JP2000004177A - Radio station identifying device - Google Patents
Radio station identifying deviceInfo
- Publication number
- JP2000004177A JP2000004177A JP10168870A JP16887098A JP2000004177A JP 2000004177 A JP2000004177 A JP 2000004177A JP 10168870 A JP10168870 A JP 10168870A JP 16887098 A JP16887098 A JP 16887098A JP 2000004177 A JP2000004177 A JP 2000004177A
- Authority
- JP
- Japan
- Prior art keywords
- frequency offset
- signal
- station
- frequency
- radio station
- 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
-
- 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
- Transceivers (AREA)
- Circuits Of Receivers In General (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、通信装置の受信
回路において、受信信号を送信した無線局を識別する回
路に係わり、特に受信信号を復調することなく無線局を
識別する無線局識別装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for identifying a wireless station that has transmitted a received signal in a receiving circuit of a communication apparatus, and more particularly to a wireless station identifying apparatus for identifying a wireless station without demodulating the received signal. Things.
【０００２】[0002]
【従来の技術】一つの基地局と複数の端末局で構成され
た無線システムにおいては、一般に、通信が基地局と端
末局との間で行われ、端末局間での通信はあまり行われ
ない。そこで、端末局は基地局からの信号が送られてき
たときにのみ受信動作を行うようにすれば、消費電力を
削減することができる。特に、携帯端末などは電池で動
作させることが多いので、消費電力の削減が望まれる。
一方、基地局からの信号のみを受信する方式としては、
基地局の送信周波数と端末局の送信周波数を分けて伝送
する周波数分割多重（ＦＤＤ）方式や、一つの周波数を
用いて受信信号を復調せずに基地局と端末局の識別をす
るために、予め決められたスケジュールに基づいて送受
信を行う時分割多重（ＴＤＤ）方式がある。2. Description of the Related Art In a radio system composed of one base station and a plurality of terminal stations, generally, communication is performed between the base station and the terminal station, and communication between the terminal stations is rarely performed. . Therefore, if the terminal station performs a receiving operation only when a signal is transmitted from the base station, power consumption can be reduced. In particular, since mobile terminals and the like are often operated with batteries, reduction of power consumption is desired.
On the other hand, as a method of receiving only the signal from the base station,
In order to distinguish between a base station and a terminal station without demodulating a received signal using one frequency, or a frequency division multiplexing (FDD) system in which a transmission frequency of a base station and a transmission frequency of a terminal station are transmitted separately. There is a time division multiplexing (TDD) system in which transmission and reception are performed based on a predetermined schedule.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記の
ような周波数分割多重方式による双方向通信では、使用
頻度の少ない端末局にもチャネルが割り当てられるた
め、システム全体としての周波数利用効率が下がってし
まうという課題があり、一方、時分割多重方式による双
方向通信では送受信のタイミング制御が複雑になるとと
もに、送受信のデータ伝送比率が頻繁に変化する状況で
は、伝送効率が低下してしまうという課題があった。However, in the above-described two-way communication using the frequency division multiplexing method, a channel is allocated to a terminal station that is used less frequently, so that the frequency utilization efficiency of the entire system decreases. On the other hand, in the two-way communication by the time division multiplexing method, the timing control of transmission and reception becomes complicated, and the transmission efficiency is reduced when the data transmission ratio of transmission and reception changes frequently. Was.
【０００４】この発明は、前記のような課題を解消する
ものであり、周波数利用効率およびデータ伝送効率の低
下を防ぎ、これにより、システム全体の性能を向上さ
せ、かつ消費電力の削減を図ることができる無線局識別
装置を得ることを目的とする。SUMMARY OF THE INVENTION [0004] The present invention solves the above-mentioned problems, and prevents a decrease in frequency use efficiency and data transmission efficiency, thereby improving the performance of the entire system and reducing power consumption. It is an object of the present invention to obtain a radio station identification device capable of performing the above.
【０００５】[0005]
【課題を解決するための手段】前記目的達成のため、請
求項１の発明にかかる無線局識別装置は、受信回路に受
信信号の周波数オフセットを検出する周波数オフセット
検出部を設け、該周波数オフセット検出部で検出した周
波数オフセットを使用して、信号を送信した無線局を識
別するようにしたものである。According to a first aspect of the present invention, there is provided a radio station identification apparatus comprising: a receiving circuit provided with a frequency offset detecting section for detecting a frequency offset of a received signal; The radio station that transmitted the signal is identified using the frequency offset detected by the section.
【０００６】また、請求項２の発明にかかる無線局識別
装置は、受信回路に受信信号の周波数オフセットを検出
する周波数オフセット検出部を設け、該周波数オフセッ
ト検出部で検出した周波数オフセットが、記憶装置に記
憶させてある許容周波数オフセットの範囲内にあるとき
の受信信号を、受信を希望する相手無線局からの信号で
あると識別するようにしたものである。According to a second aspect of the present invention, there is provided a radio station identification apparatus, wherein a receiving circuit is provided with a frequency offset detecting section for detecting a frequency offset of a received signal, and the frequency offset detected by the frequency offset detecting section is stored in a storage device. The received signal when it is within the range of the allowable frequency offset stored therein is identified as a signal from a partner radio station that desires reception.
【０００７】また、請求項３の発明にかかる無線局識別
装置は、コンパレータを設けて、これに前記周波数オフ
セット検出部で検出した周波数オフセットと前記記憶装
置に記憶された許容周波数オフセットとを比較すること
によって前記無線局の識別を行わせるようにしたもので
ある。A radio station identification device according to a third aspect of the present invention is provided with a comparator, which compares the frequency offset detected by the frequency offset detection section with the allowable frequency offset stored in the storage device. In this way, the wireless station is identified.
【０００８】また、請求項４の発明にかかる無線局識別
装置は、復調請求項部を設けて、これに前記周波数オフ
セット部で検出した周波数オフセットが、前記記憶装置
に記憶された許容周波数オフセットの範囲内にある場合
のみ、受信信号の復調動作を可能とするように復調回路
を制御させるようにしたものである。A radio station identification apparatus according to a fourth aspect of the present invention is provided with a demodulation claim section, in which the frequency offset detected by the frequency offset section is equal to the allowable frequency offset stored in the storage device. Only when it is within the range, the demodulation circuit is controlled to enable the demodulation operation of the received signal.
【０００９】また、請求項５の発明にかかる無線局識別
装置は、基地局の無線局からの送信信号の周波数オフセ
ット量の変動範囲と、端末局の無線局からの送信信号の
周波数オフセット量の変動範囲が重複しないようにした
ものである。A radio station identification apparatus according to a fifth aspect of the present invention is a radio station identification apparatus, comprising: a variation range of a frequency offset amount of a transmission signal from a base station radio station; The variation ranges do not overlap.
【００１０】[0010]
【発明の実施の形態】以下、この発明の実施の一形態を
図について説明する。図１はこの発明の無線局識別装置
を示すブロック図であり、同図において、１１は受信回
路に設けられて、受信信号の周波数オフセットを検出す
る周波数オフセット検出部、１２は受信すべき無線局の
許容周波数オフセット量を記憶する記憶装置、１３は周
波数オフセット検出部１１と記憶装置１２の出力を比較
するコンパレーター、１４はコンパレーター１３の出力
により、復調回路へ復調制御信号を出力する復調制御部
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a radio station identification apparatus according to the present invention. In FIG. 1, reference numeral 11 denotes a frequency offset detection unit provided in a reception circuit for detecting a frequency offset of a reception signal, and 12 denotes a radio station to be received. , A comparator for comparing the output of the frequency offset detector 11 with the output of the storage device 12, and 14 a demodulation control for outputting a demodulation control signal to the demodulation circuit based on the output of the comparator 13. Department.
【００１１】次に動作を説明する。図２に示すように、
いま、無線局２１の送信周波数をＦ０とし、無線局２２
の送信周波数をＦ１とし、無線局２３の送信周波数をＦ
２とする。また、無線局２１は無線局２２からの信号の
み受信するものとする。Next, the operation will be described. As shown in FIG.
Now, assume that the transmission frequency of the wireless station 21 is F0,
Is F1 and the transmission frequency of the wireless station 23 is F1.
Let it be 2. It is assumed that the wireless station 21 receives only a signal from the wireless station 22.
【００１２】このとき、無線局２１と無線局２２，２３
との間の送信および受信周波数のずれ（周波数オフセッ
ト）は、図３に示すようにΔｆ１＝Ｆ０−Ｆ１、Δｆ２
＝Ｆ０−Ｆ２、Δｆ１≠Δｆ２である。また、ここで、
それぞれの無線局２１，２２，２３の送信周波数および
受信周波数の変動量δは、｜Δｆ１−Δｆ２｜／４より
小さいものとする。無線局２１では信号を受信したとき
に、まずその信号の一部（プリアンブル信号など）を用
いて、信号の周波数オフセット検出部１１で周波数オフ
セットを検出する。その周波数オフセットの値と、記憶
装置１２に記憶されているΔｆ１との差が許容範囲内で
あれば、無線局２２からの信号であるとコンパレータ１
３で判断し、復調回路が復調を開始するように、復調制
御部１４から制御信号が出力される。At this time, the wireless station 21 and the wireless stations 22 and 23
The transmission and reception frequency shifts (frequency offsets) between Δf1 = F0−F1, Δf2 as shown in FIG.
= F0-F2, Δf1 ≠ Δf2. Also, where
It is assumed that the variation δ of the transmission frequency and the reception frequency of each of the wireless stations 21, 22, 23 is smaller than | Δf1−Δf2 | / 4. When the radio station 21 receives a signal, the frequency offset detection unit 11 of the signal first detects a frequency offset using a part of the signal (such as a preamble signal). If the difference between the value of the frequency offset and Δf1 stored in the storage device 12 is within an allowable range, the comparator 1 determines that the signal is from the wireless station 22.
The control signal is output from the demodulation control unit 14 so that the judgment is made in 3 and the demodulation circuit starts demodulation.
【００１３】また、無線局２１の周波数オフセット検出
器で受信した信号の周波数オフセットと、記憶装置１２
からのΔｆ１の周波数のずれが許容範囲を超えているな
らば、無線局２２の信号ではないとの判定結果が復調制
御部１４へ入力され、このため、復調回路は動作しな
い。このように、受信信号の周波数オフセットの大きさ
に応じて、受信信号を復調することなく、無線局の識別
ができる。The frequency offset of the signal received by the frequency offset detector of the radio station 21 is stored in the storage device 12.
If the deviation of the frequency Δf1 from the frequency exceeds the allowable range, a determination result that the signal is not a signal of the wireless station 22 is input to the demodulation control unit 14, and the demodulation circuit does not operate. In this manner, the radio station can be identified according to the magnitude of the frequency offset of the received signal without demodulating the received signal.
【００１４】図４はこの発明の実施の他の形態を示す基
地局−端末型の無線システムを示す構成図であり、ここ
では基地局４１と二つの端末局４２，４３が図示のよう
に配置されている。この実施の形態では、端末局４２お
よび端末局４３が、基地局４１からの信号のみ受信する
ものとし、図５に示すように、基地局４１の送信周波数
および受信周波数を５．０００１００ＧＨｚ、例えば端
末局４２の送信周波数および受信周波数を５．０００３
５０ＧＨｚとし、それぞれの周波数の変動量を±５０Ｋ
Ｈｚとしてある。このとき、端末局４２から見た基地局
４１の周波数のずれは、図６（ａ），図６（ｂ）に示す
ように−１５０ＫＨｚから−３５０ＫＨｚの間で変動す
ることになる。また、端末局４２から見た端末局４３の
周波数のずれは、図７（ａ），図７（ｂ）に示すように
−１００ＫＨｚから＋１００ＫＨｚの間で変動すること
になる。FIG. 4 is a block diagram showing a base station-terminal type radio system according to another embodiment of the present invention. Here, a base station 41 and two terminal stations 42 and 43 are arranged as shown. Have been. In this embodiment, it is assumed that terminal station 42 and terminal station 43 receive only the signal from base station 41, and as shown in FIG. 5, the transmission frequency and the reception frequency of base station 41 are 5.000100 GHz, for example, The transmission frequency and the reception frequency of the station 42 are set to 5.0003.
50 GHz, and the variation of each frequency is ± 50K
Hz. At this time, the frequency shift of the base station 41 as viewed from the terminal station 42 varies between -150 KHz and -350 KHz as shown in FIGS. 6 (a) and 6 (b). Further, the frequency shift of the terminal station 43 viewed from the terminal station 42 varies between -100 KHz and +100 KHz as shown in FIGS. 7A and 7B.
【００１５】すなわち、端末局４２で受信された信号の
周波数オフセット量は、図８に示すように−１５０ＫＨ
ｚから−３５０ＫＨｚの範囲と、−１００ＫＨｚから＋
１００ＫＨｚの範囲の２種類が考えられるが、これら二
つの範囲は重なっていないため、端末局４２において基
地局４１の信号として受信すべき周波数オフセットの範
囲である許容周波数オフセット範囲−３５０ＫＨｚから
−１５０ＫＨｚを記憶装置８１２に設定し、受信時にこ
の値と比較すれば、基地局４１からの信号であるかどう
かが識別できる。このように、基地局４１からの送信信
号の周波数オフセット量の変動範囲と端末局４３からの
送信信号の周波数オフセット量の変動範囲が重複しない
ことが、必須条件である。That is, the frequency offset amount of the signal received by the terminal station 42 is -150 KH as shown in FIG.
range from z to -350 KHz and from -100 KHz to +
Although two types of the range of 100 KHz are conceivable, since these two ranges do not overlap, the allowable frequency offset range -350 KHz to -150 KHz, which is the range of the frequency offset to be received as a signal of the base station 41 in the terminal station 42, is set. If the signal is set in the storage device 812 and compared with this value at the time of reception, it can be identified whether or not the signal is from the base station 41. Thus, it is an essential condition that the fluctuation range of the frequency offset amount of the transmission signal from the base station 41 and the fluctuation range of the frequency offset amount of the transmission signal from the terminal station 43 do not overlap.
【００１６】この条件を満たすためには、基地局４１の
送信周波数をＦ０、端末局４２，４３３の送信周波数を
Ｆ１、それぞれの周波数の変動量を±δとした場合、｜
Ｆ０−Ｆ１｜＞４δを満足するように設定すればよい。
また、この場合、端末局４２または端末局４３が受信す
る基地局信号周波数オフセット範囲ΔＦは、ΔＦ＝Ｆ１
−Ｆ０±２δとなる。In order to satisfy this condition, if the transmission frequency of the base station 41 is F0, the transmission frequencies of the terminal stations 42 and 433 are F1, and the variation of each frequency is ± δ, |
It may be set so as to satisfy F0−F1 |> 4δ.
In this case, the base station signal frequency offset range ΔF received by the terminal station 42 or the terminal station 43 is ΔF = F1
−F0 ± 2δ.
【００１７】次に、実際に信号が受信された場合の手順
について、図９に示す端末局４２の受信回路を用いて説
明する。まず、受信信号がキャリア検出回路８で検出さ
れると、周波数オフセット補正部８３と復調回路８４は
動作せずに、受信信号は無線局識別装置８２へ入力され
る。このため、無線局識別装置８２の周波数オフセット
検出部８１１においては、受信信号のプリアンブルから
受信信号の周波数オフセットが検出される。そこで、コ
ンパレータ８１３において、その検出結果と記憶装置８
１２に設定された許容周波数オフセットとの比較がなさ
れ、図８の−３５０ＫＨｚ〜−１５０ＫＨｚの許容周波
数オフセット範囲であると判断されれば、復調制御部８
１４は受信信号が基地局４１からのものであると識別し
て、周波数オフセット補正部８３と復調回路８４に対し
て、受信信号の復調を開始するような制御信号を出力す
る。検出された結果が図８の−１００ＫＨｚ〜＋１００
ＫＨｚのような周波数オフセット範囲であれば、他の無
線局からの信号と判断して、復調動作は行われない。す
なわち、端末局４２において、基地局４１からの信号だ
ということが識別された時のみ、信号の復調を開始する
ことが可能となる。Next, the procedure when a signal is actually received will be described using the receiving circuit of the terminal station 42 shown in FIG. First, when a received signal is detected by the carrier detection circuit 8, the received signal is input to the radio station identification device 82 without operating the frequency offset correction unit 83 and the demodulation circuit 84. Therefore, the frequency offset detector 811 of the wireless station identification device 82 detects the frequency offset of the received signal from the preamble of the received signal. Therefore, in the comparator 813, the detection result is stored in the storage device 8
12 is compared with the allowable frequency offset set in FIG. 12, and if it is determined that the allowable frequency offset is in the range of −350 KHz to −150 KHz in FIG.
Reference numeral 14 identifies that the received signal is from the base station 41, and outputs a control signal to the frequency offset correction unit 83 and the demodulation circuit 84 to start demodulation of the received signal. The detected result is -100 KHz to +100 in FIG.
If it is within the frequency offset range such as KHz, it is determined that the signal is from another wireless station, and the demodulation operation is not performed. That is, signal demodulation can be started only when the terminal station 42 identifies that the signal is from the base station 41.
【００１８】図１０はこの発明の実施の別の形態を示
す。この図１０は四つの無線局９１，９２，９３，９４
間で通信を行う場合を示し、図１１にも示すように、無
線局９１の送信周波数および受信周波数を１．００００
２０ＧＨｚとし、無線局９２の送信周波数および受信周
波数を１．００００７０ＧＨｚとし、無線局９３の送信
周波数および受信周波数を１．０００１２０ＧＨｚと
し、無線局９４の送信周波数および受信周波数を１．０
００１７０ＧＨｚとする。そして、それぞれの周波数の
変動量を±１０ＫＨｚとする。このとき、各無線局９１
から見た他局の周波数オフセットは、図１２（ａ），
（ｂ），（ｃ），（ｄ）に示すようになる。それぞれの
無線局９１〜９４で他局の周波数オフセットが重複する
範囲はないので、周波数オフセットの許容範囲を図１２
のようにそれぞれ設定すれば、前記の場合と同様に、他
局からの信号を識別した後に、復調を行うことが可能で
ある。つまり、無線局の識別が行えることになる。FIG. 10 shows another embodiment of the present invention. FIG. 10 shows four radio stations 91, 92, 93, 94.
FIG. 11 shows a case in which the transmission frequency and the reception frequency of the wireless station 91 are 1.0000.
20 GHz, the transmission frequency and the reception frequency of the radio station 92 are set to 1.00070 GHz, the transmission frequency and the reception frequency of the radio station 93 are set to 1.000120 GHz, and the transmission frequency and the reception frequency of the radio station 94 are set to 1.0 GHz.
Let it be 00170 GHz. Then, the variation of each frequency is ± 10 KHz. At this time, each wireless station 91
12 (a), the frequency offset of the other station viewed from FIG.
(B), (c) and (d) are obtained. Since there is no range in which the frequency offsets of the other stations overlap in each of the wireless stations 91 to 94, the allowable range of the frequency offset is shown in FIG.
In the same manner as described above, it is possible to perform demodulation after identifying a signal from another station. That is, identification of a wireless station can be performed.
【００１９】[0019]
【発明の効果】以上のように、この発明によれば、プリ
アンブル信号を受信した段階で、周波数オフセット検出
部を用いて周波数オフセットの検出を行うようにしたの
で、従来のように消費電力が比較的大きい復調演算を行
わずに受信信号を識別することができ、従って、不必要
な信号が受信されたときは以降の受信処理を停止し、電
力消費を押さえることができるという効果が得られる。
特に、携帯端末のように、ほとんどの場合が基地局との
み通信を行うような状況では、他の端末局の信号は復調
を行わずにプリアンブル部の一部のみの受信で識別でき
るので、電力消費を大幅に押さえることができ、実用上
極めて有益である。As described above, according to the present invention, when a preamble signal is received, the frequency offset is detected by using the frequency offset detector, so that the power consumption can be compared with the conventional one. The received signal can be identified without performing a demodulation operation that is too large, so that when an unnecessary signal is received, the subsequent reception processing is stopped, and the power consumption can be suppressed.
In particular, in most cases, such as mobile terminals, in which communication is performed only with the base station, signals from other terminal stations can be identified by receiving only a part of the preamble part without demodulation, so that power consumption is reduced. The consumption can be greatly reduced, which is extremely useful in practice.
【００２０】また、周波数分割多重方式のように使用頻
度の少ない端末局にもチャネルを割り当てるといった周
波数の利用効率の悪い通信を回避できるとともに、時分
割多重方式のように、送受信タイミング制御の複雑化に
伴う伝送効率の低下といった問題の発生も回避できるこ
ととなる。Further, it is possible to avoid inefficient communication of frequency utilization such as allocating a channel to a terminal station which is not frequently used as in the frequency division multiplexing system, and to complicate transmission / reception timing control as in the time division multiplexing system. Therefore, it is possible to avoid the occurrence of a problem such as a decrease in transmission efficiency due to this.
【図１】 この発明の実施の一形態による無線局識別装
置を示すブロック図である。FIG. 1 is a block diagram showing a wireless station identification device according to an embodiment of the present invention.
【図２】 図１に示す無線局識別装置を持った複数の無
線局からなる無線システムの構成図である。FIG. 2 is a configuration diagram of a wireless system including a plurality of wireless stations having the wireless station identification device shown in FIG.
【図３】 図２に示す各無線局の無線周波数を示す説明
図である。FIG. 3 is an explanatory diagram showing a radio frequency of each radio station shown in FIG. 2;
【図４】 この発明の実施の他の形態による無線システ
ムを示す構成図である。FIG. 4 is a configuration diagram showing a wireless system according to another embodiment of the present invention.
【図５】 図４における基地局と端末局の送信周波数を
示す説明図である。FIG. 5 is an explanatory diagram showing transmission frequencies of a base station and a terminal station in FIG.
【図６】 図４における基地局および端末局相互の周波
数のずれの変動状況を示す説明図である。FIG. 6 is an explanatory diagram showing a variation state of a frequency shift between a base station and a terminal station in FIG. 4;
【図７】 図４における端末局相互の周波数のずれの変
動状況を示す説明図である。FIG. 7 is an explanatory diagram showing a variation situation of a frequency shift between terminal stations in FIG. 4;
【図８】 図４に示す端末局で受信される周波数オフセ
ットを示す説明図である。FIG. 8 is an explanatory diagram showing a frequency offset received by the terminal station shown in FIG.
【図９】 この発明の実施の他の形態による無線局識別
装置を示すブロック図である。FIG. 9 is a block diagram showing a radio station identification device according to another embodiment of the present invention.
【図１０】 この発明の実施の他の無線システムを示す
構成図である。FIG. 10 is a configuration diagram showing another wireless system according to an embodiment of the present invention.
【図１１】 図１０に示す各無線局の無線周波数を示す
説明図である。FIG. 11 is an explanatory diagram showing radio frequencies of each radio station shown in FIG.
【図１２】 図１０に示す無線局で受信される信号の周
波数オフセットを示す説明図である。12 is an explanatory diagram illustrating a frequency offset of a signal received by the wireless station illustrated in FIG.
１１，８１１ 周波数オフセット検出部 １２，８１２ 記憶装置 １３，８１３ コンパレータ １４，８１４ 復調制御部 ２１〜２３，９１〜９４ 無線局 11, 811 Frequency offset detection unit 12, 812 Storage device 13, 813 Comparator 14, 814 Demodulation control unit 21 to 23, 91 to 94 Wireless station
Claims (5)
を検出する周波数オフセット検出部を設け、該周波数オ
フセット検出部で検出した周波数オフセットを使用し
て、信号を送信した無線局を識別することを特徴とする
無線局識別装置。1. A receiving circuit, comprising: a frequency offset detecting section for detecting a frequency offset of a received signal; and using the frequency offset detected by the frequency offset detecting section, a radio station transmitting the signal is identified. Wireless station identification device.
を検出する周波数オフセット検出部を設け、該周波数オ
フセット検出部で検出した周波数オフセットが、記憶装
置に記憶させてある許容周波数オフセットの範囲内にあ
るときの受信信号を、受信を希望する相手無線局からの
信号であると識別する請求項１に記載の無線局識別装
置。2. A receiving circuit comprising a frequency offset detecting section for detecting a frequency offset of a received signal, wherein the frequency offset detected by the frequency offset detecting section is within a range of an allowable frequency offset stored in a storage device. 2. The radio station identification device according to claim 1, wherein the received signal at that time is identified as a signal from a partner radio station that desires reception.
周波数オフセットと前記記憶装置に記憶された許容周波
数オフセットとを比較することによって前記無線局の識
別を行うコンパレータを設けたことを特徴とする請求項
２に記載の無線局識別装置。3. A comparator for identifying the radio station by comparing a frequency offset detected by the frequency offset detection unit with an allowable frequency offset stored in the storage device. 3. The wireless station identification device according to 2.
数オフセットが、前記記憶装置に記憶された許容周波数
オフセットの範囲内にある場合のみ、受信信号の復調動
作を可能とするように復調回路を制御する復調制御部を
設けたことを特徴とする請求項２または３に記載の無線
局識別装置。4. A demodulation circuit is controlled so that a received signal can be demodulated only when a frequency offset detected by the frequency offset section is within a range of an allowable frequency offset stored in the storage device. The radio station identification device according to claim 2 or 3, further comprising a demodulation control unit.
オフセット量の変動範囲と、端末局の無線局からの送信
信号の周波数オフセット量の変動範囲が重複しないよう
にしたことを特徴とする請求項１〜４のいずれかに記載
の無線局識別装置。5. The method according to claim 1, wherein the variation range of the frequency offset amount of the transmission signal from the radio station of the base station and the variation range of the frequency offset amount of the transmission signal from the radio station of the terminal station do not overlap. The wireless station identification device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10168870A JP3132472B2 (en) | 1998-06-16 | 1998-06-16 | Radio station identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10168870A JP3132472B2 (en) | 1998-06-16 | 1998-06-16 | Radio station identification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000004177A true JP2000004177A (en) | 2000-01-07 |
| JP3132472B2 JP3132472B2 (en) | 2001-02-05 |
Family
ID=15876100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10168870A Expired - Fee Related JP3132472B2 (en) | 1998-06-16 | 1998-06-16 | Radio station identification device |
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| Country | Link |
|---|---|
| JP (1) | JP3132472B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002054627A1 (en) * | 2000-12-27 | 2002-07-11 | Sanyo Electric Co., Ltd. | Radio apparatus, swap detecting method and swap detecting program |
| JP2004511124A (en) * | 2000-09-29 | 2004-04-08 | アレイコム・インコーポレーテッド | Method and apparatus for separating multiple users in a shared channel communication system |
| US7088974B2 (en) | 2000-12-20 | 2006-08-08 | Nec Corporation | Mobile station capable of performing automatic frequency control based on correspondence of frequency error and TCXO control voltage to base station |
| JP2015154351A (en) * | 2014-02-17 | 2015-08-24 | 沖電気工業株式会社 | Communication device, communication system and communication method |
| CN108037375A (en) * | 2017-12-28 | 2018-05-15 | 金卡智能集团股份有限公司 | Frequency deviation test method for device antenna |
-
1998
- 1998-06-16 JP JP10168870A patent/JP3132472B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004511124A (en) * | 2000-09-29 | 2004-04-08 | アレイコム・インコーポレーテッド | Method and apparatus for separating multiple users in a shared channel communication system |
| US7088974B2 (en) | 2000-12-20 | 2006-08-08 | Nec Corporation | Mobile station capable of performing automatic frequency control based on correspondence of frequency error and TCXO control voltage to base station |
| WO2002054627A1 (en) * | 2000-12-27 | 2002-07-11 | Sanyo Electric Co., Ltd. | Radio apparatus, swap detecting method and swap detecting program |
| US7269202B2 (en) | 2000-12-27 | 2007-09-11 | Sanyo Electric Co., Ltd. | Radio apparatus, swap detecting method and swap detecting program |
| JP2015154351A (en) * | 2014-02-17 | 2015-08-24 | 沖電気工業株式会社 | Communication device, communication system and communication method |
| CN108037375A (en) * | 2017-12-28 | 2018-05-15 | 金卡智能集团股份有限公司 | Frequency deviation test method for device antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3132472B2 (en) | 2001-02-05 |
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