JPH0666722B2 - Diversity reception method in mobile station - Google Patents
Diversity reception method in mobile stationInfo
- Publication number
- JPH0666722B2 JPH0666722B2 JP58159081A JP15908183A JPH0666722B2 JP H0666722 B2 JPH0666722 B2 JP H0666722B2 JP 58159081 A JP58159081 A JP 58159081A JP 15908183 A JP15908183 A JP 15908183A JP H0666722 B2 JPH0666722 B2 JP H0666722B2
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- diversity reception
- radio base
- reception
- diversity
- 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
- 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
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/0874—Hybrid systems, i.e. switching and combining using subgroups of receive antennas
- H04B7/0877—Hybrid systems, i.e. switching and combining using subgroups of receive antennas switching off a diversity branch, e.g. to save power
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Description
【発明の詳細な説明】 〔発明の属する技術分野〕 本発明は、移動通信において移動局がフェージング軽減
のために行なうダイバーシチ受信方式に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a diversity reception system performed by a mobile station to reduce fading in mobile communication.
第１図は移動局における従来のダイバーシチ受信方式を
示すブロック図である。同図に示す方式は、２ブランチ
選択合成法によるダイバーシチ受信方式であり、かかる
選択合成法には検波前、検波後などがあるが、この場合
は検波後選択合成の場合である。FIG. 1 is a block diagram showing a conventional diversity reception system in a mobile station. The system shown in the figure is a diversity reception system based on a two-branch selective combining method. Such selective combining methods include before detection and after detection. In this case, the selective combination after detection is performed.
第１図において、１はブランチ（１）のアンテナ、２は
ブランチ（１）の受信部、３はブランチ（１）の受信レ
ベル出力信号、４はブランチ（１）の復調信号、５はブ
ランチ（２）のアンテナ、６はブランチ（２）の受信
部、７はブランチ（２）の受信レベル出力信号、８はブ
ランチ（２）の復調信号、９は選択合成部、10はダイバ
ーシチ受信復調信号である。In FIG. 1, 1 is an antenna of a branch (1), 2 is a receiving unit of the branch (1), 3 is a reception level output signal of the branch (1), 4 is a demodulation signal of the branch (1), and 5 is a branch ( 2) antenna, 6 branch (2) receiver, 7 branch (2) reception level output signal, 8 branch (2) demodulation signal, 9 selective combining section, 10 diversity reception demodulation signal is there.
アンテナ1,5でそれぞれ受信した信号はそれぞれ受信部
2,6で復調され、復調信号4,8が出力される。選択合成部
９はアンテナ１で受信した信号のレベル３とアンテナ２
で受信した信号のレベル７を比較し、ブランチ（１）の
受信レベル３の方がブランチ（２）の受信レベル７より
大きい場合、ブランチ（１）の復調信号４をダイバーシ
チ受信復調信号10として出力し、ブランチ（２）の受信
レベル７の方がブランチ（１）の受信レベル３より大き
い場合、ブランチ（２）の復調信号８をダイバーシチ受
信復調信号10として出力する。The signals received by antennas 1 and 5, respectively, are received by the receiver.
Demodulated by 2, 6 and demodulated signals 4, 8 are output. The selective combining unit 9 receives the level 3 of the signal received by the antenna 1 and the antenna 2
The level 7 of the signal received in is compared, and when the reception level 3 of the branch (1) is higher than the reception level 7 of the branch (2), the demodulation signal 4 of the branch (1) is output as the diversity reception demodulation signal 10. If the reception level 7 of the branch (2) is higher than the reception level 3 of the branch (1), the demodulation signal 8 of the branch (2) is output as the diversity reception demodulation signal 10.
図示せざる無線基地局からの信号を第１図に示すような
２ブランチ選択合成法によるダイバーシチ受信方式で移
動局が受信する場合、その時点における信号の受信レベ
ルに無関係に常にダイバーシチ受信を行っていた。この
ため２つの受信部2,6に常の電源を供給しなかればなら
ず、ダイバーシチ受信によって信号伝送信頼度、通話品
質等の面では改善効果が見られる反面、移動局装置の消
費電力が大幅に増大し、それによる不都合を招くという
欠点があった。When a mobile station receives a signal from a radio base station (not shown) by a diversity reception method based on a two-branch selective combining method as shown in FIG. 1, diversity reception is always performed regardless of the signal reception level at that time. It was For this reason, it is necessary to constantly supply power to the two receiving units 2 and 6, and although diversity reception shows an improvement effect in terms of signal transmission reliability, call quality, etc., power consumption of the mobile station device is large. However, there is a drawback that it causes an inconvenience.
第２図は移動通信における無線ゾーンの構成を示す概念
図である。FIG. 2 is a conceptual diagram showing a configuration of a wireless zone in mobile communication.
すなわち、例えば自動車電話サービスなどのサービスエ
リアとして一つの制御ゾーン内に、Ｎ個の無線基地局Ri
（ｉ＝1,2,…,N）があり、各基地局Riに属する小無線ゾ
ーンの集合により前記制御ゾーンは構成されている。そ
して各無線基地局Riは共通の無線制御局11の間をそれぞ
れ固定伝送路でつながれている。That is, for example, N radio base stations Ri are provided in one control zone as a service area for car telephone services.
(I = 1, 2, ..., N), and the control zone is constituted by a set of small radio zones belonging to each base station Ri. The radio base stations Ri are connected to the common radio control station 11 by fixed transmission lines.
無線制御局11は図示せざる移動局（自動車）用交換局を
介して一般電話回線網と接続されている。また各無線基
地局Riに属する小無線ゾーンの大きさは、当該ゾーン内
にいる移動局の送信電力によって該移動局と当該無線基
地局との間で充分に通信が可能となる広さに決められて
いる。The radio control station 11 is connected to a general telephone line network via a mobile station (automobile) switching station (not shown). Also, the size of the small radio zone belonging to each radio base station Ri is determined to be a size that enables sufficient communication between the mobile station and the radio base station due to the transmission power of the mobile station in the zone. Has been.
第2A図は移動通信における移動局呼出し用の制御チャネ
ルの信号構成を１フレーム分だけ示した説明図である。FIG. 2A is an explanatory diagram showing a signal structure of a control channel for calling a mobile station in mobile communication for one frame.
同図において、信号構成はＮ個の無線基地局（R1〜RN）
が同時に送信するタイムスロットＳと各無線基地局が個
別に順次送信するＮ個のタイムスロットSi（ｉ＝1,2,
…,N）をもって１フレームとし、かかるフレームが連続
的に繰り返される構成となっている。In the figure, the signal configuration is N radio base stations (R 1 to R N ).
Are simultaneously transmitted by the wireless base station and N time slots Si (i = 1, 2,
, N) is defined as one frame, and such a frame is continuously repeated.
すなわち、タイムスロットＳでは、とにかく制御ゾーン
内に移動局がいるかいないか基地局から知るために、移
動局に呼出し信号を各基地局が同時に送信る。制御ゾー
ン内に移動局が存在し、呼出し信号を受信した移動局
が、その呼出しが自移動局に対するものであるとき、応
答信号を基地局に送信する。以後、呼接続の制御が進
み、無線基地局と移動局の間で通信がなさることにな
る。That is, in the time slot S, each base station simultaneously transmits a paging signal to the mobile station in order to know from the base station whether there is any mobile station in the control zone. When a mobile station is present in the control zone and the mobile station receives the paging signal, when the paging is for its own mobile station, it transmits a response signal to the base station. After that, control of call connection progresses, and communication is performed between the wireless base station and the mobile station.
以上述べたように、移動局呼出し時にタイムスロットＳ
では、Ｎ個の無線基地局が同時に呼出信号を送信するた
め、他のタイムスロットS1〜SNにおける場合と異なり、
返信ダイバーシチ効果が生じて移動局側では、２ブラン
チの受信信号の選択合成によるダイバーシチ受信を必ず
しも実施しなくても、呼出信号の受信が可能であるにも
かかわらず、従来はタイムスロットにかかわりなく、移
動局ではダイバーシチ受信を行っていた。As described above, when calling the mobile station, the time slot S
Then, since N radio base stations simultaneously transmit the paging signal, unlike the case in the other time slots S 1 to S N ,
Since the return diversity effect is generated, the mobile station side can receive the ringing signal without necessarily performing the diversity reception by selectively combining the reception signals of the two branches, but conventionally, regardless of the time slot. , The mobile station was performing diversity reception.
そのためやはり消費電力の増大を招き、それによる不都
合を招来するという欠点が従来の移動局にはあった。Therefore, the conventional mobile station has a drawback that it also causes an increase in power consumption, which causes inconvenience.
本発明は、上述の如き従来技術の欠点を除去するために
なされたものであり、従って本発明の目的は、必要以上
に電力を消費しなくてもすむ経済的な移動局におけるダ
イバーシチ受信方式を提供することにある。The present invention has been made to eliminate the above-mentioned drawbacks of the prior art. Therefore, an object of the present invention is to provide an economical diversity receiving system in a mobile station that does not consume more power than necessary. To provide.
本発明の要点は、移動通信における移動局のダイバーシ
チ受信方式において、ダイバーシチ受信によらなくても
信号受信が可能なときには、ダイバーシチ受信を止めて
一方の受信系統による単独受信に切り換え、消費電力の
低減を図った点にある。The point of the present invention is to reduce power consumption by stopping diversity reception and switching to single reception by one of the receiving systems when a signal can be received without using diversity reception in a mobile station diversity reception system in mobile communication. This is the point.
次に図を参照して発明の実施例を説明する。 Next, an embodiment of the invention will be described with reference to the drawings.
所でレーレーフェージング伝搬路下でダイバーシチ受信
を適用すると、非ダイバーシチ受信時に比べ信号伝送信
頼度、通話品質の面で特性が改善される。その改善量は
ブランチ間の相関、評価パラメータによって異なるが、
例えば非ダイバーシチ受信時のビット誤り率が受信機入
力ｘ（dBμ）のときP1であった場合、ダイバーシチ受信
時には同じビット誤り率P1を得る受信機入力はｘ−Ｇ
（dBμ）（Ｇ＞０）となる。このＧがダイバーシチによ
る改善量でダイバーシチ利得とも呼ばれる。この様子を
グラフにして第３図に示す。When diversity reception is applied under Rayleigh fading propagation path, the characteristics are improved in terms of signal transmission reliability and speech quality compared to non-diversity reception. The amount of improvement depends on the correlation between branches and the evaluation parameters,
For example, if the bit error rate during non-diversity reception is P 1 when the receiver input is x (dBμ), the receiver input that obtains the same bit error rate P 1 during diversity reception is x-G.
(DBμ) (G> 0). This G is the amount of improvement due to diversity and is also called diversity gain. This situation is shown in a graph in FIG.
今、第３図においてビット誤り率P1をシステム設計にお
ける許容限界値とした場合、受信機入力がダイバーシチ
受信時にはｘ−Ｇ（dBμ）以上、非ダイバーシチ受信時
にはｘ（dBμ）以上であればよい。Now, assuming that the bit error rate P 1 in FIG. 3 is a permissible limit value in system design, the receiver input may be at least x−G (dBμ) during diversity reception, and at least x (dBμ) during non-diversity reception. .
このことから、ダイバーシチ受信機であっても常にダイ
バーシチ受信を行う必要がなく、受信機入力がｘ（dB
μ）以上あれば非ダイバーシチ受信に切り換えても所要
ビット誤り率P1以上を満たすことができる。また音声等
の受信についてもある一定値以上の受信レベルがあれば
ダイバーシチ受信しなくても十分な通話品質が得られ
る。Therefore, even with a diversity receiver, it is not necessary to always perform diversity reception, and the receiver input is x (dB
μ) or more, the required bit error rate P 1 or more can be satisfied even if switching to non-diversity reception. Also, with respect to the reception of voice and the like, if there is a reception level above a certain value, sufficient call quality can be obtained without diversity reception.
以上が本発明のよって立つ原理である。The above is the principle of the present invention.
第４図は、個別送信−ダイバーシチ受信、複局同時送信
−ダイバーシチ受信、個別送信−非ダイバーシチ受信及
び複局同時送信−非ダイバーシチ受信のそれぞれの場合
についてビット誤り率特性を示したグラフである。FIG. 4 is a graph showing bit error rate characteristics for individual transmission-diversity reception, multi-station simultaneous transmission-diversity reception, individual transmission-non-diversity reception, and multi-station simultaneous transmission-non-diversity reception.
同図において、Ｇ（dB）はダイバーシチ受信の利得、Ａ
は複局同時送信の利得である。ビット誤り率P1をシステ
ム設計における許容限界値とした場合、複局同時送信−
非ダイバーシチ受信時の所要受信機入力は、複局同時送
信−ダイバーシチ受信時の所要受信機入力ｘ−Ｇ−Ａ
（dBμ）からダイバーシチ利得Ｇを引いた値であるｘ−
Ａ（dBμ）と考えられる。In the figure, G (dB) is the gain of diversity reception, A
Is the gain of multi-station simultaneous transmission. When the bit error rate P 1 is set as the allowable limit in system design, multi-station simultaneous transmission −
Required receiver input for non-diversity reception is multi-station simultaneous transmission-Required receiver input for diversity reception x-G-A
X- which is the value obtained by subtracting the diversity gain G from (dBμ)
It is considered to be A (dBμ).
このことから、ダイバーシチ受信機で複局同時送信のタ
イムスロットでは常にダイバーシチ受信をしなくても受
信機入力がｘ−Ａ（dBμ）以上あれば非ダイバーシチ受
信に切り換えても所要ビット誤り率P1以上を満たすこと
は明らかである。From this, the required bit error rate P 1 even if switching to non-diversity reception if the receiver input is x-A (dBμ) or more even if diversity reception is not always performed in the time slot for simultaneous multi-station transmission by the diversity receiver. It is clear that the above is satisfied.
第５図は、上述の如き検討に立脚してなされた本発明の
一実施例を示すブロック図である。同図において、第１
図におけるのと同じ物には同じ符号を付してある。その
ほか、13はタイムスロット発生回路、14は同検出回路、
である。FIG. 5 is a block diagram showing an embodiment of the present invention based on the above-mentioned examination. In the figure, the first
The same parts as those in the figure are denoted by the same reference numerals. In addition, 13 is a time slot generation circuit, 14 is the same detection circuit,
Is.
移動局側では、第2A図に示した如きフレーム構成で呼出
信号のタイムスロットがS,S1〜SNの順で繰り返し変化す
ることが予め判っているので、これに同期したタイムス
ロット発生回路13を準備することは容易である。この回
路13の出力からスロット期間Ｓを検出回路14により検出
し、この期間だけ受信部６（或いは２）の電源回路をオ
フに転じてダイバーシチ受信を停止し、何れか一方のブ
ランチのみによる単独受信に切り換え、他方のブランチ
に対する給電を停止して消費電力の低減を図る。At the mobile station side, it has been known in advance that the time slot of the calling signal repeatedly changes in the order of S, S 1 to SN in the frame structure shown in FIG. 2A, so the time slot generation circuit synchronized with this Preparing 13 is easy. The slot period S is detected from the output of this circuit 13 by the detection circuit 14, and only during this period the power supply circuit of the receiving unit 6 (or 2) is turned off to stop the diversity reception, and only one of the branches receives independently. Then, the power supply to the other branch is stopped to reduce the power consumption.
第2A図を再び参照する。同図に示す制御チャネルの信号
構成は先にも説明したよに、Ｎ個の無線基地局が同時に
送信するタイムスロットＳの部分と、１個の無線基地局
がそれぞれ個別に順次に送信するタイムスロットS1〜SN
の部分とから成る。タイムスロットＳでは複数の局の同
時送信による送信ダイバーシチ効果があり、個別順次送
信のタイムスロットS1〜SNの部分より信号伝送の信頼度
は高い。Referring again to FIG. 2A. The signal structure of the control channel shown in the figure is, as described above, the time slot S portion simultaneously transmitted by N radio base stations and the time slot individually transmitted by one radio base station. Slots S 1 to S N
And part of. In the time slot S, there is a transmission diversity effect due to simultaneous transmission by a plurality of stations, and the reliability of signal transmission is higher than that in the time slot S 1 to SN portion of individual sequential transmission.
本実施例では、移動局における受信出力レベルを一々測
定することなく、単にタイムスロットがＳの期間にある
というだけでダイバーシチ受信を停止しているが、タイ
ムスロットＳの期間における受信出力レベルが充分高い
ことが予め判明しているので、本実施例によっても信号
受信の信頼度を損なわないことは明らかであろう。In the present embodiment, diversity reception is stopped simply by measuring the time slot in the period S without measuring the received power level in the mobile station one by one, but the received power level in the period of the time slot S is sufficient. Since it is known to be high, it will be clear that the present embodiment does not impair the reliability of signal reception.
以上説明したとおり、本発明によれば、移動通信におけ
る移動局のダイバーシチ受信方式において、不要な消費
電力を低減できるという利点がある。As described above, according to the present invention, there is an advantage that unnecessary power consumption can be reduced in the diversity receiving system of a mobile station in mobile communication.
なお、本発明は、３ブランチ以上のダイバーシチ受信、
或いは選択合成法以外の最大比合成法、等利得合成法な
どの合成法によるダイバーシチ受信においても、同様な
考え方に立って容易に適用できる。It should be noted that the present invention, diversity reception of three or more branches,
Alternatively, diversity reception using a combining method such as a maximum ratio combining method or an equal gain combining method other than the selective combining method can be easily applied based on the same idea.
第１図は移動局における従来のダイバーシチ受信方式を
示すブロック図、第２図は移動通信における無線ゾーン
の構成を示す概念図、第2A図は移動通信における移動局
呼出し用の制御チャネルの信号構成を示した説明図、第
３図はダイバーシチ受信時と非ダイバーシチ受信時にお
いてビット誤り率を比較して示したグラフ、第４図は個
別送信と複局同時送信のそれぞれの場合をダイバーシチ
受信と非ダイバーシチ受信に分けてビット誤り率を示し
たグラフ、第５図は本発明の一実施例を示すブロック
図、である。 符号説明 １……ブランチ（１）のアンテナ、２……ブランチ
（１）の受信部、３……ブランチ（１）の受信レベル出
力信号、４……ブランチ（１）の復調信号、５……ブラ
ンチ（２）のアンテナ、６……ブランチ（２）の受信
部、７……ブランチ（２）の受信レベル出力信号、８…
…ブランチ（２）の復調信号、９……選択合成部、10…
…ダイバーシチ受信復調信号、11……無線制御局、13…
…タイムスロット発生回路、14……タイムスロット検出
回路。FIG. 1 is a block diagram showing a conventional diversity reception system in a mobile station, FIG. 2 is a conceptual diagram showing a configuration of a radio zone in mobile communication, and FIG. 2A is a signal configuration of a control channel for calling a mobile station in mobile communication. FIG. 3 is a graph showing bit error rates in comparison between diversity reception and non-diversity reception, and FIG. 4 shows individual transmission and multi-station simultaneous transmission respectively. FIG. 5 is a graph showing the bit error rate separately for diversity reception, and FIG. 5 is a block diagram showing an embodiment of the present invention. Reference numeral 1 ... Branch (1) antenna, 2 ... Branch (1) receiving section, 3 ... Branch (1) reception level output signal, 4 ... Branch (1) demodulation signal, 5 ... Branch (2) antenna, 6 ... Branch (2) receiver, 7 ... Branch (2) reception level output signal, 8 ...
... Branch (2) demodulated signal, 9 ... Selective combining section, 10 ...
… Diversity reception demodulation signal, 11 …… Radio control station, 13…
… Time slot generation circuit, 14 …… Time slot detection circuit.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 永田 清人 神奈川県横須賀市武１丁目2356番地 日本 電信電話公社横須賀電気通信研究所内 (72)発明者 中田 忠明 神奈川県横須賀市武１丁目2356番地 日本 電信電話公社横須賀電気通信研究所内 審査官 池田 敏行 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kiyoto Nagata 1, 2356 Take, Yokosuka City, Kanagawa Pref., Yokosuka Telecommunications Research Institute, Nippon Telegraph and Telephone Public Corporation (72) Tadaaki Nakata 1, 2356 Take, Yokosuka City, Kanagawa Japan Toshiyuki Ikeda, Examiner, Yokosuka Electro-Communications Laboratory, Telegraph and Telephone Public Corporation
Claims (1)
整数）の無線基地局を有し、各無線基地局の無線ゾーン
の何れかにいる移動局と無線基地局との間に、 Ｎ個の前記無線基地局が同期をとって同時に送信する期
間としての一つのタイムスロット（これを以下、同時送
信タイムスロットという）と、それに続き、各無線基地
局が相互に重なり合わないように時間的にずらして各々
単独に送信する期間（これを以下、個別タイムスロット
という）の集合としてのＮ個の個別タイムスロットと、
から成るフレーム構成が連続して繰り返される呼出し用
の制御チャネルが設定され、 かかる制御チャネルによる前記無線基地局からの送信
を、少なくとも２組の受信系統をもつ前記移動局により
受信し、前記両系統による受信信号を選択合成してダイ
バーシチ受信として受信するようにした移動局における
ダイバーシチ受信方式において、 全ての無線基地局が同時に送信する前記同時送信タイム
スロットでは、ダイバーシチ受信を停止して何れか一方
の受信系統による単独受信に切り換えて、他方の受信系
統に対する電力供給を停止する手段を前記移動局に備え
たことを特徴とする移動局におけるダイバーシチ受信方
式。1. A control zone having N (N is an integer of 1 or more) radio base stations in one control zone, and between a mobile station and a radio base station in any of the radio zones of each radio base station. In addition, one time slot (hereinafter referred to as a simultaneous transmission time slot) as a period in which the N radio base stations transmit at the same time in synchronization with each other, and subsequently, the radio base stations do not overlap each other. N individual timeslots as a set of time periods (hereinafter referred to as individual timeslots) to be transmitted independently by shifting in time,
A control channel for paging in which the frame structure consisting of is continuously repeated is set, and a transmission from the radio base station on the control channel is received by the mobile station having at least two sets of reception systems, In the diversity reception method in the mobile station, which is configured to selectively combine the received signals according to to receive as diversity reception, in the simultaneous transmission time slot in which all the radio base stations simultaneously transmit, diversity reception is stopped and either one of them is stopped. A diversity reception system in a mobile station, characterized in that the mobile station is provided with means for switching to single reception by the reception system and stopping power supply to the other reception system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58159081A JPH0666722B2 (en) | 1983-09-01 | 1983-09-01 | Diversity reception method in mobile station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58159081A JPH0666722B2 (en) | 1983-09-01 | 1983-09-01 | Diversity reception method in mobile station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6052132A JPS6052132A (en) | 1985-03-25 |
| JPH0666722B2 true JPH0666722B2 (en) | 1994-08-24 |
Family
ID=15685805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58159081A Expired - Lifetime JPH0666722B2 (en) | 1983-09-01 | 1983-09-01 | Diversity reception method in mobile station |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666722B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007515850A (en) * | 2003-06-10 | 2007-06-14 | モトローラ・インコーポレイテッド | Diversity control in wireless communication devices and methods |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510431Y2 (en) * | 1985-07-26 | 1993-03-15 | ||
| US4823398A (en) * | 1985-12-23 | 1989-04-18 | Kazuya Hashimoto | Diversity receiver |
| JPH0744493B2 (en) * | 1987-06-30 | 1995-05-15 | 日本電気株式会社 | 1 + 1 Frequency Diversity Radio Transmitter / Receiver for Fixed Communication |
| JPH04334212A (en) * | 1991-05-10 | 1992-11-20 | Matsushita Electric Ind Co Ltd | Low power consumption type demodulator |
| JP3109595B2 (en) | 1998-08-28 | 2000-11-20 | 日本電気株式会社 | Receive diversity control method and diversity receiver |
| KR100698654B1 (en) | 2005-01-04 | 2007-03-23 | 주식회사 팬택앤큐리텔 | Power saving method using diversity of received RF signal and Mobile communication terminal thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780835A (en) * | 1980-11-06 | 1982-05-20 | Fujitsu Ltd | Diversity receiving system |
-
1983
- 1983-09-01 JP JP58159081A patent/JPH0666722B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780835A (en) * | 1980-11-06 | 1982-05-20 | Fujitsu Ltd | Diversity receiving system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007515850A (en) * | 2003-06-10 | 2007-06-14 | モトローラ・インコーポレイテッド | Diversity control in wireless communication devices and methods |
| JP4820951B2 (en) * | 2003-06-10 | 2011-11-24 | モトローラ モビリティ インコーポレイテッド | Diversity control in wireless communication devices and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6052132A (en) | 1985-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU712944B2 (en) | Diversity gain controlled cell-site transmission to prevent traffic signals from propogating beyond reachable extent of control signals | |
| JP2520115B2 (en) | Burst mode two-way wireless communication system | |
| JP4383675B2 (en) | Method and apparatus for controlling variable and fixed rate of forward link in mobile radio communication system | |
| US5161252A (en) | Diversity antenna communication system | |
| US6574461B1 (en) | Balanced diversity | |
| KR920003687A (en) | Mobile wireless communication system | |
| DK0767994T3 (en) | Digital communication system | |
| DE60211217D1 (en) | TIME DIVERSITY COMBINATION TO INCREASE THE RELIABILITY OF IEEE 802.11 WLAN RECEIVERS | |
| PL164583B1 (en) | Method for and system for especially separated telecomunication | |
| WO1997023065A3 (en) | Satellite diversity scheme | |
| US5574989A (en) | Time division multiple access cellular communication system and method employing base station diversity transmission | |
| FI103160B (en) | Measurement at parallel frequencies in radio communications equipment | |
| KR920003686A (en) | Wireless communication | |
| JPH10503891A (en) | Method and base station for improving connection quality in a cellular radio system | |
| JPH0666722B2 (en) | Diversity reception method in mobile station | |
| KR970024667A (en) | A radiotelephone apparatus that performs spatial diversity reception to communicate with a base station using a TDMA wireless communication method. | |
| CN1130857C (en) | High power short message service using TDMA frames | |
| JPH02200018A (en) | Diversity branch switching control system | |
| JPH07245577A (en) | Diversity communication equipment | |
| JP2954186B1 (en) | Power consumption control method and system in wireless base station | |
| JP3185721B2 (en) | Mobile communication device | |
| JPH07212816A (en) | Diversity communication equipment | |
| WO1999017573A1 (en) | A method and arrangement for generation of cell relations in a mobile communications system | |
| JP2000049683A5 (en) | ||
| JPS601931A (en) | Receiver for scpc communication |