JP3127271B2 - Diversity reception method - Google Patents
Diversity reception methodInfo
- Publication number
- JP3127271B2 JP3127271B2 JP04180469A JP18046992A JP3127271B2 JP 3127271 B2 JP3127271 B2 JP 3127271B2 JP 04180469 A JP04180469 A JP 04180469A JP 18046992 A JP18046992 A JP 18046992A JP 3127271 B2 JP3127271 B2 JP 3127271B2
- Authority
- JP
- Japan
- Prior art keywords
- error
- phase
- error rate
- likelihood
- detection
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明はダイバーシチブランチの
選択のために、誤り率を求め、さらに該誤り率に位相尤
度の重み付けをするダイバーシチ受信方式に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diversity receiving system for obtaining an error rate for selecting a diversity branch and weighting the error rate with a phase likelihood.
【０００２】[0002]
【従来技術】フェージング特性改善のためにダイバーシ
チ受信方式が有効である。特に選択ダイバーシチ受信方
式は、互いに独立に変動するフェージングを受けた複数
の受信波の中から、受信レベルが最も高い受信波を選択
して受信する方式である。この方式は構成が簡易なため
選択ダイバーシチ受信方式は広く利用されている。2. Description of the Related Art A diversity receiving method is effective for improving fading characteristics. In particular, the selective diversity reception method is a method in which a reception wave having the highest reception level is selected and received from a plurality of reception waves that have undergone fading that fluctuate independently of each other. Since this system has a simple configuration, the selective diversity receiving system is widely used.
【０００３】選択ダイバーシチ受信方式でも特に位相尤
度を選択手段に用いたものがある。これは複数の受信枝
をそれぞれの検波位相についてその尤度を推定し、その
推定結果により受信枝の検波出力の選択を制御する方式
である。尤度を推定するのに、受信波から再生した信号
から基準位相を求め、この基準位相と検波位相との位相
差を用いている。しかしながら、基準位相と検波位相が
同じで位相差がなく位相尤度が推定できない場合、他の
選択手段が必要となる。[0003] Among the selective diversity receiving methods, there is a method in which phase likelihood is used as a selecting means. In this method, the likelihood of a plurality of reception branches is estimated for each detection phase, and the selection of the detection output of the reception branch is controlled based on the estimation result. To estimate the likelihood, a reference phase is obtained from a signal reproduced from a received wave, and a phase difference between the reference phase and a detection phase is used. However, when the reference phase and the detection phase are the same and there is no phase difference and the phase likelihood cannot be estimated, another selection means is required.
【０００４】また、誤り率を選択手段に用いたダイバー
シチ受信方式がある。これは復号時に誤り率を求め、求
めた誤り率により受信枝を制御しようとするものであ
る。誤り率を用いたダイバーシチは、受信情報が誤り検
出能力を超える誤り率になった場合、正しい選択はでき
ない。[0004] There is also a diversity reception system using an error rate as selection means. In this method, an error rate is obtained at the time of decoding, and the receiving branch is controlled based on the obtained error rate. In the diversity using the error rate, when the received information has an error rate exceeding the error detection capability, a correct selection cannot be made.
【０００５】[0005]
【発明が解決しようとする課題】上記従来の選択ダイバ
ーシチ受信方式は受信電界レベルが高い受信波を選択す
ることにより、特性が改善されるとしているが、受信感
度、隣接チャネル選択度、スプリアス感度などの電気的
特性が複数の受信部で異なる場合は改善されない。つま
り、受信電界レベルが高い受信波を選択しても必ずしも
特性が改善されるとは限らない。The above-mentioned conventional selective diversity receiving system is said to improve the characteristics by selecting a received wave having a high receiving electric field level. However, the receiving sensitivity, adjacent channel selectivity, spurious sensitivity, etc. Is not improved when the electrical characteristics of the plurality of receiving units are different. That is, even if a reception wave having a high reception electric field level is selected, the characteristics are not always improved.
【０００６】また、位相尤度を選択手段に用いた場合、
位相尤度を推定する場合に基準位相と検波位相の位相差
を用いているので、基準位相と検波位相が同じで位相差
がなく位相尤度が推定できない場合、他の選択手段が必
要となる。誤り率を選択手段に用いた場合、受信情報が
誤り検出手段の誤り検出能力を超える誤り率では正しい
選択はできない。Further, when the phase likelihood is used as the selection means,
Because of the use of phase difference between the reference phase and the detection phase when estimating the phase likelihood, the phase difference in the reference phase and the detection phase is the same
If the phase likelihood cannot be estimated due to the absence of the above, another selection means is required. If the error rate is used as the selection means,
If the error rate exceeds the error detection capability of the error detection means, a correct selection cannot be made.
【０００７】本発明は上述の点に鑑みてなされたもの
で、上記問題点を除去し常にダイバーシチの選択制御が
実現でき、複数の受信部間で電気的特性に差がある場合
でもダイバーシチ利得が稼げるダイバーシチ受信方式を
提供することにある。[0007] The present invention has been made in view of the above-mentioned points, and eliminates the above-mentioned problems, and can always implement diversity selection control. An object of the present invention is to provide a diversity receiving system that can be earned.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
本発明はダイバーシチ受信方式を、送信側で誤り検出及
び訂正符号を付加して送信し、受信側において、図１に
示すように、複数の受信手段２ａ，２ｂを設け、各々の
受信手段２ａ，２ｂで受信された受信信号に誤り検出手
段４ａ，４ｂで誤り検出を施して誤り率を求めると共
に、位相尤度推定手段３ａ，３ｂで各々の受信信号の位
相尤度を求め、誤り率が誤り検出手段の検出能力の範囲
外である場合は前記位相尤度を用い、誤り率が誤り検出
手段の検出能力の範囲内である場合は誤り率に重み付け
し、重み付けした位相尤度を用いて尤度の高いブランチ
を選択することを特徴とする。In order to solve the above-mentioned problems, the present invention provides a diversity receiving system in which an error detection and a correction code are added on the transmitting side and transmitted on the receiving side, as shown in FIG. receiving means 2a of the provided 2b, each of <br/> receiving means 2a, the error detection means 4a to the received signal received by 2b, together with obtaining the error rate by performing error detection in 4b, the phase likelihood estimator The phase likelihood of each received signal is obtained in 3a and 3b, and the error rate is in the range of the detection capability of the error detection means.
If the error rate is out of range, use the phase likelihood
Weight error rate if within means of detection
Then, a branch having a high likelihood is selected using the weighted phase likelihood .
【０００９】[0009]
【作用】本発明は上記のように、誤り率が誤り検出手段
の検出能力の範囲外である場合は前記位相尤度を用い、
誤り率が誤り検出手段の検出能力の範囲内である場合は
誤り率に重み付けし、重み付けした位相尤度を用いて尤
度の高いブランチを選択するので、常にダイバーシチの
選択制御が実現できると共に、複数の受信手段間で電気
的特性に差がある場合でもダイバーシチ利得を稼ぐこと
ができる。According to the present invention, as described above, the error rate is determined by the error detecting means.
If the detection capability is out of the range, using the phase likelihood,
If the error rate is within the detection capability of the error detection means
The error rate is weighted, and the likelihood is calculated using the weighted phase likelihood.
Since a branch with a high degree is selected, diversity selection control can always be realized, and a diversity gain can be obtained even when there are differences in electrical characteristics among a plurality of receiving means .
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１はダイバーシチ受信方式を実施するための
回路構成を示すブロック図である。図１において、１
ａ，１ｂは受信アンテナ、２ａ，２ｂは受信手段、３
ａ，３ｂは位相尤度推定手段、４ａ，４ｂは誤り検出手
段、５は比較手段、６は比較手段、７は重み付け手段で
ある。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a circuit configuration for implementing the diversity receiving system. In FIG. 1, 1
a and 1b are receiving antennas, 2a and 2b are receiving means, 3
a and 3b are phase likelihood estimating means, 4a and 4b are error detecting means, 5 is comparing means, 6 is comparing means, and 7 is weighting means.
【００１１】図示しない送信側で送信された情報がアン
テナ１ａ，１ｂによって受信され、受信手段２ａ，２ｂ
によって受信情報が復調され、復調情報Ｓ１ａ，Ｓ１ｂ
になる。該復調情報Ｓ１ａ，Ｓ１ｂは位相尤度推定手段
３ａ，３ｂによって位相尤度が推定され、比較手段６に
入力される。復調情報Ｓ１ａ，Ｓ１ｂは同時に誤り検出
手段４ａ，４ｂによって誤り率が求められる。Information transmitted on a transmitting side (not shown) is received by antennas 1a and 1b and received by receiving means 2a and 2b.
The received information is demodulated by demodulation information S1a, S1b.
become. The phase likelihood of the demodulated information S1a, S1b is estimated by the phase likelihood estimating means 3a, 3b, and is input to the comparing means 6. The error rates of the demodulated information S1a and S1b are simultaneously obtained by the error detection means 4a and 4b.
【００１２】誤り検出手段４ａ，４ｂによって求められ
た誤り率が所定の誤り検出能力の範囲内であるとき、誤
り検出手段４ａ，４ｂが働き、その出力が比較手段５に
入力される。該比較手段５によって誤り検出手段４ａ，
４ｂから出力される誤り率の割合情報Ｓ２が求められ、
重み付け手段７に出力される。When the error rates obtained by the error detecting means 4a and 4b are within the range of a predetermined error detecting ability, the error detecting means 4a and 4b operate and the output is inputted to the comparing means 5. The comparing means 5 causes the error detecting means 4a,
4b, the error rate ratio information S2 output from
It is output to the weighting means 7.
【００１３】比較手段６によって位相尤度推定手段３
ａ，３ｂからの位相尤度が比較され位相尤度比較情報Ｓ
３が重み付け手段７に出力される。重み付け手段７にお
いて、位相尤度比較情報Ｓ３は比較手段５から出力され
る誤り率の割合情報Ｓ２が重み付けされ重み付け誤り率
割合情報Ｓ４として出力される。位相尤度比較情報Ｓ３
は、比較手段５から誤り率の割合情報Ｓ２が出力されな
いとき（誤り率が誤り検出能力の範囲外のとき）は重み
付け手段７からそのまま出力される。The phase likelihood estimating means 3 is provided by the comparing means 6.
a and 3b are compared, and phase likelihood comparison information S
3 is output to the weighting means 7. The weighting means 7 weights the error rate ratio information S2 output from the comparison means 5 and outputs the phase likelihood comparison information S3 as weighted error rate ratio information S4. Phase likelihood comparison information S3
Is output from the weighting means 7 when the error rate ratio information S2 is not output from the comparison means 5 (when the error rate is out of the range of the error detection capability).
【００１４】上記位相尤度比較情報Ｓ３及び重み付け誤
り率割合情報Ｓ４は、ブランチ選択手段のために用いら
れる切り換え情報となる。誤り率が誤り検出能力の範囲
内であったら、重み付け誤り率割合情報Ｓ４が使われ、
範囲外であったら位相尤度比較情報Ｓ３が使われる。The phase likelihood comparison information S3 and the weighted error rate ratio information S4 are switching information used for branch selection means. If the error rate is within the range of the error detection capability, the weighted error rate ratio information S4 is used,
If it is out of the range, the phase likelihood comparison information S3 is used.
【００１５】[0015]
【発明の効果】以上説明したように本発明によれば、誤
り率が誤り検出手段の検出能力の範囲外である場合は前
記位相尤度を用い、誤り率が誤り検出手段の検出能力の
範囲内である場合は誤り率に重み付けし、重み付けした
位相尤度を用いて尤度の高いブランチを選択するので、
常にダイバーシチの選択制御が実現できると共に、複数
の受信手段間で電気的特性に差がある場合でもダイバー
シチ利得を稼ぐことができる。As described above, according to the present invention, an error
If the error rate is out of the range of the detection capability of the error detection means,
Using the phase likelihood, the error rate is
If within the range, the error rate is weighted and weighted
Since the branch with high likelihood is selected using the phase likelihood,
Diversity selection control can always be realized, and diversity gain can be obtained even when there is a difference in electrical characteristics among a plurality of receiving means .
【図１】ダイバーシチ受信方式を実施するための回路構
成を示すブロック図である。FIG. 1 is a block diagram showing a circuit configuration for implementing a diversity reception system.
１ａ，１ｂ 受信アンテナ ２ａ，２ｂ 受信手段 ３ａ，３ｂ 位相尤度推定手段 ４ａ，４ｂ 誤り検出手段 ５ 比較手段 ６ 比較手段 ７ 重み付け手段 1a, 1b Receiving antennas 2a, 2b Receiving means 3a, 3b Phase likelihood estimating means 4a, 4b Error detecting means 5 Comparing means 6 Comparing means 7 Weighting means
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 7/00 H04B 7/02 - 7/12 H04L 1/02 - 1/06 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) H04B 7/00 H04B 7 /02-7/12 H04L 1/02-1/06
Claims (1)
て送信し、受信側において複数の受信手段を設け、各々
受信手段で受信された受信信号に誤り検出手段で誤り検
出を施して誤り率を求めると共に、位相尤度推定手段で
各々の受信信号の位相尤度を求め、 前記誤り率が誤り検出手段の検出能力の範囲外である場
合は前記位相尤度を用い、前記誤り率が誤り検出手段の
検出能力の範囲内である場合は前記誤り率に重み付け
し、重み付けした位相尤度を用いて尤度の高いブランチ
を選択することを特徴とするダイバーシチ受信方式。1. A transmitting side transmits an error detection code with a correction code added thereto, a receiving side is provided with a plurality of receiving means, and the received signal received by each receiving means is subjected to error detection by an error detecting means to perform error detection. And the phase likelihood estimating means obtains the phase likelihood of each received signal. If the error rate is out of the detection capability of the error detecting means,
In this case, the phase likelihood is used, and the error rate is
Weight the error rate if within the range of detection capability
And a branch having a high likelihood is selected using the weighted phase likelihood .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04180469A JP3127271B2 (en) | 1992-06-15 | 1992-06-15 | Diversity reception method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04180469A JP3127271B2 (en) | 1992-06-15 | 1992-06-15 | Diversity reception method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05347607A JPH05347607A (en) | 1993-12-27 |
| JP3127271B2 true JP3127271B2 (en) | 2001-01-22 |
Family
ID=16083768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04180469A Expired - Fee Related JP3127271B2 (en) | 1992-06-15 | 1992-06-15 | Diversity reception method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3127271B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007067679A (en) * | 2005-08-30 | 2007-03-15 | Sanyo Electric Co Ltd | Diversity receiver |
-
1992
- 1992-06-15 JP JP04180469A patent/JP3127271B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05347607A (en) | 1993-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |