JPH03278724A - Data receiver - Google Patents
Data receiverInfo
- Publication number
- JPH03278724A JPH03278724A JP7941990A JP7941990A JPH03278724A JP H03278724 A JPH03278724 A JP H03278724A JP 7941990 A JP7941990 A JP 7941990A JP 7941990 A JP7941990 A JP 7941990A JP H03278724 A JPH03278724 A JP H03278724A
- Authority
- JP
- Japan
- Prior art keywords
- impulse response
- data
- equalizer
- time
- transmission
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 108010076504 Protein Sorting Signals Proteins 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、デジタル移動通信等に利用するデータ受信装
置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a data receiving device used in digital mobile communications and the like.
従来の技術
デジタル式のデータ通信機は、受信側において信号波形
の歪を補償する、いわゆる信号の等化を行うことができ
、それによって高い忠実度が得られるため、近年、広く
使用されるようになっている。Conventional technologyDigital data communication equipment has become widely used in recent years because it can perform so-called signal equalization, which compensates for signal waveform distortion on the receiving side, and thereby achieves high fidelity. It has become.
以下、従来のこの種のデータ受信装置を図面に基づいて
説明する。Hereinafter, a conventional data receiving device of this type will be explained based on the drawings.
第２図は従来のデータ受信装置の概略構成を示すブロッ
ク図である。第２図において、１は受信信号の入力端子
、２は入力端子１に接続されたインパルス応答推定器、
３は入力端子１とパルス応答推定器２の出力側が接続さ
れた等化器、４は等化器３からデータが出力されるデー
タ出力端子である。FIG. 2 is a block diagram showing a schematic configuration of a conventional data receiving device. In FIG. 2, 1 is an input terminal of the received signal, 2 is an impulse response estimator connected to the input terminal 1,
3 is an equalizer to which the input terminal 1 and the output side of the pulse response estimator 2 are connected; 4 is a data output terminal to which data is output from the equalizer 3;
次に上記従来例の動作について説明する。第２図におい
て、入力端子１から受信信号が入力されると、インパル
ス応答推定器２は受信信号に含まれる既知信号等を用い
て、伝送路のインパルス応答を推定する。等化器３はイ
ンパルス応答推定器２で推定したインパイレス応答が変
化しないと仮定し、上記受信信号から伝送路の歪を取り
除いてデータを復号し、この復号データをデータ出力端
子４へ出力する。Next, the operation of the above conventional example will be explained. In FIG. 2, when a received signal is input from an input terminal 1, an impulse response estimator 2 estimates the impulse response of the transmission path using known signals included in the received signal. The equalizer 3 assumes that the impulse response estimated by the impulse response estimator 2 does not change, removes transmission path distortion from the received signal, decodes the data, and outputs the decoded data to the data output terminal 4.
このように、上記従来のデータ受信装置でも、−度推定
した伝送路のインパルス応答が変化しないとすると、伝
送路での歪を取り除いて、正しくデータを復号すること
ができる。In this way, even in the conventional data receiving apparatus described above, assuming that the impulse response of the transmission path estimated by − degrees does not change, distortion in the transmission path can be removed and data can be correctly decoded.
発明が解決しようとする課題
しかしながら、上記従来のデータ受信装置では、伝送路
のインパルス応答が一定であると仮定するため、インパ
ルス応答が時間と共に変化する伝送路では、データを正
しく復号することができないという問題があった。Problems to be Solved by the Invention However, the conventional data receiving device described above assumes that the impulse response of the transmission path is constant, and therefore cannot correctly decode data on a transmission path where the impulse response changes over time. There was a problem.
本発明はこのような従来の問題を解決するものであり、
インパルス応答が時間と共に変化する伝送でもデータを
正しく復号できる優れたデータ受信装置を提供すること
を目的とするものである。The present invention solves these conventional problems,
It is an object of the present invention to provide an excellent data receiving device that can correctly decode data even in transmission where the impulse response changes over time.
課題を解決するたぬの手段
本発明は上記目的を達成するために、推定した送信信号
と受信信号から伝送路のインパルス応答を推定するイン
パルス応答推定器と、このインパルス応答推定器により
推定されたインパルス応答を用いて、受信信号が伝送路
で受けている歪を取り除いてデータを復号する等化器と
、この等化器により復号されたデータを用いて次の時刻
におけるインパルス応答を推定するのに必要な送信信号
を発生する送信信号推定器とを備える構成とした。In order to achieve the above object, the present invention provides an impulse response estimator that estimates the impulse response of a transmission path from estimated transmitted signals and received signals, and An equalizer uses the impulse response to remove the distortion that the received signal undergoes on the transmission path and decodes the data, and the data decoded by this equalizer is used to estimate the impulse response at the next time. The configuration includes a transmission signal estimator that generates a transmission signal necessary for the transmission.
作用
従って本発明によれば、あるインパルス応答に基づいて
データを復号し、その復号データを用いて次の時刻にお
けるインパルス応答を推定するのに必要な送信信号を発
生させ、この送信信号を用いて、データの復号毎に常に
最適なインパルス応答を計算することによって、時間と
共に変化するインパルス応答を正しく推定でき、伝送路
で加わる歪を取り除きながらデータを正しく復号するこ
とができる。According to the present invention, data is decoded based on a certain impulse response, the decoded data is used to generate a transmission signal necessary for estimating the impulse response at the next time, and the transmission signal is used to generate a transmission signal necessary for estimating the impulse response at the next time. By constantly calculating the optimal impulse response each time data is decoded, it is possible to accurately estimate the impulse response that changes over time, and it is possible to correctly decode data while removing distortion added in the transmission path.
実施例 以下、本発明の実施例を図面に基づいて説明する。Example Embodiments of the present invention will be described below based on the drawings.
第１図は本発明の一実施例によるデータ受信装置の概略
構成を示すブロック図である。第１図において、１１は
受信信号の入力端子、１２は入力端子１１に接続された
インパルス応答推定器、１３は入力端子１１とインパル
ス応答推定器１２の出力側が接続された等化器、１４は
入力側に等化器１３の出力側が接続され自己の出力側が
インパルス応答推定器１２の入力側に接続された送信信
号推定器、１５は等化器１３からデータが出力されるデ
ータ出力端子である。FIG. 1 is a block diagram showing a schematic configuration of a data receiving apparatus according to an embodiment of the present invention. In FIG. 1, 11 is an input terminal for a received signal, 12 is an impulse response estimator connected to the input terminal 11, 13 is an equalizer to which the input terminal 11 and the output side of the impulse response estimator 12 are connected, and 14 is an equalizer. A transmission signal estimator whose input side is connected to the output side of the equalizer 13 and whose output side is connected to the input side of the impulse response estimator 12; 15 is a data output terminal from which data is output from the equalizer 13; .
次に上記実施例の動作について説明する。第１図におい
て、受信信号が入力端子１１から入力すると、まず、受
信信号の中から既知の送信信号等を用いて、インパルス
応答推定器１２で伝送路のインパルス応答を推定する。Next, the operation of the above embodiment will be explained. In FIG. 1, when a received signal is input from an input terminal 11, an impulse response estimator 12 estimates the impulse response of the transmission path using a known transmitted signal from among the received signals.
この推定したインパルス応答を用いて等化器１３は伝送
路での歪を取り除いてデータを復号する。Using this estimated impulse response, the equalizer 13 removes distortion in the transmission path and decodes the data.
次に送信信号推定器１４では、等化器１３で１シンボル
データを復号する毎に、復号したデータを用いて、復号
データ列から送信信号列を推定して出力する。Next, the transmission signal estimator 14 uses the decoded data to estimate and output a transmission signal sequence from the decoded data sequence every time one symbol data is decoded by the equalizer 13.
そして、インパルス応答推定器１２では、上記推定され
た送信信号と受信信号から最新の時刻のインパルス応答
を推定し、次のデータの復号にはこの最新のインパルス
応答を用いるものである。Then, the impulse response estimator 12 estimates the impulse response at the latest time from the estimated transmission signal and reception signal, and uses this latest impulse response for decoding the next data.
このように、上記実施例によれば、等化器１３で復号し
た復号データを用いて送信信号を推定し、推定した送信
信号と受信信号から常に最新の伝送路のインパルス応答
を計算するので、伝送路のインパルス応答が時間と共に
変化しても、それに追従してデータを正しく復号できる
という利点を有する。In this way, according to the above embodiment, the transmission signal is estimated using the decoded data decoded by the equalizer 13, and the latest impulse response of the transmission path is always calculated from the estimated transmission signal and reception signal. This has the advantage that even if the impulse response of the transmission path changes over time, data can be correctly decoded by following it.
なお、上記実施例は、１シンボルデータを復号する毎に
インパルス応答を修正しているが、複数シンボルを復号
した後、その復号データ列から送信信号列を計算し、こ
の送信信号列に基づいて、伝送路のインパルス応答を１
シンボルデータ毎に計算して、そのインパルス応答を用
いて、再度データを復号して、復号データとしてもよい
。Note that in the above embodiment, the impulse response is corrected each time one symbol data is decoded, but after decoding a plurality of symbols, a transmission signal sequence is calculated from the decoded data sequence, and the transmission signal sequence is calculated based on this transmission signal sequence. , the impulse response of the transmission line is 1
The calculation may be performed for each symbol data, and the data may be decoded again using the impulse response to obtain decoded data.
発明の効果
上述の如く本発明によれば、推定した送信信号と受信信
号から伝送路のインパルス応答を推定するインパルス応
答推定器と、このインパルス応答推定器により推定され
たインパルス応答を用いて、受信信号が伝送路で受けて
いる歪を取り除いてデータを復号する等化器と、この等
化器により復号されたデータを用いて次の時刻における
インパルス応答を推定するのに必要な送信信号を発生す
る送信信号推定器とを備える構成としたので、あるイン
パルス応答に基づいてデータを等化器で復号し、その復
号データを用いて、次の時刻におけるインパルス応答を
推定するのに必要な送信信号を送信信号推定器で発生さ
せ、この送信信号を用いて、データの復号毎にインパル
ス応答をインパルス応答推定器で修正することができ、
よって時間と共に変化するインパルス応答を正しく推定
でき、伝送路で加わる歪を取り除きながらデータを正し
く復号することができるという効果を有する。Effects of the Invention As described above, according to the present invention, there is an impulse response estimator that estimates the impulse response of the transmission path from the estimated transmitted signal and the received signal, and the impulse response estimated by this impulse response estimator is used to An equalizer that removes the distortion that the signal receives on the transmission path and decodes the data, and uses the data decoded by this equalizer to generate the transmission signal necessary to estimate the impulse response at the next time. Since the configuration includes a transmission signal estimator that decodes data based on a certain impulse response using an equalizer, the decoded data is used to estimate the transmission signal necessary to estimate the impulse response at the next time. is generated by a transmitted signal estimator, and using this transmitted signal, the impulse response can be corrected by the impulse response estimator every time data is decoded,
Therefore, it is possible to accurately estimate the impulse response that changes with time, and it is possible to correctly decode data while removing distortion added in the transmission path.
第１図は本発明の一実施例におけるデータ受信装置の概
略構成を示すブロック図、第２図は従来のデータ受信装
置の概略構成を示すブロック図である。
１２・・・インパルス応答推定器、１３・・・等化器、
１４・・・送信信号推定器。FIG. 1 is a block diagram showing a schematic configuration of a data receiving device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a schematic configuration of a conventional data receiving device. 12... Impulse response estimator, 13... Equalizer,
14... Transmission signal estimator.
Claims (1)
答を推定するインパルス応答推定器と、このインパルス
応答推定器により推定されたインパルス応答を用いて、
受信信号が伝送路で受けている歪を取り除いてデータを
復号する等化器と、この等化器により復号されたデータ
を用いて次の時刻におけるインパルス応答を推定するの
に必要な送信信号を発生する送信信号推定器とを備えた
データ受信装置。Using an impulse response estimator that estimates the impulse response of the transmission path from the estimated transmitted signal and received signal, and the impulse response estimated by this impulse response estimator,
An equalizer that removes the distortion that the received signal is subjected to in the transmission path and decodes the data, and a transmitted signal that is necessary to estimate the impulse response at the next time using the data decoded by this equalizer. a data receiving device comprising: a transmit signal estimator for generating a transmitted signal;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2079419A JP3060479B2 (en) | 1990-03-28 | 1990-03-28 | Data receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2079419A JP3060479B2 (en) | 1990-03-28 | 1990-03-28 | Data receiving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03278724A true JPH03278724A (en) | 1991-12-10 |
| JP3060479B2 JP3060479B2 (en) | 2000-07-10 |
Family
ID=13689350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2079419A Expired - Fee Related JP3060479B2 (en) | 1990-03-28 | 1990-03-28 | Data receiving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3060479B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339328A (en) * | 2000-05-25 | 2001-12-07 | Communication Research Laboratory | Receiver, reception method, and information recording medium |
| JP2008160767A (en) * | 2006-12-26 | 2008-07-10 | Sony Corp | Signal processor and signal processing method, and program |
| WO2012011399A1 (en) * | 2010-07-23 | 2012-01-26 | シャープ株式会社 | Reception device and reception method |
-
1990
- 1990-03-28 JP JP2079419A patent/JP3060479B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339328A (en) * | 2000-05-25 | 2001-12-07 | Communication Research Laboratory | Receiver, reception method, and information recording medium |
| JP2008160767A (en) * | 2006-12-26 | 2008-07-10 | Sony Corp | Signal processor and signal processing method, and program |
| WO2012011399A1 (en) * | 2010-07-23 | 2012-01-26 | シャープ株式会社 | Reception device and reception method |
| JP2012029043A (en) * | 2010-07-23 | 2012-02-09 | Sharp Corp | Receiving device and receiving method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3060479B2 (en) | 2000-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |