JP2003207557A - Mobile station and movable body communication system - Google Patents
Mobile station and movable body communication systemInfo
- Publication number
- JP2003207557A JP2003207557A JP2002003476A JP2002003476A JP2003207557A JP 2003207557 A JP2003207557 A JP 2003207557A JP 2002003476 A JP2002003476 A JP 2002003476A JP 2002003476 A JP2002003476 A JP 2002003476A JP 2003207557 A JP2003207557 A JP 2003207557A
- Authority
- JP
- Japan
- Prior art keywords
- distance
- self
- phase difference
- signals
- distance measuring
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は歩行者や車両などの
移動局の位置を移動局側にて検出する移動局位置検出装
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 mobile station position detecting device for detecting the position of a mobile station such as a pedestrian or a vehicle on the side of the mobile station.
【０００２】[0002]
【従来の技術】移動局の自己位置を検出する方式として
は、代表的なものとしてＧＰＳ（Ｇｌｏｂａｌ Ｐｏｓ
ｉｔｉｏｎｉｎｇ Ｓｙｓｔｅｍ）測位装置がある。こ
れは地球を周回する軌道上の複数のＧＰＳ衛星から送信
されるマイクロ波の測距信号を移動局で受信し、各衛星
間との距離を算出する。この各衛星間との距離により三
次元的な自己位置を検出する。その他の方式として、携
帯電話、ＰＨＳのゾーン検出による位置検出方式なども
ある。2. Description of the Related Art A typical method for detecting the self-position of a mobile station is GPS (Global Pos).
There is an positioning system. The mobile station receives microwave distance measurement signals transmitted from a plurality of GPS satellites on an orbit that orbits the earth, and calculates the distances between the satellites. The three-dimensional self-position is detected from the distance between the satellites. Other methods include a mobile phone and a position detection method based on PHS zone detection.
【０００３】ＧＰＳ測位装置について説明する。ＧＰＳ
衛星は測距のための信号をＬ１帯（１５７５．４２ＭＨ
ｚ）、Ｌ２帯（１２２７．６ＭＨｚ）の２周波の搬送波
を２相位相変調して送信している。測距信号にはＣ／Ａ
コード、Ｐコードと呼ばれるものがあり、Ｃ／Ａコード
はＬ１帯に載せられ送信されており、一般的に使用され
ている。Ｐコードは従来、米軍関係者のみが使用できる
軍用コードとされておりＬ１、Ｌ２帯を使用して送信さ
れている。Ｃ／Ａコードのビットレートは１．０２３Ｍ
ｂｐｓであり、Ｐコードのビットレートは１０．２３Ｍ
ｂｐｓである。現在ではＰコード自体は公表されてお
り、Ｐコードと同一のクロックレートのＹコードが付加
され軍用コードとなっている。受信する移動局側では、
電波の伝搬時間及びコードに含まれる航法データにより
各衛星の時計誤差及びＸ，Ｙ，Ｚ座標を求める。未知数
が４つとなるため、自己位置を算出するためには４つの
衛星が必要となる。A GPS positioning device will be described. GPS
The satellite transmits signals for distance measurement to the L1 band (1575.42MH
z), L2 band (1227.6 MHz) two-frequency carrier waves are subjected to two-phase phase modulation and transmitted. C / A for ranging signals
There are codes called P codes and C / A codes are put on the L1 band and transmitted, and are generally used. Conventionally, the P-code is a military code that can be used only by US military personnel and is transmitted using the L1 and L2 bands. C / A code bit rate is 1.023M
bps, and the bit rate of the P code is 10.23M
bps. At present, the P code itself has been made public, and a Y code having the same clock rate as the P code is added to form a military code. On the receiving mobile station side,
The clock error and X, Y, Z coordinates of each satellite are obtained from the propagation time of the radio wave and the navigation data contained in the code. Since there are four unknowns, four satellites are required to calculate the self position.
【０００４】ＧＰＳ測位装置は、基本的に米国所有のも
のであり有事の際など米国の意図によって使用できなく
なる場合も考えられる。また、衛星電波の受信が前提で
あり、衛星が見通せない場所（室内、地下等）での位置
検出は不可能という問題点がある。[0004] The GPS positioning device is basically owned by the United States, and there is a possibility that it cannot be used due to the intention of the United States in an emergency. Further, there is a problem that the satellite radio wave is premised and the position cannot be detected in a place where the satellite cannot be seen (indoor, underground, etc.).
【０００５】ＧＰＳを使わない方法として、例えば、特
開平３−６４８０号公報に示された移動体の位置標定シ
ステムなどのように、３つの固定局よりそれぞれの所定
期間に同一の周波数の距離差を測定する信号を移動局に
送信し、移動局で位置の測定を行うものもある。As a method that does not use GPS, for example, as in the position locating system for a moving body disclosed in Japanese Patent Laid-Open No. 3-6480, the distance difference of the same frequency from each of three fixed stations in each predetermined period is used. There is also a method in which a signal for measuring is transmitted to a mobile station, and the mobile station measures the position.
【０００６】図８はこの位置標定システムの位置標定方
法を示す概念図である。１０１は親局、１０２は第一の
従局、１０３は第二の従局、１０４は移動局である。特
開平３−６４８０号公報では、親局１０１、第一の従局
１０２、第二の従局１０３の順に、所定の時間だけ空け
て移動局１０４に向けて同一周波数（例えば１０ＧＨ
ｚ）の距離測定信号を送信し、移動局１０４ではその各
距離測定信号同士の位相差から、各固定局間の距離差を
測定することで、図中ＩａおよびＩｂのような双曲線を
算出し、その交点を求めることで移動局１０４の位置を
測定するものである。FIG. 8 is a conceptual diagram showing a position locating method of this position locating system. Reference numeral 101 is a master station, 102 is a first slave station, 103 is a second slave station, and 104 is a mobile station. In Japanese Laid-Open Patent Publication No. 3-6480, the master station 101, the first slave station 102, and the second slave station 103 are sequentially arranged in the order of a predetermined time period toward the mobile station 104 at the same frequency (for example, 10 GHz).
The distance measurement signal of z) is transmitted, and the mobile station 104 calculates the hyperbola such as Ia and Ib in the figure by measuring the distance difference between the fixed stations from the phase difference between the distance measurement signals. , The position of the mobile station 104 is measured by obtaining the intersection.
【０００７】しかし、このような構成した位置標定シス
テムでは、高い周波数の距離測定信号を用いるが、図９
（ａ）に示したように、高周波数の信号はＡ／Ｄ変換す
る際のサンプリング誤差が大きく位置検出精度が上げら
れないという問題があった。このサンプリング誤差は、
図９（ｂ）に示したように低い周波数の（長波長の）信
号ならば、低く抑えることができるが、そのような低周
波数の電波は伝搬距離が短く実用に適さない。However, in the position locating system configured as described above, a distance measuring signal having a high frequency is used.
As shown in (a), there is a problem that a high-frequency signal has a large sampling error when A / D-converting and position detection accuracy cannot be improved. This sampling error is
As shown in FIG. 9B, a low frequency (long wavelength) signal can be suppressed to a low level, but such a low frequency radio wave has a short propagation distance and is not suitable for practical use.
【０００８】[0008]
【発明が解決しようとする課題】本発明では上記のよう
な問題点を解消するためになされたもので、ＧＰＳ衛星
を用いずに、精度良く自己位置を検出することができる
移動体端末を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and provides a mobile terminal capable of accurately detecting its own position without using GPS satellites. The purpose is to
【０００９】[0009]
【課題を解決するための手段】本発明に係わる移動体端
末は、固定局から無線送信される周波数の異なる２つの
距離測定信号を受信する受信手段と、前記受信手段で受
信した２つの距離測定信号の位相差を検出する位相差検
出手段と、前記位相差から自己と前記２つの距離測定信
号を送信した前記固定局との距離を測定する距離測定手
段と、３つの前記固定局と自己との距離から自己位置を
算出する自己位置算出手段とを備えるものである。A mobile terminal according to the present invention includes a receiving means for receiving two distance measuring signals of different frequencies wirelessly transmitted from a fixed station, and two distance measuring signals received by the receiving means. Phase difference detecting means for detecting a phase difference between signals, distance measuring means for measuring a distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference, three fixed stations and the self And a self-position calculating means for calculating the self-position from the distance.
【００１０】また、固定局から無線送信される周波数の
異なる２つの距離測定信号を受信し、中間周波数に変換
する受信手段と、前記受信手段で受信した２つの距離測
定信号の位相差を検出する位相差検出手段と、前記位相
差から自己と前記２つの距離測定信号を送信した前記固
定局との距離を測定する距離測定手段と、３つの前記固
定局と自己との距離から自己位置を算出する自己位置算
出手段とを備えるものである。Further, the phase difference between the receiving means for receiving two distance measuring signals of different frequencies wirelessly transmitted from the fixed station and converting them to an intermediate frequency and the phase difference between the two distance measuring signals received by the receiving means are detected. Phase difference detecting means, distance measuring means for measuring the distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference, and calculating the self-position from the distance between the three fixed stations and self. And a self-position calculating means for performing the operation.
【００１１】固定局から無線送信される２つの異なる直
接拡散された距離測定信号を受信し、受信した距離測定
信号に逆拡散を施す受信手段と、前記受信手段で受信し
た２つの距離測定信号の位相差を検出する位相差検出手
段と、前記位相差から自己と前記２つの距離測定信号を
送信した前記固定局との距離を測定する距離測定手段
と、３つの前記固定局と自己との距離から自己位置を算
出する自己位置算出手段とを備えるものである。The receiving means for receiving two different direct spread distance measurement signals wirelessly transmitted from the fixed station and despreading the received distance measurement signals, and the two distance measurement signals received by the receiving means. Phase difference detecting means for detecting a phase difference, distance measuring means for measuring the distance between itself and the fixed station that has transmitted the two distance measurement signals from the phase difference, and three distances between the fixed station and itself. And a self-position calculating means for calculating the self-position.
【００１２】固定局から無線送信される２つの異なる周
波数ホッピング変調された距離測定信号を受信し、受信
した距離測定信号を周波数ホッピング復調を行う受信手
段と、前記受信手段で受信した２つの距離測定信号の位
相差を検出する位相差検出手段と、前記位相差から自己
と前記２つの距離測定信号を送信した前記固定局との距
離を測定する距離測定手段と、３つの前記固定局と自己
との距離から自己位置を算出する自己位置算出手段とを
備えるものである。Receiving means for receiving two different frequency hopping-modulated distance measurement signals wirelessly transmitted from the fixed station, and frequency hopping demodulation of the received distance measurement signals, and two distance measurement signals received by the receiving means. Phase difference detecting means for detecting a phase difference between signals, distance measuring means for measuring a distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference, three fixed stations and the self And a self-position calculating means for calculating the self-position from the distance.
【００１３】また、本発明に係わる移動通信システム
は、周波数の異なる２つの距離測定信号を送信する固定
局と、前記固定局から無線送信される周波数の異なる２
つの距離測定信号を受信する受信手段と、前記受信手段
で受信した２つの距離測定信号の位相差を検出する位相
差検出手段と、前記位相差から自己と前記２つの距離測
定信号を送信した前記固定局との距離を測定する距離測
定手段と、３つの前記固定局と自己との距離から自己位
置を算出する自己位置算出手段とを備える移動局を備え
るものである。Further, the mobile communication system according to the present invention includes a fixed station which transmits two distance measurement signals having different frequencies, and a fixed station which wirelessly transmits from the fixed station.
Receiving means for receiving one distance measuring signal, phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means, and the self transmitting means for transmitting the two distance measuring signals from the phase difference. The mobile station is provided with a distance measuring means for measuring the distance to the fixed station and a self position calculating means for calculating the self position from the distances between the three fixed stations and the self.
【００１４】また、周波数の異なる２つの距離測定信号
を送信する固定局と、前記固定局から無線送信される周
波数の異なる２つの距離測定信号を受信し、中間周波数
に変換する受信手段と、前記受信手段で受信した２つの
距離測定信号の位相差を検出する位相差検出手段と、前
記位相差から自己と前記２つの距離測定信号を送信した
固定局との距離を測定する距離測定手段と、３つの前記
固定局と自己との距離から自己位置を算出する自己位置
算出手段とを備える移動局を備えるものである。Further, a fixed station for transmitting two distance measurement signals having different frequencies, a receiving means for receiving the two distance measurement signals of different frequencies wirelessly transmitted from the fixed station and converting them into an intermediate frequency, Phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means, and distance measuring means for measuring the distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference, The mobile station includes a self-position calculating unit that calculates a self-position from the distance between the three fixed stations and the self-station.
【００１５】また、２つの異なる直接拡散された距離測
定信号を送信する固定局と、固定局から無線送信される
２つの異なる直接拡散された距離測定信号を受信し、受
信した距離測定信号に逆拡散を施す受信手段と、前記受
信手段で受信した２つの距離測定信号の位相差を検出す
る位相差検出手段と、前記位相差から自己と前記２つの
距離測定信号を送信した前記固定局との距離を測定する
距離測定手段と、３つの前記固定局と自己との距離から
自己位置を算出する自己位置算出手段とを備える移動局
を備えるものである。Further, a fixed station that transmits two different directly spread distance measurement signals and two different directly spread distance measurement signals that are wirelessly transmitted from the fixed station are received, and the received distance measurement signals are reversed. The receiving means for spreading, the phase difference detecting means for detecting the phase difference between the two distance measurement signals received by the receiving means, the self and the fixed station for transmitting the two distance measurement signals from the phase difference. The mobile station includes a distance measuring unit that measures a distance and a self-position calculating unit that calculates a self-position from the distance between the fixed station and the self.
【００１６】また、２つの異なる周波数ホッピング変調
された距離測定信号を送信する固定局と、前記固定局か
ら無線送信される２つの異なる周波数ホッピング変調さ
れた距離測定信号を受信し、受信した距離測定信号を周
波数ホッピング復調を行う受信手段と、前記受信手段で
受信した２つの距離測定信号の位相差を検出する位相差
検出手段と、前記位相差から自己と前記２つの距離測定
信号を送信した前記固定局との距離を測定する距離測定
手段と、３つの前記固定局と自己との距離から自己位置
を算出する自己位置算出手段とを備える移動局を備える
ものである。Further, a fixed station that transmits two different frequency hopping-modulated distance measurement signals, and two different frequency hopping-modulated distance measurement signals wirelessly transmitted from the fixed station, and the received distance measurement. Receiving means for performing frequency hopping demodulation on the signal; phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means; and transmitting the self and the two distance measuring signals from the phase difference. The mobile station is provided with a distance measuring means for measuring the distance to the fixed station and a self position calculating means for calculating the self position from the distances between the three fixed stations and the self.
【００１７】実施の形態１．図１は本発明１の実施例を
示した図である。同図において１、２、３はそれぞれ固
定局Ａ，Ｂ，Ｃであり、それぞれ移動局４に向けてｆ
ａ１，ｆａ２、ｆｂ１、ｆｂ２、ｆｃ１、ｆｃ２を出力
する。Embodiment 1. FIG. 1 is a diagram showing an embodiment of the present invention 1. In the figure, reference numerals 1, 2, and 3 denote fixed stations A, B, and C, respectively.
It outputs a1 , f a2 , f b1 , f b2 , f c1 , and f c2 .
【００１８】次に動作について説明する。まず、例え
ば、固定局Ａから送信されるｆａ１、ｆａ２を以下とす
る。
ｆａ１＝Ａｓｉｎωａ１ｔ （１ａ）
ｆａ２＝Ａｓｉｎωａ２ｔ （１ｂ）
ここで、ｔは固定局から移動局までの電波伝搬時間であ
る。固定局Ａからｆａ１，ｆａ２を時刻０で位相を合わ
せ同時に送信開始すると移動局での受信時刻はｔとな
る。この時移動局受信時における位相差は
φ＝ωａ１ｔ−ωａ２ｔ （２）
固定局Ａと移動局間の距離をｒａとすると
ｒａ=（ωａ１t−ωａ２t）・λａ／2π （３）
ただし、λａ：波長（位相差の１波長）となる。Next, the operation will be described. First, for example, let f a1 and f a2 transmitted from the fixed station A be as follows. f a1 = Asin ω a1 t (1a) f a2 = Asin ω a2 t (1b) Here, t is the radio wave propagation time from the fixed station to the mobile station. When f a1 and f a2 from the fixed station A are aligned in phase at time 0 and transmission starts simultaneously, the reception time at the mobile station becomes t. Phase difference in this case the mobile station upon reception φ = ω a1 t-ω a2 t (2) the distance between the fixed station A and the mobile station when a r a r a = (ω a1 t-ω a2 t) · λ a / 2π (3) where λ a is the wavelength (one wavelength of the phase difference).
【００１９】つまりｆａ１，ｆａ２の周波数差の周波数
の位相により距離を求めることができる。図２に位相差
検出のイメージ図を示す。例えばｆａ１＝１０１ＭＨ
ｚ、ｆ ａ２＝１００ＭＨｚとするとｆａ１とｆａ２の周
波数差１ＭＨｚの位相により固定局から移動局までの伝
搬時間が算出でき、離隔距離を求めることができる。こ
の時、ｆａ１，ｆａ２の周波数差の位相により距離を求
めるため、距離ｒａにより位相が１回転しないような周
波数差を選定する必要がある。ｒａ＝３００ｍと仮定す
ると、１波長が３００ｍ以下の周波数差とする必要があ
る。That is, fa1, Fa2Frequency difference
The distance can be obtained by the phase of. Phase difference in Figure 2
The image figure of detection is shown. For example, fa1= 101 MH
z, f a2= 100MHz fa1And fa2Lap
Transmission from a fixed station to a mobile station by the phase of wave number difference 1MHz
The carrying time can be calculated, and the separation distance can be obtained. This
Then fa1, Fa2Find the distance by the phase of the frequency difference
Distance raSo that the phase does not rotate once
It is necessary to select the wave number difference. ra= 300m
Then, one wavelength needs to have a frequency difference of 300 m or less.
It
【００２０】このように、２つの信号の周波数差を利用
するため、高周波数の信号を用いながらも、低周波数の
信号をサンプリングすればよいため、サンプリング誤差
を低減することができ、距離測定の精度が上がる。As described above, since the frequency difference between the two signals is used, it is only necessary to sample the low frequency signal while using the high frequency signal. Therefore, it is possible to reduce the sampling error and to measure the distance. The accuracy increases.
【００２１】固定局と移動局間の距離が求まると、固定
局Ａ，Ｂ，Ｃの位置は既知のため、３次元測位により自
己位置を求めることができる。固定局Ａ，Ｂ，ＣをＡ
（Ｘａ，Ｙａ，Ｚａ）、Ｂ（Ｘｂ，Ｙｂ，Ｚｂ）、Ｃ
（Ｘｃ，Ｙｃ，Ｚｃ）とする。Ａ局をもとにして考える
と、座標による距離の関係式として以下の式が成り立
つ。
｛（Ｘａ−Ｘ０）２＋（Ｙａ−Ｙ０）２＋（Ｚａ−Ｚ０）２｝１／２＝ｒａ
（４）
各固定局についてこの式が成り立つため、これらの式か
ら逐次近似法を用いて近似式を求める。これらの計算は
ＧＰＳ測位装置で行っている計算と同様の要領となる。
この結果、移動局の自己位置である（Ｘ０，Ｙ０，
Ｚ０）を求めることができる。When the distance between the fixed station and the mobile station is obtained, the positions of the fixed stations A, B and C are known, so that the self position can be obtained by three-dimensional positioning. Fixed station A, B, C to A
(X a, Y a, Z a), B (X b, Y b, Z b), C
(X c , Y c , Z c ). Considering station A, the following equation holds as a relational expression of distance by coordinates. {(X a -X 0) 2 + (Y a -Y 0) 2 + (Z a -Z 0) 2} 1/2 = r a (4) Since this expression holds for each fixed station, these equations The approximate expression is obtained from the iterative approximation method. These calculations are similar to the calculations performed by the GPS positioning device.
As a result, the self position of the mobile station (X 0 , Y 0 ,
Z 0 ) can be obtained.
【００２２】図３に本発明の実施の形態１に係わる移動
体端末の要部を表すブロック図を示す。図において５
ａ、５ｂはアンテナ、６ａ、６ｂは低雑音アンプ（ＬＮ
Ａ）、７はミキサ、８は帯域フィルタ（ＢＰＦ）、９は
位相検出部、１０は位置測定部である。FIG. 3 is a block diagram showing the main part of the mobile terminal according to the first embodiment of the present invention. 5 in the figure
a and 5b are antennas, and 6a and 6b are low noise amplifiers (LN
A), 7 are mixers, 8 is a bandpass filter (BPF), 9 is a phase detector, and 10 is a position measuring unit.
【００２３】次に、動作について説明する。２つのアン
テナ５ａ、５ｂからそれぞれ入力されるｆａ１、ｆａ２
または、ｆｂ１、ｆｂ２または、ｆｃ１、ｆｃ２は低雑
音アンプ６ａ、６ｂにより増幅されミキサ７に入力され
る。ミキサ７では、図２（ｃ）に示したようなそれぞれ
の位相差周波数を生成し、生成した位相差信号を帯域フ
ィルタ８を介して位相検出部９に出力する。位相検出部
９では、固定局と同一の高精度クロックにより、
ｆａ１、ｆａ２が同位相となるタイミングを予め固定局
と合わせておく。これにより、高精度で位相差を検出す
る。検出した位相差は位置測定部１０に入力され、上記
（３）式によって固定局−基地局間の距離を算出する。Next, the operation will be described. F a1 and f a2 respectively input from the two antennas 5 a and 5 b
Alternatively , f b1 , f b2 or f c1 , f c2 is amplified by the low noise amplifiers 6 a, 6 b and input to the mixer 7. The mixer 7 generates the respective phase difference frequencies as shown in FIG. 2C, and outputs the generated phase difference signals to the phase detector 9 via the bandpass filter 8. The phase detector 9 uses the same high-precision clock as the fixed station,
The timing at which f a1 and f a2 have the same phase is adjusted in advance with the fixed station. Thereby, the phase difference is detected with high accuracy. The detected phase difference is input to the position measuring unit 10, and the distance between the fixed station and the base station is calculated by the above equation (3).
【００２４】位置測定部１０では、各固定局１、２、３
ごとに行い各固定局−移動局間の距離を算出し、（４）
式で逐次近似法により計算を行って移動局の位置を算出
する。In the position measuring unit 10, each fixed station 1, 2, 3
And calculate the distance between each fixed station and mobile station, and (4)
The position of the mobile station is calculated by performing the iterative approximation method using the equation.
【００２５】以上のように、本発明は固定局から２波の
搬送周波数を送信することにより、移動局で受信した２
波の搬送周波数の信号の位相差から固定局−移動局間の
距離を算出し、３つの固定局を用いる３次元測位により
移動局の自己位置を検出するものである。そのため、位
置検出にＧＰＳ衛星を使う必要がなく、地下、屋内等の
制約を受けずに自己位置検出が可能となり、また、低周
波数である２波の位相差をサンプリングすればよいた
め、サンプリングによる誤差が少なく精度の良い自己位
置の検出が可能な移動局、および移動通信システムを得
る。As described above, according to the present invention, by transmitting two carrier frequencies from the fixed station, the two signals received by the mobile station are received.
The distance between a fixed station and a mobile station is calculated from the phase difference between the signals of the carrier frequencies of waves, and the self-position of the mobile station is detected by three-dimensional positioning using three fixed stations. Therefore, it is not necessary to use GPS satellites for position detection, self-position detection is possible without being restricted by underground, indoor, etc., and it is sufficient to sample the phase difference between two low-frequency waves. (EN) A mobile station and a mobile communication system capable of detecting an own position with little error and with high accuracy.
【００２６】なお、以上の説明では、アンテナが２つあ
る例を示したが、１つのアンテナからの受信信号を分配
器によって２つに分配し、２つの低雑音アンプに入力す
る構成としてもよい。In the above description, an example in which there are two antennas has been shown, but the received signal from one antenna may be divided into two by a divider and input to two low noise amplifiers. .
【００２７】実施の形態２．上記実施の形態１では、２
波の信号の位相差信号を生成する際、搬送周波数の帯域
のまま行ったが、本実施の形態２では、受信した搬送周
波数の信号を中間周波数に変換してから位相差信号を生
成するものである。Embodiment 2. In the first embodiment, 2
When the phase difference signal of the wave signal is generated, the carrier frequency band is used as it is, but in the second embodiment, the phase difference signal is generated after converting the received carrier frequency signal into an intermediate frequency. Is.
【００２８】図４は本実施の形態２に係わる移動局の装
置構成を表すブロック図である。図３と同じ構成要素に
は同一符号を付す。図において１１はローカル周波数発
生器（ＬＯ）である。FIG. 4 is a block diagram showing the device configuration of the mobile station according to the second embodiment. The same components as those in FIG. 3 are designated by the same reference numerals. In the figure, 11 is a local frequency generator (LO).
【００２９】次に動作について説明する。各固定局１、
２、３からそれぞれ２波の距離測定信号を移動局に向け
て送信する点は上記実施の形態１と同様である。例え
ば、固定局１から周波数ｆａ１、ｆａ２の距離測定信号
が移動局に向けて送信されると、移動局４では、アンテ
ナ５ａ、５ｂにて受信した２波の搬送波をそれぞれロー
カル周波数発生器１１とのミキシングにより中間周波数
ｆＩＦ１、ｆＩＦ２に周波数変換した後、上記実施の形
態１と同様に位相検出部９にて中間周波数帯でのｆ
ＩＦ１、ｆＩＦ２の位相差を算出し、位置測定部１０に
おいて固定局−移動局間の距離を求め、３つの固定局と
の離隔距離より３次元測位により移動局の自己位置を検
出する。Next, the operation will be described. Each fixed station 1,
The point that the distance measurement signals of two waves from each of 2 and 3 are transmitted to the mobile station is the same as in the first embodiment. For example, when distance measurement signals of frequencies f a1 and f a2 are transmitted from the fixed station 1 to the mobile station, the mobile station 4 receives the two carrier waves received by the antennas 5 a and 5 b, respectively. After being frequency-converted into intermediate frequencies f IF1 and f IF2 by mixing with 11, the phase detector 9 performs f conversion in the intermediate frequency band in the same manner as in the first embodiment.
The phase difference between IF1 and fIF2 is calculated, the distance between the fixed station and the mobile station is calculated in the position measuring unit 10, and the self position of the mobile station is detected by three-dimensional positioning from the distance between the three fixed stations.
【００３０】中間周波数を使用することにより搬送周波
数の周波数帯の選定に制約を受けずに済み、装置構成を
容易にすることが可能となる。By using the intermediate frequency, there is no restriction on the selection of the frequency band of the carrier frequency, and the device configuration can be simplified.
【００３１】なお、以上の説明では、アンテナが２つあ
る例を示したが、１つのアンテナからの受信信号を分配
器によって２つに分配し、２つの低雑音アンプに入力す
る構成としてもよい。In the above description, an example in which there are two antennas has been shown, but the received signal from one antenna may be divided into two by a distributor and input to two low noise amplifiers. .
【００３２】実施の形態３．上記実施の形態２では、受
信信号を中間周波数に変換してから位相差を算出する構
成の移動局を示したが、本実施の形態３では、固定局に
て距離測定信号を直接拡散し、移動局では、その直接拡
散した距離測定信号を逆拡散してもとの距離測定信号に
戻してから位相差を算出するものである。Embodiment 3. In the second embodiment, the mobile station having the configuration in which the received signal is converted to the intermediate frequency and then the phase difference is calculated is shown. However, in the third embodiment, the fixed station directly spreads the distance measurement signal, The mobile station de-spreads the directly spread distance measurement signal to restore the original distance measurement signal and then calculates the phase difference.
【００３３】図５は本実施の形態３に係わる移動局の装
置構成を表すブロック図である。図において図４と同じ
構成要素には同じ符号を付す。１２ａ、１２ｂは直接拡
散復調部、１３ａ、１３ｂは直接拡散同期回路である。FIG. 5 is a block diagram showing the device configuration of the mobile station according to the third embodiment. In the figure, the same components as those in FIG. 4 are designated by the same reference numerals. Reference numerals 12a and 12b are direct spread demodulation units, and 13a and 13b are direct spread synchronization circuits.
【００３４】次に動作について説明する。例えば、固定
局１から周波数ｆａ１、ｆａ２の２波の距離測定信号を
移動局に向けて送信するが、その際、距離測定信号を直
接拡散して送信する。直接拡散波を用いた通信は、
（１）干渉や妨害を与えたり、受けたりすることが少な
い。（２）マルチパス等によるフェージングの影響を抑
えやすい。（３）信号秘匿能力が増大する。などの特徴
がある。Next, the operation will be described. For example, the fixed station 1 transmits two distance measurement signals of frequencies f a1 and f a2 to the mobile station, at which time the distance measurement signals are directly spread and transmitted. Communication using direct diffusion waves,
(1) It rarely gives or receives interference or disturbance. (2) It is easy to suppress the influence of fading due to multipath and the like. (3) The signal concealment capability is increased. There are features such as.
【００３５】移動局４では、アンテナ５ａ、５ｂで受信
した２つの直接拡散信号を直接拡散復調部１２ａにて逆
拡散し、搬送周波数ｆａ１、ｆａ２の距離測定信号を再
生する。直接拡散同期回路１３ａ、１３ｂは直接拡散復
調部１２ａ、１２ｂに入力される拡散された距離測定信
号と同期したＰＮ符号等の拡散コードを発生するもので
ある。ここで発生した拡散コードは直接拡散復調部１２
ａ、１２ｂに入力され、距離測定信号との相関をとるこ
とで逆拡散によって狭帯域の信号を取り出す。In the mobile station 4, the two direct spread signals received by the antennas 5a and 5b are despread by the direct spread demodulator 12a to reproduce the distance measurement signals of the carrier frequencies f a1 and f a2 . The direct spread synchronization circuits 13a and 13b generate a spread code such as a PN code synchronized with the spread distance measurement signal input to the direct spread demodulation units 12a and 12b. The spread code generated here is the direct spread demodulation unit 12
The signal of a narrow band is extracted by despreading by inputting to a and 12b and correlating with the distance measurement signal.
【００３６】この周波数ｆａ１、ｆａ２から位相差を検
出し、各固定局−移動局間の距離を求める。３つの固定
局との距離より３次元測位により移動局の自己位置を検
出する点は上記実施の形態１と同様である。また、距離
測定信号の搬送周波数ｆａ１、ｆａ２を上記実施の形態
２のように、ローカル周波数発生器を組み込んで中間周
波数に変換して位相差を算出する構成としても良い。The phase difference is detected from the frequencies f a1 and f a2 to obtain the distance between each fixed station and mobile station. The point where the self-position of the mobile station is detected by three-dimensional positioning from the distances to the three fixed stations is the same as in the first embodiment. Further, the carrier frequencies f a1 and f a2 of the distance measurement signal may be configured to incorporate the local frequency generator and convert into the intermediate frequency to calculate the phase difference as in the second embodiment.
【００３７】以上のように、本実施の形態３では、距離
測定信号として直接拡散信号を使用することによりマル
チパス等のフェージングに強く、耐干渉性能を向上する
ことが可能となる。As described above, in the third embodiment, the direct spread signal is used as the distance measurement signal, so that it is resistant to fading such as multipath and the anti-interference performance can be improved.
【００３８】なお、以上の説明では、アンテナが２つあ
る例を示したが、１つのアンテナからの受信信号を分配
器によって２つに分配し、２つの低雑音アンプに入力す
る構成としてもよい。In the above description, an example in which there are two antennas has been shown, but the received signal from one antenna may be divided into two by a distributor and input to two low noise amplifiers. .
【００３９】実施の形態４．上記実施の形態３では、直
接拡散した２つの距離測定信号を用いる例を示したが、
本実施の形態４では、２つの距離測定信号に周波数ホッ
ピング変調をかけ、移動局において復調し、復調した２
つの距離測定信号の位相差から距離を測定するものであ
る。Fourth Embodiment In the above-described Embodiment 3, an example using two directly spread distance measurement signals is shown.
In the fourth embodiment, two distance measurement signals are frequency-hopping modulated, demodulated in the mobile station, and demodulated.
The distance is measured from the phase difference between two distance measurement signals.
【００４０】図６は本実施の形態４に係わる移動局の構
成を表すブロック図である。図において図５と同じ構成
要素には同じ符号を付す。１４ａ、１４ｂは周波数ホッ
ピング復調部、１５ａ、１５ｂは周波数シンセサイザ、
１６ａ、１６ｂは周波数ホッピング同期回路である。FIG. 6 is a block diagram showing the configuration of the mobile station according to the fourth embodiment. In the figure, the same components as those in FIG. 5 are designated by the same reference numerals. 14a and 14b are frequency hopping demodulators, 15a and 15b are frequency synthesizers,
16a and 16b are frequency hopping synchronization circuits.
【００４１】次に動作について説明する。例えば、固定
局１から周波数ｆａ１、ｆａ２の２波の距離測定信号を
移動局に向けて送信するが、その際、距離測定信号を周
波数ホッピング変調して送信する。周波数ホッピング変
調は、図７（ａ）のような周波数一定な元の信号を、図
７（ｂ）のように一定の時間ごとにホッピングパターン
（拡散周波数系列）に従って不規則なパターンで周波数
を切り換えながら送信を行うものである。受信側では周
波数シンセサイザの出力周波数を、送信側と、同一かつ
同期したホッピングパターンで切り換えてミキシングす
ることで、受信した図７（ｂ）のような信号を逆拡散し
て、元の図７（ａ）のような周波数一定の信号に復調す
る。周波数ホッピングは、例えば、周波数帯の一部が外
乱の影響で使用不能でも、他の周波数帯で送信した部分
に影響がなければ、使用不能の周波数で送信した部分を
補間することでできるため、マルチパス等のフェージン
グに強く、耐干渉能力、信号秘匿能力が向上する。Next, the operation will be described. For example, the fixed station 1 transmits two distance measurement signals of frequencies f a1 and f a2 to the mobile station. At this time, the distance measurement signal is frequency hopping-modulated and transmitted. In frequency hopping modulation, an original signal with a constant frequency as shown in FIG. 7A is switched in frequency with an irregular pattern according to a hopping pattern (spread frequency sequence) at regular intervals as shown in FIG. 7B. While transmitting. On the receiving side, the output frequency of the frequency synthesizer is switched by the same and synchronized hopping pattern as on the transmitting side to perform mixing, thereby despreading the received signal as shown in FIG. Demodulate to a signal with a constant frequency as in a). Frequency hopping, for example, even if a part of the frequency band is unusable due to the influence of disturbance, if there is no effect on the part transmitted in another frequency band, it is possible to interpolate the part transmitted in the unusable frequency, Strong against fading such as multipath, and improved interference resistance and signal concealment.
【００４２】移動局４では、アンテナ５ａ、５ｂで受信
した図７（ｂ）のような２つの周波数ホッピング信号を
周波数ホッピング復調部１４、１４ｂａにて図７（ａ）
のような一定周波数の信号に復調し、搬送周波数
ｆａ１、ｆａ２の距離測定信号を再生する。その際、周
波数ホッピング同期回路１６ａ、１６ｂは、送信側と同
一でかつ同期したホッピングパターンで切り換えるよう
シンセサイザ１５ａ、１５ｂを制御し、シンセサイザ１
５ａ、１５ｂからの出力をミキシングすることで、周波
数ホッピング復調部１４ａ、１４ｂに入力された図７
（ｂ）のような信号を、図７（ａ）のような信号に復調
する。In the mobile station 4, the two frequency hopping signals as shown in FIG. 7B received by the antennas 5a and 5b are received by the frequency hopping demodulators 14 and 14ba as shown in FIG.
To a signal having a constant frequency, and the distance measurement signals having carrier frequencies f a1 and f a2 are reproduced. At that time, the frequency hopping synchronization circuits 16a and 16b control the synthesizers 15a and 15b so as to switch the hopping patterns in the same and synchronized manner as the transmitting side.
By mixing the outputs from 5a and 15b, the frequency hopping demodulators 14a and 14b which are input to the frequency hopping demodulators 14a and 14b shown in FIG.
A signal as shown in FIG. 7B is demodulated into a signal as shown in FIG.
【００４３】この周波数ｆａ１、ｆａ２から位相差を検
出し、各固定局−移動局間の距離を求める。３つの固定
局との距離より３次元測位により移動局の自己位置を検
出する点は上記実施の形態１と同様である。また、距離
測定信号の搬送周波数ｆａ１、ｆａ２を上記実施の形態
２のように、ローカル周波数発生器を組み込んで中間周
波数に変換して位相差を算出する構成としても良い。The phase difference is detected from the frequencies f a1 and f a2 to find the distance between each fixed station and mobile station. The point where the self-position of the mobile station is detected by three-dimensional positioning from the distances to the three fixed stations is the same as in the first embodiment. Further, the carrier frequencies f a1 and f a2 of the distance measurement signal may be configured to incorporate the local frequency generator and convert into the intermediate frequency to calculate the phase difference as in the second embodiment.
【００４４】以上のように、本実施の形態４では、距離
測定信号として周波数ホッピング信号を送信することに
よりマルチパス等のフェージングに強く、耐干渉性能を
向上することが可能となる。As described above, according to the fourth embodiment, by transmitting the frequency hopping signal as the distance measurement signal, it is possible to resist fading such as multipath and improve the anti-interference performance.
【００４５】なお、以上の説明では、アンテナが２つあ
る例を示したが、１つのアンテナからの受信信号を分配
器によって２つに分配し、２つの低雑音アンプに入力す
る構成としてもよい。In the above description, an example in which there are two antennas has been shown, but the received signal from one antenna may be divided into two by a distributor and input to two low noise amplifiers. .
【００４６】[0046]
【発明の効果】以上のように、本発明に係わる移動局
は、周波数の異なる２つの距離測定信号を送信する固定
局と、前記固定局から無線送信される周波数の異なる２
つの距離測定信号を受信する受信手段と、前記受信手段
で受信した２つの距離測定信号の位相差を検出する位相
差検出手段と、前記位相差から自己と前記２つの距離測
定信号を送信した前記固定局との距離を測定する距離測
定手段と、３つの前記固定局と自己との距離から自己位
置を算出する自己位置算出手段とを備える移動局を備え
るため、２つの距離測定信号の差である低周波数の信号
をサンプリングするため、サンプリングによる誤差が少
なく精度の良い自己位置の検出が可能な移動局、および
移動通信システムを得る。As described above, the mobile station according to the present invention has a fixed station that transmits two distance measurement signals having different frequencies, and a fixed station that wirelessly transmits from the fixed station.
Receiving means for receiving one distance measuring signal, phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means, and the self transmitting means for transmitting the two distance measuring signals from the phase difference. Since the mobile station is provided with the distance measuring means for measuring the distance to the fixed station and the self-position calculating means for calculating the self-position from the distance between the fixed station and the self, the difference between the two distance measurement signals Since a signal of a certain low frequency is sampled, a mobile station and a mobile communication system capable of detecting a self-position accurately with little error due to sampling are obtained.
【００４７】また、搬送周波数の距離測定信号を中間周
波数に変換して位相差を算出するため、無線の周波数帯
の選定に制約を受けずに済むため、装置構成が容易であ
る。Further, since the distance measurement signal of the carrier frequency is converted into the intermediate frequency and the phase difference is calculated, there is no restriction on the selection of the radio frequency band, and the device configuration is simple.
【００４８】また、直接拡散した距離測定信号を用いる
ため、マルチパス等のフェージングに強く、耐干渉性能
が向上するものである。Further, since the distance measurement signal directly diffused is used, it is resistant to fading such as multipath and the anti-interference performance is improved.
【００４９】また、周波数ホッピング変調した距離測定
信号を用いるため、マルチパス等のフェージングに強
く、耐干渉性能が向上するものである。Further, since the distance measurement signal subjected to frequency hopping modulation is used, it is resistant to fading such as multipath and the interference resistance performance is improved.
【図１】 本発明の実施の形態１に係わる移動通信シス
テムの構成を表す図である。FIG. 1 is a diagram showing a configuration of a mobile communication system according to a first embodiment of the present invention.
【図２】 ２つの異なる周波数の距離測定信号の位相差
検出例を表す図である。（ａ）固定局１からの第１の距
離測定信号の波形である。（ｂ）固定局２からの第２の
距離測定信号の波形である。（ｃ）上記第１および第２
の距離測定信号の位相差を表す波形である。FIG. 2 is a diagram illustrating an example of detecting a phase difference between distance measurement signals having two different frequencies. (A) A waveform of the first distance measurement signal from the fixed station 1. (B) It is a waveform of the second distance measurement signal from the fixed station 2. (C) First and second
3 is a waveform showing the phase difference of the distance measurement signal of FIG.
【図３】 本発明の実施の形態１に係わる移動局の構成
を表すブロック図である。FIG. 3 is a block diagram showing a configuration of a mobile station according to the first embodiment of the present invention.
【図４】 本発明の実施の形態２に係わる移動局の構成
を表すブロック図である。FIG. 4 is a block diagram showing a configuration of a mobile station according to the second embodiment of the present invention.
【図５】 本発明の実施の形態３に係わる移動局の構成
を表すブロック図である。FIG. 5 is a block diagram showing a configuration of a mobile station according to Embodiment 3 of the present invention.
【図６】 本発明の実施の形態４に係わる移動局の構成
を表すブロック図である。FIG. 6 is a block diagram showing a configuration of a mobile station according to Embodiment 4 of the present invention.
【図７】 周波数ホッピング変調前後の距離測定信号の
周波数分布を表す図である。（ａ）周波数ホッピング変
調前の距離測定信号の周波数分布である。（ｂ）周波数
ホッピング変調後の距離測定信号の周波数分布である。FIG. 7 is a diagram showing a frequency distribution of a distance measurement signal before and after frequency hopping modulation. (A) Frequency distribution of the distance measurement signal before frequency hopping modulation. (B) Frequency distribution of the distance measurement signal after frequency hopping modulation.
【図８】 従来の移動通信システムの構成を表すブロッ
ク図である。FIG. 8 is a block diagram showing a configuration of a conventional mobile communication system.
【図９】 周波数によって信号のサンプリング誤差の違
いが出てくることを示す図である。（ａ）高周波数の信
号をサンプリングする場合の図である。（ｂ）低周波数
の信号をサンプリングする場合の図である。FIG. 9 is a diagram showing that a difference in signal sampling error appears depending on a frequency. (A) It is a figure at the time of sampling a high frequency signal. (B) It is a figure at the time of sampling a low frequency signal.
１ 固定局Ａ、 ２ 固定局Ｂ、 ３ 固定局Ｃ、
４ 移動局、５ａ、５ｂ アンテナ、 ６ａ、６
ｂ 低雑音アンプ（ＬＮＡ）、７、７ａ、７ｂ、７ｃ
ミキサ、 ８、８ａ、８ｂ、８ｃ 帯域フィルタ、９
位相検出部、 １０ 位置測定部、 １１ ロー
カル周波数発生器、１２ａ、１２ｂ 直接拡散復調部、
１３ａ、１３ｂ 直接拡散同期回路、１４ａ、１４
ｂ 周波数ホッピング復調部、 １５ａ、１５ｂ シ
ンセサイザ１６ａ、１６ｂ 周波数ホッピング同期回
路。1 fixed station A, 2 fixed station B, 3 fixed station C,
4 mobile stations, 5a, 5b antennas, 6a, 6
b Low Noise Amplifier (LNA), 7, 7a, 7b, 7c
Mixer, 8, 8a, 8b, 8c bandpass filter, 9
Phase detection unit, 10 position measurement unit, 11 local frequency generator, 12a, 12b direct spread demodulation unit,
13a, 13b direct diffusion synchronous circuit, 14a, 14
b frequency hopping demodulator, 15a, 15b synthesizers 16a, 16b frequency hopping synchronization circuit.
Claims (8)
る２つの距離測定信号を受信する受信手段と、この受信
手段で受信した２つの距離測定信号の位相差を検出する
位相差検出手段と、前記位相差から自己と前記２つの距
離測定信号を送信した前記固定局との距離を測定する距
離測定手段と、３つの固定局と自己との距離から自己位
置を算出する自己位置算出手段とを備えることを特徴と
する移動局。1. A receiving means for receiving two distance measuring signals of different frequencies wirelessly transmitted from a fixed station, and a phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means, Distance measuring means for measuring the distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference, and self position calculating means for calculating the self position from the distance between the three fixed stations and self. A mobile station characterized by comprising.
る２つの距離測定信号を受信し、中間周波数に変換する
受信手段と、この受信手段で受信した２つの距離測定信
号の位相差を検出する位相差検出手段と、前記位相差か
ら自己と前記２つの距離測定信号を送信した前記固定局
との距離を測定する距離測定手段と、３つの固定局と自
己との距離から自己位置を算出する自己位置算出手段と
を備えることを特徴とする移動局。2. A receiving means for receiving two distance measurement signals of different frequencies wirelessly transmitted from a fixed station and converting them to an intermediate frequency, and a phase difference between the two distance measurement signals received by the receiving means is detected. Phase difference detection means, distance measurement means for measuring the distance between itself and the fixed station that has transmitted the two distance measurement signals from the phase difference, and self position calculation from the distance between the three fixed stations and self A mobile station comprising self-position calculating means.
直接拡散された距離測定信号を受信し、受信した距離測
定信号に逆拡散を施す受信手段と、この受信手段で受信
した２つの距離測定信号の位相差を検出する位相差検出
手段と、前記位相差から自己と前記２つの距離測定信号
を送信した前記固定局との距離を測定する距離測定手段
と、３つの固定局と自己との距離から自己位置を算出す
る自己位置算出手段とを備えることを特徴とする移動
局。3. Receiving means for receiving two different directly spread distance measuring signals wirelessly transmitted from a fixed station and despreading the received distance measuring signals, and two distance measuring means received by the receiving means. A phase difference detecting means for detecting a phase difference between signals; a distance measuring means for measuring a distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference; and three fixed stations and the self. A mobile station, comprising: a self-position calculating unit that calculates a self-position from a distance.
周波数ホッピング変調された距離測定信号を受信し、受
信した距離測定信号を周波数ホッピング復調を行う受信
手段と、この受信手段で受信した２つの距離測定信号の
位相差を検出する位相差検出手段と、前記位相差から自
己と前記２つの距離測定信号を送信した前記固定局との
距離を測定する距離測定手段と、３つの固定局と自己と
の距離から自己位置を算出する自己位置算出手段とを備
えることを特徴とする移動局。4. A receiving means for receiving two different frequency hopping-modulated distance measurement signals wirelessly transmitted from a fixed station, and performing frequency hopping demodulation on the received distance measurement signals, and two receiving means received by the receiving means. Phase difference detection means for detecting a phase difference between the distance measurement signals, distance measurement means for measuring the distance between itself and the fixed station that has transmitted the two distance measurement signals from the phase difference, three fixed stations and self A mobile station, comprising: a self-position calculating means for calculating a self-position from the distance between the mobile station and the mobile station.
信する固定局と、前記固定局から無線送信される周波数
の異なる２つの距離測定信号を受信する受信手段と、前
記受信手段で受信した２つの距離測定信号の位相差を検
出する位相差検出手段と、前記位相差から自己と前記２
つの距離測定信号を送信した前記固定局との距離を測定
する距離測定手段と、３つの固定局と自己との距離から
自己位置を算出する自己位置算出手段とを備える移動局
を備えることを特徴とする移動体通信システム。5. A fixed station for transmitting two distance measuring signals having different frequencies, a receiving means for receiving two distance measuring signals of different frequencies wirelessly transmitted from the fixed station, and a receiving means for receiving the two signals by the receiving means. A phase difference detecting means for detecting a phase difference between the two distance measurement signals, and the self and the
A mobile station comprising distance measuring means for measuring a distance from the fixed station that has transmitted three distance measuring signals, and self-position calculating means for calculating a self-position from the distance between the three fixed stations and self. Mobile communication system.
信する固定局と、前記固定局から無線送信される周波数
の異なる２つの距離測定信号を受信し、中間周波数に変
換する受信手段と、前記受信手段で受信した２つの距離
測定信号の位相差を検出する位相差検出手段と、前記位
相差から自己と前記２つの距離測定信号を送信した固定
局との距離を測定する距離測定手段と、３つの固定局と
自己との距離から自己位置を算出する自己位置算出手段
とを備える移動局を備えることを特徴とする移動体通信
システム。6. A fixed station that transmits two distance measurement signals having different frequencies, a receiving unit that receives two distance measurement signals having different frequencies wirelessly transmitted from the fixed station, and converts the distance measurement signals to an intermediate frequency. Phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means, and distance measuring means for measuring the distance between itself and the fixed station that has transmitted the two distance measuring signals from the phase difference, A mobile communication system comprising: a mobile station comprising three fixed stations and a self-position calculating means for calculating a self-position from the distances between the three fixed stations.
号を送信する固定局と、固定局から無線送信される２つ
の異なる直接拡散された距離測定信号を受信し、受信し
た距離測定信号に逆拡散を施す受信手段と、前記受信手
段で受信した２つの距離測定信号の位相差を検出する位
相差検出手段と、位相差から自己と前記２つの距離測定
信号を送信した前記固定局との距離を測定する距離測定
手段と、３つの前記固定局と自己との距離から自己位置
を算出する自己位置算出手段とを備える移動局を備える
ことを特徴とする移動体通信システム。7. A fixed station transmitting two different directly spread distance measuring signals, and receiving two different directly spread distance measuring signals wirelessly transmitted from the fixed station and reversing the received distance measuring signals. Receiving means for spreading, phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means, and distance between the self and the fixed station transmitting the two distance measuring signals from the phase difference. A mobile communication system comprising: a mobile station provided with a distance measuring means for measuring the position and a self-position calculating means for calculating a self-position from the distance between the three fixed stations and the self.
た距離測定信号を送信する固定局と、前記固定局から無
線送信される２つの異なる周波数ホッピング変調された
距離測定信号を受信し、受信した距離測定信号を周波数
ホッピング復調を行う受信手段と、前記受信手段で受信
した２つの距離測定信号の位相差を検出する位相差検出
手段と、前記位相差から自己と前記２つの距離測定信号
を送信した前記固定局との距離を測定する距離測定手段
と、３つの固定局と自己との距離から自己位置を算出す
る自己位置算出手段とを備える移動局を備えることを特
徴とする移動体通信システム。8. A fixed station transmitting two different frequency hopping modulated distance measuring signals, and two different frequency hopping modulated distance measuring signals wirelessly transmitted from the fixed station, and the received distance measuring. Receiving means for performing frequency hopping demodulation on the signal; phase difference detecting means for detecting a phase difference between the two distance measuring signals received by the receiving means; and transmitting the self and the two distance measuring signals from the phase difference. A mobile communication system comprising: a mobile station including distance measuring means for measuring a distance to a fixed station and self-position calculating means for calculating a self-position from the distances between three fixed stations and self.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002003476A JP2003207557A (en) | 2002-01-10 | 2002-01-10 | Mobile station and movable body communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002003476A JP2003207557A (en) | 2002-01-10 | 2002-01-10 | Mobile station and movable body communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003207557A true JP2003207557A (en) | 2003-07-25 |
Family
ID=27643058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002003476A Pending JP2003207557A (en) | 2002-01-10 | 2002-01-10 | Mobile station and movable body communication system |
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| Country | Link |
|---|---|
| JP (1) | JP2003207557A (en) |
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