信／復調器２に入力される。また、受信／復調器２より
出力された検波器出力信号は、Ａ／Ｄ変換器５において
符号ごとに標本化された後、信号処理部９に入力され
る。信号処理部９は、符号ごとに今回受信した信号の標
本値Ｘと、メモリ７より前回までに受信した同一信号の
標本値Ｙより、次の（２）式を満たすＺを計算する時間
ダイバーシチ受信処理を行う。The signal received via the antenna 1 is input to a receiver / demodulator 2. The detector output signal output from the receiver / demodulator 2 is sampled for each code in the A / D converter 5 and then input to the signal processing unit 9. The signal processing unit 9 calculates, for each code, a time diversity reception that calculates Z satisfying the following equation (2) from the sample value X of the signal received this time and the sample value Y of the same signal received from the memory 7 up to the previous time. Perform processing.
【００２３】 Ｚ＝Ｘ＋Ｙ …（２） さらに、信号処理部９は、この時間ダイバーシチ受信処
理終了後、この標本値Ｚをメモリ７に記憶するととも
に、符号判定器１０に出力する。また、符号判定器１０
は標本値Ｚを２値データとして符号判定し、この２値デ
ータを端子８に出力する。上記動作を繰り返すことによ
り、フェージングのある移動通信伝送路において、高品
質な信号伝送が実現できる。Z = X + Y (2) After completion of the time diversity reception processing, the signal processing unit 9 stores the sample value Z in the memory 7 and outputs the sample value Z to the sign determination unit 10. Also, the sign judging device 10
Determines the sign of the sample value Z as binary data, and outputs the binary data to the terminal 8. By repeating the above operation, high-quality signal transmission can be realized in a fading mobile communication transmission path.
【００２４】上述した実施例の時間ダイバーシチ受信機
により、受信レベル検出を行うことなく、検波器出力の
みを適用することにより時間ダイバーシチ受信処理が可
能となる。The time diversity receiver of the above-described embodiment enables time diversity reception processing by applying only the detector output without detecting the reception level.
【００２５】なお、上述した第一実施例および第二実施
例では、２値符号を受信する場合を例としてその動作を
説明したが、３値以上の符号を受信する場合も本発明は
同様に有効である。この場合、符号判定器はそれぞれの
符号の値数に対応したものとすればよい。In the first and second embodiments described above, the operation has been described by taking as an example the case of receiving a binary code. However, the present invention is similarly applicable to the case of receiving a code of three or more values. It is valid. In this case, the code determiner may be one corresponding to the number of values of each code.
【００２６】[0026]
【発明の効果】以上説明したように、本発明では、検波
器出力のみから時間ダイバーシチ受信処理を行うため、
受信レベル検出に係る回路が必要なくなり、このため、
回路構成が簡単になるとともに、受信レベル検出回路に
係る電力消費もなくなるため、受信機の低消費電力化が
可能となる。As described above, according to the present invention, time diversity reception processing is performed only from the detector output.
The circuit related to the reception level detection is no longer necessary.
Since the circuit configuration is simplified and the power consumption of the reception level detection circuit is eliminated, the power consumption of the receiver can be reduced.
【図１】本発明の第一実施例および第二実施例の時間ダ
イバーシチ受信機の構成を示す図。FIG. 1 is a diagram showing a configuration of a time diversity receiver according to a first embodiment and a second embodiment of the present invention.
【図２】従来の受信レベル検出により時間ダイバーシチ
受信処理を行う時間ダイバーシチ受信機の構成を示す
図。FIG. 2 is a diagram showing a configuration of a conventional time diversity receiver that performs time diversity reception processing by detecting a reception level.
１ アンテナ ２ 受信／復調器 ３ 受信レベル検出器 ４、１０ 符号判定器 ５ Ａ／Ｄ変換器 ６、９ 信号処理部 ７ メモリ ８ 端子 REFERENCE SIGNS LIST 1 antenna 2 reception / demodulator 3 reception level detector 4, 10 code decision unit 5 A / D converter 6, 9 signal processing unit 7 memory 8 terminals
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−28146（ＪＰ，Ａ) 特開 昭63−19932（ＪＰ，Ａ) 特開 平１−129628（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H04B 7/00 H04B 7/02 - 7/12 H04B 7/24 - 7/26 113 H04L 1/02 - 1/06 H04L 27/02 - 27/16 H04L 27/26 - 27/30 H04Q 7/00 - 7/04 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-28146 (JP, A) JP-A-63-19932 (JP, A) JP-A-1-129628 (JP, A) (58) Investigation Field (Int.Cl. 6 , DB name) H04B 7/00 H04B 7/02-7/12 H04B 7/24-7/26 113 H04L 1/02-1/06 H04L 27/02-27/16 H04L 27 / 26-27/30 H04Q 7/00-7/04
Claims (1)
チ処理を行う時間ダイバーシチ処理手段を備えた時間ダ
イバーシチ受信機において、検波器出力を標本化する標本化回路と、この標本値を記
憶するメモリとを備え、 前記 時間ダイバーシチ処理手段は、 再送により受信された信号に対する検波器出力の標本値
の絶対値と前記メモリに記憶されている前回までに受信
された信号に対する前記検波器出力の標本値の絶対値と
を同一受信信号について符号ごとに比較する手段と、 この絶対値が大きい方の標本値を選択する手段と を備え
たことを特徴とする時間ダイバーシチ受信機。In a time diversity receiver provided with time diversity processing means for receiving the same code signal a plurality of times and performing diversity processing , a sampling circuit for sampling a detector output and a sampled value are recorded.
And a memory for憶, the time diversity processing means, the sample values of the detector output for the received signal by the retransmission
And the absolute value of the sampled value of the detector output with respect to the previously received signal stored in the memory and
And a means for comparing the same received signal for each code, and a means for selecting a sample value having the larger absolute value .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5117216A JP2974880B2 (en) | 1993-05-19 | 1993-05-19 | Time diversity receiver |
| CA002136182A CA2136182C (en) | 1993-05-19 | 1994-03-14 | Time diversity receiver |
| PCT/JP1994/000400 WO1994027389A1 (en) | 1993-05-19 | 1994-03-14 | Time diversity receiver |
| US08/842,513 US5844952A (en) | 1993-05-19 | 1997-04-24 | Time diversity receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5117216A JP2974880B2 (en) | 1993-05-19 | 1993-05-19 | Time diversity receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06334572A JPH06334572A (en) | 1994-12-02 |
| JP2974880B2 true JP2974880B2 (en) | 1999-11-10 |
Family
ID=14706274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5117216A Expired - Lifetime JP2974880B2 (en) | 1993-05-19 | 1993-05-19 | Time diversity receiver |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2974880B2 (en) |
| CA (1) | CA2136182C (en) |
| WO (1) | WO1994027389A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3056077B2 (en) * | 1996-07-19 | 2000-06-26 | 静岡日本電気株式会社 | Time diversity receiver |
| JP2845825B2 (en) * | 1996-08-14 | 1999-01-13 | 静岡日本電気株式会社 | Radio selective call receiver |
| JP2957490B2 (en) * | 1996-09-18 | 1999-10-04 | 静岡日本電気株式会社 | 4-level FSK receiver |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011863B2 (en) * | 1977-06-09 | 1985-03-28 | 日本電気株式会社 | signal detection circuit |
| US4596024A (en) * | 1983-05-23 | 1986-06-17 | At&T Bell Laboratories | Data detector using probabalistic information in received signals |
| JPH04368033A (en) * | 1991-06-14 | 1992-12-21 | Sony Corp | Bit detection circuit |
-
1993
- 1993-05-19 JP JP5117216A patent/JP2974880B2/en not_active Expired - Lifetime
-
1994
- 1994-03-14 CA CA002136182A patent/CA2136182C/en not_active Expired - Lifetime
- 1994-03-14 WO PCT/JP1994/000400 patent/WO1994027389A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CA2136182C (en) | 2006-05-09 |
| WO1994027389A1 (en) | 1994-11-24 |
| CA2136182A1 (en) | 1994-11-24 |
| JPH06334572A (en) | 1994-12-02 |
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