JPH10322752A - Mobile station position estimating method in cellular mobile communication, base station device and mobile station device - Google Patents

Mobile station position estimating method in cellular mobile communication, base station device and mobile station device

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Publication number
JPH10322752A
JPH10322752A JP10060104A JP6010498A JPH10322752A JP H10322752 A JPH10322752 A JP H10322752A JP 10060104 A JP10060104 A JP 10060104A JP 6010498 A JP6010498 A JP 6010498A JP H10322752 A JPH10322752 A JP H10322752A
Authority
JP
Japan
Prior art keywords
mobile station
signal sequence
base station
phase difference
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
Application number
JP10060104A
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Japanese (ja)
Other versions
JP3370926B2 (en
Inventor
Shinji Kamibayashi
真司 上林
Hiroshi Ono
公士 大野
Seizo Onoe
誠蔵 尾上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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Publication date
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Priority to JP06010498A priority Critical patent/JP3370926B2/en
Publication of JPH10322752A publication Critical patent/JPH10322752A/en
Application granted granted Critical
Publication of JP3370926B2 publication Critical patent/JP3370926B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a mobile station position estimating method in cellular mobile communication, which can easily estimate the position of a mobile station, in general cellular mobile communication in which base stations are asynchronous, and to provide a base station device and a mobile station device. SOLUTION: The mobile station device 100 converts a first peculiar signal system (PN1) from a PN1 generation part 101 into a prescribed format in a transmission signal processing part 104 and transmits it to the base station device 200 from a transmission part 105 as a position estimation reference signal. The base station device 200 transmits a second peculiar signal system (PN2) from a PN2 generation part 202 to the mobile station 100 synchronously with the first peculiar signal system (PN1) received in a reception part 206. The mobile station 100 compares the phase of the transmitted first peculiar signal system (PN1) with that of the second peculiar signal system (PN2) in a phase comparison part 108 and a phase difference is obtained. A distance calculation part 109 calculates an estimated distance between the base station 206 and the mobile station 100 based on the phase difference and estimates the position of the mobile station.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、移動局と基地局の
間で通信を行うセルラ移動通信において移動局の位置を
推定する移動局位置推定方法および該位置推定方法を実
施する基地局装置と移動局装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station position estimating method for estimating the position of a mobile station in cellular mobile communication in which communication is performed between a mobile station and a base station, and a base station apparatus for implementing the position estimating method. It relates to a mobile station device.

【０００２】[0002]

【従来の技術】従来のセルラ移動通信システムでは、通
信している移動局の位置を推定することはできなかっ
た。そのため、緊急電話（日本の１１０番、１１９番、
米国の９１１番等）の発信者の位置が特定できない等の
問題が指摘されていた。2. Description of the Related Art In a conventional cellular mobile communication system, the position of a communicating mobile station could not be estimated. Therefore, emergency calls (110, 119,
It has been pointed out that the location of the caller (911 in the United States) cannot be specified.

【０００３】無線により位置を推定する技術は、船舶、
航空機の電波航法（ビーコン、ロラン、マイクロ波着陸
装置等）がよく知られている。しかし、これらの技術は
セルラ移動通信には適さない。[0003] Technologies for estimating the position by radio include a ship,
Aircraft radio navigation (beacon, Loran, microwave landing gear, etc.) is well known. However, these techniques are not suitable for cellular mobile communications.

【０００４】ビーコンは、移動機に方向探知機能が必要
となり、小型化に適さない。ロラン等の双曲線位置線方
式は、基地局間の同期が必要である。一般にセルラ移動
通信の基地局は互いに同期していないため本方式は適用
できない（米国ＥＬＡ／ＴＩＡ標準のＩＳ−９５方式
は、例外的に基地局間が同期しているためこの種の方式
が適用できる）。マイクロ波着陸装置は、特殊な指向性
のアンテナを用い、特定のエリアの航空機の位置を高い
精度で測定できるが、簡易な無線設備で任意の位置の移
動局を測定することは困難である。A beacon requires a direction finding function for a mobile device and is not suitable for miniaturization. The hyperbolic position line method such as Loran requires synchronization between base stations. In general, this method cannot be applied because the base stations of cellular mobile communication are not synchronized with each other (except for the US ELA / TIA standard IS-95 method, which is exceptionally synchronized between base stations, this type of method is applied. it can). The microwave landing device can measure the position of an aircraft in a specific area with high accuracy by using a special directional antenna, but it is difficult to measure a mobile station at an arbitrary position with simple wireless equipment.

【０００５】最近、衛星を用いた位置測定方式ＧＰＳ
（Global Positioning System ）が普及しているが、こ
れも衛星局間は高精度で同期したシステムであり、上記
ＩＳ−９５方式には応用可能だが、一般のセルラ移動通
信システムは非同期システムであり、本方式は適用でき
ない。Recently, a position measuring system using a satellite, GPS
(Global Positioning System) is widely used, but it is also a highly accurate synchronized system between satellite stations, and can be applied to the above IS-95 system. However, general cellular mobile communication systems are asynchronous systems. This method cannot be applied.

【０００６】[0006]

【発明が解決しようとする課題】上述したように、従来
の無線を用いた位置推定技術は、移動機、基地局の無線
機の小型化が困難であるとともに、または基地局間同期
が必要等のため、一般のセルラ移動通信には適さないと
いう問題があった。As described above, in the conventional position estimation technique using radio waves, it is difficult to reduce the size of the radio equipment of the mobile station and the base station, or synchronization between base stations is required. Therefore, there is a problem that it is not suitable for general cellular mobile communication.

【０００７】本発明は、上記に鑑みてなされたもので、
その目的とするところは、基地局間が非同期の一般のセ
ルラ移動通信において簡易に移動局の位置を推定するこ
とができるセルラ移動通信における移動局位置推定方法
および基地局装置と移動局装置を提供することにある。[0007] The present invention has been made in view of the above,
It is an object of the present invention to provide a method for estimating the position of a mobile station in cellular mobile communication, and a base station apparatus and a mobile station apparatus capable of easily estimating the position of a mobile station in general cellular mobile communication in which base stations are asynchronous. Is to do.

【０００８】[0008]

【課題を解決するための手段】上記目的を達成するた
め、本発明は、移動局と基地局の間で通信を行うセルラ
移動通信において、（ａ）基地局と移動局の間で、該移
動局に対し固有に予め決められた第１の信号系列と第２
の信号系列をやり取りし、（ｂ）基地局と移動局の内の
一方の局において、前記第１の信号系列と前記第２の信
号系列の位相差を求め、該位相差に基づいて基地局と移
動局の間の推定距離を算出して移動局の位置を推定する
ことを特徴とする移動局位置推定方法を提供する。In order to achieve the above object, the present invention relates to a cellular mobile communication system for performing communication between a mobile station and a base station. A first signal sequence uniquely predetermined for the station and a second signal sequence;
(B) In one of the base station and the mobile station, a phase difference between the first signal sequence and the second signal sequence is determined, and the base station is determined based on the phase difference. And estimating the position of the mobile station by calculating an estimated distance between the mobile station and the mobile station.

【０００９】また、本発明では、前記ステップ（ａ）に
おいて、前記一方の局は前記第１の信号系列を基地局と
移動局の内の他方の局に送信し、前記他方の局は受信し
た前記第１の信号系列に同期して前記第２の信号系列を
前記一方の局に送信し、前記ステップ（ｂ）において、
前記一方の局は送信した前記第１の信号系列と受信した
前記第２の信号系列の位相を比較して前記位相差を求め
ることを特徴とする。In the present invention, in the step (a), the one station transmits the first signal sequence to the other of the base station and the mobile station, and the other station receives the first signal sequence. Transmitting the second signal sequence to the one station in synchronization with the first signal sequence;
The one station may determine the phase difference by comparing the phase of the transmitted first signal sequence with the phase of the received second signal sequence.

【００１０】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記他方
の局は最も遅延時間の短いパスから受信した前記第１の
信号系列に同期して前記第２の信号系列を送信すること
を特徴とする。In the present invention, when a multipath signal is received in the step (a), the other station is synchronized with the first signal sequence received from the path having the shortest delay time. The second signal sequence is transmitted.

【００１１】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記ステ
ップ（ｂ）において前記一方の局は最も遅延時間の短い
パスから受信した前記第２の信号系列を使用して前記位
相差を求めることを特徴とする。In the present invention, when a multipath signal is received in the step (a), the one station in the step (b) receives the multipath signal from the second station received from the path having the shortest delay time. The phase difference is obtained using a signal sequence.

【００１２】また、本発明では、前記ステップ（ａ）に
おいて、前記一方の局は前記第１の信号系列を基地局と
移動局の内の他方の局に送信し、前記他方の局は受信し
た前記第１の信号系列と送信する前記第２の信号系列の
位相を比較して第１の位相差を求め、該第１の位相差の
情報と前記第２の信号系列を前記一方の局に送信し、前
記ステップ（ｂ）において、前記一方の局は送信した前
記第１の信号系列と受信した前記第２の信号系列の位相
を比較して第２の位相差を求め、前記第１の位相差と該
第２の位相差を用いて前記推定距離を算出することを特
徴とする。Further, in the present invention, in the step (a), the one station transmits the first signal sequence to the other of the base station and the mobile station, and the other station receives the first signal sequence. The first signal sequence and the phase of the second signal sequence to be transmitted are compared to determine a first phase difference, and the information on the first phase difference and the second signal sequence are sent to the one station. Transmitting, in the step (b), the one station compares a phase of the transmitted first signal sequence with a phase of the received second signal sequence to obtain a second phase difference, The estimation distance is calculated using a phase difference and the second phase difference.

【００１３】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記他方
の局は最も遅延時間の短いパスから受信した前記第１の
信号系列を使用して前記第１の位相差を求めることを特
徴とする。In the present invention, when a multipath signal is received in the step (a), the other station uses the first signal sequence received from the path with the shortest delay time. The method is characterized in that the first phase difference is obtained.

【００１４】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記ステ
ップ（ｂ）において前記一方の局は最も遅延時間の短い
パスから受信した前記第２の信号系列を使用して前記第
２の位相差を求めることを特徴とする。In the present invention, when a multipath signal is received in the step (a), the one station in the step (b) receives the multipath signal from the path having the shortest delay time. The second phase difference is obtained using a signal sequence.

【００１５】また、本発明では、前記セルラ移動通信は
ＣＤＭＡ方式の移動通信であって、前記第１の信号系列
と前記第２の信号系列はＣＤＭＡ方式の拡散符号である
ことを特徴とする。Further, in the present invention, the cellular mobile communication is a CDMA mobile communication, and the first signal sequence and the second signal sequence are CDMA spreading codes.

【００１６】また、本発明では、前記セルラ移動通信は
各基地局が全移動局に対して報知する情報を送信する報
知チャネルを有するものであり、前記一方の局は基地局
であって、前記ステップ（ａ）において基地局は前記第
１の信号系列を該報知チャネルで送信することを特徴と
する。Further, in the present invention, the cellular mobile communication has a broadcast channel for transmitting information broadcasted by each base station to all mobile stations, and the one station is a base station, In the step (a), the base station transmits the first signal sequence on the broadcast channel.

【００１７】また、本発明では、前記ステップ（ａ）に
おいて、移動局は複数の基地局の各々と前記第１の信号
系列と前記第２の信号系列のやり取りを行い、前記ステ
ップ（ｂ）は該複数の基地局に対する移動局の推定距離
を各々算出し、得られた該複数の基地局に対する移動局
の推定距離を総合して移動局の位置を推定することを特
徴とする。In the present invention, in the step (a), the mobile station exchanges the first signal sequence and the second signal sequence with each of a plurality of base stations, and the step (b) An estimated distance of the mobile station to each of the plurality of base stations is calculated, and a position of the mobile station is estimated by integrating the obtained estimated distances of the mobile station to the plurality of base stations.

【００１８】また、本発明では、前記ステップ（ａ）に
おいて、移動局は前記複数の基地局に対して送信する信
号を符号多重して同時にマルチコード送信することを特
徴とする。Further, in the present invention, in the step (a), the mobile station code-multiplexes signals to be transmitted to the plurality of base stations and simultaneously transmits the multi-code.

【００１９】また、本発明では、前記ステップ（ａ）に
おいて、移動局は前記複数の基地局に対して送信する信
号をフレーム構成のチャネルに時分割多重して送信する
ことを特徴とする。Further, in the present invention, in the step (a), the mobile station is characterized in that a signal to be transmitted to the plurality of base stations is time-division multiplexed to a frame-structured channel and transmitted.

【００２０】また、本発明では、前記一方の局は移動局
であり、前記ステップ（ａ）において、基地局は移動局
が前記第１の信号系列を基地局に送信する前に、移動局
に対して固有に予め決められた第３の信号系列を報知チ
ャネルで送信し、移動局は受信した前記第３の信号系列
に同期して前記第１の信号系列を基地局に送信すること
を特徴とする。Further, in the present invention, the one station is a mobile station, and in the step (a), the base station transmits to the mobile station before the mobile station transmits the first signal sequence to the base station. Transmitting a third signal sequence uniquely predetermined for the broadcast channel, and the mobile station transmitting the first signal sequence to the base station in synchronization with the received third signal sequence. And

【００２１】また、本発明では、前記一方の局は移動局
であり、前記ステップ（ａ）において、基地局は移動局
が前記第１の信号系列を基地局に送信する前に、移動局
に対して固有に予め決められた第３の信号系列を報知チ
ャネルで送信し、移動局は受信した前記第３の信号系列
と送信する前記第１の信号系列の位相を比較して第１の
位相差を求め、該第１の位相差の情報と前記第２の信号
系列を基地局に送信し、基地局は受信した前記第１の信
号系列と送信した前記第３の信号系列の位相を比較して
第２の位相差を求め、前記第１の位相差と該第２の位相
差から基地局と移動局の第１の推定距離を算出し、受信
した前記第１の信号系列と送信する前記第２の信号系列
の位相を比較して第３の位相差を求め、該第３の位相差
の情報と前記第１の推定距離の情報と前記第２の信号系
列を移動局に送信し、前記ステップ（ｂ）において、移
動局は送信した前記第１の信号系列と受信した前記第２
の信号系列の位相を比較して第４の位相差を求め、前記
第３の位相差と前記第４の位相差から基地局と移動局の
第２の推定距離を算出し、前記第１の推定距離と該第２
の推定距離から前記推定距離を算出することを特徴とす
る。In the present invention, the one station is a mobile station, and in the step (a), the base station transmits to the mobile station before the mobile station transmits the first signal sequence to the base station. The mobile station transmits a third signal sequence uniquely predetermined to the broadcast channel, and the mobile station compares the phase of the received third signal sequence with the phase of the transmitted first signal sequence to determine the first position. Calculating a phase difference, transmitting the information on the first phase difference and the second signal sequence to a base station, and comparing the received first signal sequence with the transmitted third signal sequence; To calculate a second phase difference, calculate a first estimated distance between the base station and the mobile station from the first phase difference and the second phase difference, and transmit the first estimated distance to the received first signal sequence. The phase of the second signal sequence is compared to obtain a third phase difference, and the information of the third phase difference is compared with the first phase difference. Transmits the information and the second signal sequence of the estimated distance to the mobile station, wherein step (b), the mobile station the second received and transmitted by the first signal sequence
The fourth phase difference is obtained by comparing the phases of the signal sequences of the above, and a second estimated distance between the base station and the mobile station is calculated from the third phase difference and the fourth phase difference. The estimated distance and the second
The estimated distance is calculated from the estimated distance.

【００２２】また、本発明では、前記ステップ（ｂ）
は、基地局のサービスエリア内で基地局から前記推定距
離離れた位置に対し所定の誤差を考慮して得られる推定
位置エリア内を移動局の位置と推定し、前記ステップ
（ａ）において移動局が複数の基地局の各々と前記第１
の信号系列と前記第２の信号系列のやり取りを行う場合
には、前記ステップ（ｂ）は、該複数の基地局に対する
移動局の推定距離を各々算出し、得られた該複数の基地
局に対する移動局の推定距離から得られる複数の推定位
置エリアが重複するエリア内を移動局の位置と推定する
ことを特徴とする。In the present invention, the step (b)
Estimates the position of the mobile station within an estimated position area obtained by considering a predetermined error with respect to the position distant from the base station by the estimated distance in the service area of the base station, and in step (a), And each of the plurality of base stations and the first
When exchanging the second signal sequence with the second signal sequence, the step (b) calculates the estimated distance of the mobile station to the plurality of base stations, and calculates the estimated distances of the mobile stations to the plurality of base stations. It is characterized in that a position of the mobile station is estimated in an area where a plurality of estimated position areas obtained from the estimated distance of the mobile station overlap.

【００２３】また、本発明では、前記ステップ（ｂ）
は、基地局の移動局と通信中のセクタ内で基地局から前
記推定距離離れた位置に対し所定の誤差を考慮して得ら
れる推定位置エリア内を移動局の位置と推定し、前記ス
テップ（ａ）において移動局が複数の基地局の各々と前
記第１の信号系列と前記第２の信号系列のやり取りを行
う場合には、前記ステップ（ｂ）は、該複数の基地局に
対する移動局の推定距離を各々算出し、得られた該複数
の基地局に対する移動局の推定距離から得られる複数の
推定位置エリアが重複するエリア内を移動局の位置と推
定することを特徴とする。In the present invention, the step (b)
Estimating the position of the mobile station within an estimated position area obtained by considering a predetermined error with respect to the position at the estimated distance from the base station in a sector in communication with the mobile station of the base station; In the case where the mobile station exchanges the first signal sequence and the second signal sequence with each of a plurality of base stations in a), the step (b) includes the steps of: It is characterized in that each of the estimated distances is calculated, and a position of the mobile station is estimated in an area where a plurality of estimated position areas obtained from the obtained estimated distances of the mobile station to the plurality of base stations overlap.

【００２４】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局が送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、移動局に対して固有に予め決められた第２の信号系
列を、前記受信手段で受信した前記第１の信号系列に同
期して移動局に送信して、移動局が前記第１の信号系列
と前記第２の信号系列の位相差に基づいて基地局と移動
局の間の推定距離を算出して移動局の位置を推定できる
ようにする送信手段と、を有することを特徴とする基地
局装置を提供する。Also, according to the present invention, there is provided a base station apparatus in a base station of a cellular mobile communication system for performing communication between the mobile station and the base station, wherein the base station apparatus transmits the mobile station and is uniquely determined for the mobile station. Receiving means for receiving the first signal sequence, and a second signal sequence uniquely predetermined for the mobile station, the mobile station being synchronized with the first signal sequence received by the receiving means. Transmitting, so that the mobile station can calculate the estimated distance between the base station and the mobile station based on the phase difference between the first signal sequence and the second signal sequence and can estimate the position of the mobile station And a transmitting unit.

【００２５】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列に同
期して前記第２の信号系列を送信することを特徴とす
る。Also, in the present invention, when the receiving means receives a multipath signal, the transmitting means synchronizes with the first signal sequence received from the path having the shortest delay time to transmit the second signal. Is transmitted.

【００２６】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、基地局が送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、移動局に対して固有に予め決められた第２の信号系
列を、前記受信手段で受信した前記第１の信号系列に同
期して基地局に送信して、基地局が前記第１の信号系列
と前記第２の信号系列の位相差に基づいて基地局と移動
局の間の推定距離を算出して移動局の位置を推定できる
ようにする送信手段と、を有することを特徴とする移動
局装置を提供する。Also, according to the present invention, there is provided a mobile station device in a mobile station of a cellular mobile communication system for performing communication between the mobile station and the base station, wherein the mobile station device transmits the base station and is uniquely determined for the mobile station. Receiving means for receiving the first signal sequence, and a second signal sequence uniquely predetermined for the mobile station, the base station being synchronized with the first signal sequence received by the receiving means. Transmitting, so that the base station can calculate the estimated distance between the base station and the mobile station based on the phase difference between the first signal sequence and the second signal sequence and can estimate the position of the mobile station And a transmitting unit.

【００２７】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列に同
期して前記第２の信号系列を送信することを特徴とす
る。According to the present invention, when the receiving means receives a multipath signal, the transmitting means synchronizes with the first signal sequence received from the path having the shortest delay time. Is transmitted.

【００２８】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局に対し固有に予め決められた
第１の信号系列を移動局に送信する送信手段と、移動局
が送信する、移動局に対して固有に予め決められた第２
の信号系列を受信する受信手段と、前記送信手段で送信
した前記第１の信号系列と前記受信手段で受信した前記
第２の信号系列の位相を比較して位相差を求め、該位相
差に基づいて基地局と移動局の間の推定距離を算出して
移動局の位置を推定する位置推定手段と、を有すること
を特徴とする基地局装置を提供する。According to the present invention, there is provided a base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein the first signal sequence is predetermined uniquely for the mobile station. Transmitting means for transmitting to the mobile station, a second means for transmitting by the mobile station, which is uniquely determined for the mobile station.
Receiving means for receiving the signal sequence of the above, and comparing the phase of the first signal sequence transmitted by the transmitting means and the phase of the second signal sequence received by the receiving means to determine the phase difference, And a position estimating means for estimating a position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the base station apparatus.

【００２９】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記位相差を求めることを特徴とする。In the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path with the shortest delay time to perform the position estimation. It is characterized in that a phase difference is obtained.

【００３０】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、移動局に対し固有に予め決められた
第１の信号系列を基地局に送信する送信手段と、基地局
が送信する、移動局に対して固有に予め決められた第２
の信号系列を受信する受信手段と、前記送信手段で送信
した前記第１の信号系列と前記受信手段で受信した前記
第２の信号系列の位相を比較して位相差を求め、該位相
差に基づいて基地局と移動局の間の推定距離を算出して
移動局の位置を推定する位置推定手段と、を有すること
を特徴とする移動局装置を提供する。Further, according to the present invention, there is provided a mobile station device in a mobile station of a cellular mobile communication system for performing communication between the mobile station and a base station, wherein the first signal sequence is predetermined uniquely for the mobile station. Transmitting means for transmitting to the base station, a second means for transmitting by the base station, which is uniquely determined for the mobile station.
Receiving means for receiving the signal sequence of the above, and comparing the phase of the first signal sequence transmitted by the transmitting means and the phase of the second signal sequence received by the receiving means to determine the phase difference, And a position estimating means for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station on the basis of the base station.

【００３１】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記位相差を求めることを特徴とする。Further, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path with the shortest delay time to perform the position estimation. It is characterized in that a phase difference is obtained.

【００３２】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局に対し固有に予め決められた
第１の信号系列を移動局に送信する送信手段と、移動局
が送信する、移動局に対して固有に予め決められた第２
の信号系列と、移動局において求められた前記第１の信
号系列と第２の信号系列の位相差を示す第１の位相差の
情報を受信する受信手段と、前記送信手段で送信した前
記第１の信号系列と前記受信手段で受信した前記第２の
信号系列の位相を比較して第２の位相差を求め、前記受
信手段で受信した前記第１の位相差と該第２の位相差に
基づいて基地局と移動局の間の推定距離を算出して移動
局の位置を推定する位置推定手段と、を有することを特
徴とする基地局装置を提供する。Also, according to the present invention, there is provided a base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein the first signal sequence is predetermined uniquely for the mobile station. Transmitting means for transmitting to the mobile station, a second means for transmitting by the mobile station, which is uniquely determined for the mobile station.
Receiving means for receiving information of a first phase difference indicating a phase difference between the first signal sequence and the second signal sequence obtained in the mobile station, and the second signal transmitted by the transmitting means. 1 and the second signal sequence received by the receiving means are compared to obtain a second phase difference, and the first phase difference and the second phase difference received by the receiving means are compared. And a position estimating means for estimating a position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the base station apparatus.

【００３３】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記第２の位相差を求めることを特徴とす
る。Further, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to generate the second signal sequence. 2 is obtained.

【００３４】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、移動局に対し固有に予め決められた
第１の信号系列を基地局に送信する送信手段と、基地局
が送信する、移動局に対して固有に予め決められた第２
の信号系列と、基地局において求められた前記第１の信
号系列と第２の信号系列の位相差を示す第１の位相差の
情報を受信する受信手段と、前記送信手段で送信した前
記第１の信号系列と前記受信手段で受信した前記第２の
信号系列の位相を比較して第２の位相差を求め、前記受
信手段で受信した前記第１の位相差と該第２の位相差に
基づいて基地局と移動局の間の推定距離を算出して移動
局の位置を推定する位置推定手段と、を有することを特
徴とする移動局装置を提供する。Further, according to the present invention, there is provided a mobile station device in a mobile station of a cellular mobile communication system for performing communication between the mobile station and a base station, wherein the first signal sequence is predetermined uniquely for the mobile station. Transmitting means for transmitting to the base station, a second means for transmitting by the base station, which is uniquely determined for the mobile station.
Receiving means for receiving information of a first phase difference indicating a phase difference between the first signal sequence and the second signal sequence obtained in the base station; and 1 and the second signal sequence received by the receiving means are compared to obtain a second phase difference, and the first phase difference and the second phase difference received by the receiving means are compared. And a position estimating means for estimating a position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the mobile station apparatus.

【００３５】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記第２の位相差を求めることを特徴とす
る。Also, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path with the shortest delay time to generate the second signal sequence. 2 is obtained.

【００３６】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局が送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、前記受信手段で受信した前記第１の信号系列と移動
局に対して固有に予め決められた第２の信号系列の位相
を比較して第１の位相差を求め、前記第２の信号系列と
該第１の位相差の情報を移動局に送信して、移動局が前
記第１の信号系列と前記第２の信号系列の位相を比較し
て第２の位相差を求め、前記第１の位相差と該第２の位
相差に基づいて基地局と移動局の間の推定距離を算出し
て移動局の位置を推定できるようにする送信手段と、を
有することを特徴とする基地局装置を提供する。Also, according to the present invention, there is provided a base station apparatus in a base station of a cellular mobile communication system for performing communication between the mobile station and the base station, wherein the base station apparatus transmits the mobile station and is uniquely determined for the mobile station. Receiving means for receiving the first signal sequence, and comparing the first signal sequence received by the receiving means with the phase of a second signal sequence uniquely predetermined for the mobile station, and And the information of the second signal sequence and the first phase difference is transmitted to the mobile station, and the mobile station compares the phases of the first signal sequence and the second signal sequence. Transmission to obtain a second phase difference and calculate an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference so that the position of the mobile station can be estimated. Means for providing a base station apparatus.

【００３７】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列を使
用して前記第１の位相差を求めることを特徴とする。In the present invention, when the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to generate the first signal. Is determined.

【００３８】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、基地局か送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、前記受信手段で受信した前記第１の信号系列と移動
局に対して固有に予め決められた第２の信号系列の位相
を比較して第１の位相差を求め、前記第２の信号系列と
該第１の位相差の情報を基地局に送信して、基地局が前
記第１の信号系列と前記第２の信号系列の位相を比較し
て第２の位相差を求め、前記第１の位相差と該第２の位
相差に基づいて基地局と移動局の間の推定距離を算出し
て移動局の位置を推定できるようにする送信手段と、を
有することを特徴とする移動局装置を提供する。Further, according to the present invention, there is provided a mobile station device in a mobile station of a cellular mobile communication system for performing communication between the mobile station and the base station, wherein the mobile station device transmits from the base station and is uniquely determined for the mobile station. Receiving means for receiving the first signal sequence, and comparing the first signal sequence received by the receiving means with the phase of a second signal sequence uniquely predetermined for the mobile station, and , And transmits information of the second signal sequence and the first phase difference to a base station, and the base station compares the phases of the first signal sequence and the second signal sequence. Transmission to obtain a second phase difference and calculate an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference so that the position of the mobile station can be estimated. Means for providing a mobile station device.

【００３９】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列を使
用して前記第１の位相差を求めることを特徴とする。In the present invention, when the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to generate the first signal. Is determined.

【００４０】[0040]

【発明の実施の形態】以下、図面を用いて本発明の実施
の形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００４１】図１は、本発明の第１の実施形態に係る移
動通信における移動局位置推定方法を実施する移動局装
置１００および基地局装置２００の構成を示すブロック
図である。本実施形態は、移動局装置１００が基地局装
置２００からの距離を測定して位置を推定するものであ
る。FIG. 1 is a block diagram showing a configuration of a mobile station device 100 and a base station device 200 for implementing a mobile station position estimation method in mobile communication according to the first embodiment of the present invention. In the present embodiment, the mobile station apparatus 100 measures the distance from the base station apparatus 200 to estimate the position.

【００４２】移動局装置１００は、送信信号を生成する
送信信号生成部１０３、第１の固有の信号系列ＰＮ１を
発生するＰＮ１発生部１０１、第２の固有の信号系列Ｐ
Ｎ２を発生するＰＮ２発生部１０２、送信信号生成部１
０３からの送信信号とＰＮ１発生部１０１からの第１の
固有の信号系列ＰＮ１を使った所定のフォーマットの移
動局送信信号を求める送信信号処理部１０４、該送信信
号処理部１０４からの移動局送信信号をアンテナ１１１
を介して基地局に送信する送信部１０５、アンテナ１１
１を介して基地局からの基地局送信信号を受信する受信
部１０６、受信信号の位相を検出する位相検出部１０
７、受信信号と移動局送信信号の位相を比較して位相差
を算出する位相比較部１０８、位相比較部１０８からの
位相差に基づいて移動局装置１００と基地局装置２００
の間の距離を算出する距離算出部１０９、およびこの算
出された距離に基づいて移動局装置１００の位置を推定
する位置推定部１１０から構成されている。Mobile station apparatus 100 includes transmission signal generation section 103 for generating a transmission signal, PN1 generation section 101 for generating first unique signal sequence PN1, and second unique signal sequence P
PN2 generator 102 for generating N2, transmission signal generator 1
A transmission signal processing unit 104 for obtaining a mobile station transmission signal of a predetermined format using the transmission signal from the NN 03 and the first unique signal sequence PN1 from the PN1 generation unit 101, and the mobile station transmission from the transmission signal processing unit 104 Signal to antenna 111
Transmitting section 105 for transmitting to the base station via the antenna 11
Receiving section 106 for receiving a base station transmission signal from a base station via a base station 1 and phase detecting section 10 for detecting the phase of the received signal
7. A phase comparison unit 108 that compares the phase of the received signal with the phase of the mobile station transmission signal to calculate a phase difference, and based on the phase difference from the phase comparison unit 108,
And a position estimating unit 110 that estimates the position of the mobile station device 100 based on the calculated distance.

【００４３】また、基地局装置２００は、アンテナ２１
１を介して移動局からの移動局送信信号を受信する受信
部２０６、該受信部で受信した受信信号の位相を検出す
る位相検出部２０７、第１の固有の信号系列ＰＮ１を発
生するＰＮ１発生部２０１、第２の固有の信号系列ＰＮ
２を発生するＰＮ２発生部２０２、送信信号を生成する
送信信号生成部２０３、基地局の位置情報を生成する基
地局位置情報生成部２０８、送信信号生成部２０３から
の送信信号とＰＮ２発生部２０２からの第２の固有の信
号系列ＰＮ２と基地局位置情報生成部２０８からの位置
情報を使った所定のフォーマットの基地局送信信号を求
める送信信号処理部２０４、移動局からの受信信号に同
期して基地局送信信号を移動局に送信する同期送信部２
０５から構成されている。The base station device 200 is connected to the antenna 21
1, a receiving unit 206 for receiving a mobile station transmission signal from a mobile station, a phase detecting unit 207 for detecting the phase of the received signal received by the receiving unit, and a PN1 generation for generating a first unique signal sequence PN1. Unit 201, second unique signal sequence PN
2, a transmission signal generation unit 203 for generating a transmission signal, a base station position information generation unit 208 for generating base station position information, and a transmission signal from the transmission signal generation unit 203 and a PN2 generation unit 202. A transmission signal processing section 204 for obtaining a base station transmission signal of a predetermined format using the second unique signal sequence PN2 from the base station and the position information from the base station position information generation section 208, synchronizes with a reception signal from the mobile station. Transmitting unit 2 for transmitting a base station transmission signal to a mobile station
05.

【００４４】なお、第１の固有の信号系列ＰＮ１と第２
の固有の信号系列ＰＮ２は各移動局毎に予め決められて
いる信号系列である。Note that the first unique signal sequence PN1 and the second
Is a signal sequence determined in advance for each mobile station.

【００４５】以上のように構成される移動局装置および
基地局装置において、移動局の位置を推定するのは、例
えば移動局が緊急電話を発信したとき、移動局のユーザ
が自分の位置を確認したいとき、固定網または別の移動
局のユーザが本移動局の位置を確認したいとき等が考え
られる。移動局が緊急電話を発信したときは、発信の手
順の中で以下の手順により位置推定を行うことができ
る。移動局のユーザが自分の位置を確認したいときは、
ユーザが移動局装置に位置確認要求信号を出す。移動局
装置は、この位置確認要求信号を受信すると以下の手順
を開始する。固定網または別の移動局のユーザが本移動
局の位置を確認したいときは、位置確認要求信号が、本
移動局と通信中の基地局から送信される。本移動局はこ
の位置確認要求信号を受信すると以下の手順を開始す
る。In the mobile station apparatus and the base station apparatus configured as described above, the position of the mobile station is estimated, for example, when the mobile station makes an emergency call, the user of the mobile station confirms his / her own position. For example, a user of the fixed network or another mobile station may want to confirm the position of the mobile station. When the mobile station makes an emergency call, position estimation can be performed by the following procedure in the procedure for making a call. When a mobile station user wants to confirm his location,
The user issues a position confirmation request signal to the mobile station device. Upon receiving the position confirmation request signal, the mobile station device starts the following procedure. When a user of the fixed network or another mobile station wants to confirm the position of the mobile station, a position confirmation request signal is transmitted from the base station communicating with the mobile station. Upon receiving the position confirmation request signal, the mobile station starts the following procedure.

【００４６】移動局装置１００は、位置確認の要求を受
け取ると、位置推定のための第１の固有の信号系列ＰＮ
１をＰＮ１発生部１０１で発生する。送信信号処理部１
０４は、必要に応じてその他の送信信号と併せてこの信
号系列ＰＮ１を所定の信号フォーマットに変換する。送
信部１０５はこの信号をアンテナ１１１を介して基地局
装置２００へ送信する。この信号を位置推定基準信号と
呼ぶ。Upon receiving the request for position confirmation, mobile station apparatus 100 receives first unique signal sequence PN for position estimation.
1 is generated by the PN1 generator 101. Transmission signal processing unit 1
04 converts this signal sequence PN1 into a predetermined signal format together with other transmission signals as necessary. Transmitting section 105 transmits this signal to base station apparatus 200 via antenna 111. This signal is called a position estimation reference signal.

【００４７】基地局装置２００の受信部２０６は、移動
局から位置推定基準信号をアンテナ２１１を介して受信
すると、ＰＮ１発生部２０１で信号系列ＰＮ１を発生
し、位相検出部２０７で受信した基準信号のＰＮ１の位
相を検出する。次にＰＮ２発生部２０２で第２の固有の
信号系列ＰＮ２を発生し、送信信号処理部２０４で、基
地局位置情報生成部２０８が発生した位置情報と送信信
号生成部２０３が生成したその他の送信信号と併せてＰ
Ｎ２を所定の信号フォーマットに変換し、同期送信部２
０５で受信したＰＮ１の位相に同期して移動局装置１０
０へ送信する。この信号を位置推定応答信号と呼ぶ。基
地局位置情報は、例えば、基地局の緯度、経度、海抜高
度の情報である。Receiving section 206 of base station apparatus 200 receives a position estimation reference signal from a mobile station via antenna 211, generates signal sequence PN1 in PN1 generating section 201, and outputs the reference signal received in phase detecting section 207. PN1 is detected. Next, a PN2 generation unit 202 generates a second unique signal sequence PN2, and a transmission signal processing unit 204 generates position information generated by the base station position information generation unit 208 and another transmission generated by the transmission signal generation unit 203. P together with the signal
N2 is converted into a predetermined signal format,
Mobile station device 10 in synchronization with the phase of PN1 received at 05.
Send to 0. This signal is called a position estimation response signal. The base station position information is, for example, information on the latitude, longitude, and altitude of the base station.

【００４８】移動局装置１００の受信部１０６は、基地
局から位置推定応答信号を受信すると、ＰＮ２発生部１
０２で信号系列ＰＮ２を発生し、位相検出部１０７で受
信した応答信号のＰＮ２の位相を検出する。位相比較部
１０８は、送信部１０５が送信した基準信号のＰＮ１の
位相と、受信した応答信号のＰＮ２の位相を比較し、位
相差を検出する。距離算出部１０９は、この位相差か
ら、基地局装置２００と移動局装置１００の間の距離を
算出する。位置推定部１１０は、距離算出部１０９が算
出した距離と、受信部１０６が受信した基地局装置２０
０の位置情報から移動局の位置を推定する。Receiving section 106 of mobile station apparatus 100, upon receiving the position estimation response signal from the base station, PN2 generating section 1
In step 02, a signal sequence PN2 is generated, and the phase detector 107 detects the phase of PN2 of the received response signal. Phase comparing section 108 compares the phase of PN1 of the reference signal transmitted by transmitting section 105 with the phase of PN2 of the received response signal, and detects a phase difference. Distance calculating section 109 calculates the distance between base station apparatus 200 and mobile station apparatus 100 from the phase difference. The position estimating unit 110 compares the distance calculated by the distance calculating unit 109 with the base station device 20 received by the receiving unit 106.
The position of the mobile station is estimated from the 0 position information.

【００４９】図２は、図１の実施形態により基地局と移
動局の間の距離を算出する原理を説明するためのタイミ
ングチャートである。同図は、固有の信号系列ＰＮ１，
ＰＮ２の周期が等しい場合の例である。ＰＮ１，ＰＮ２
は伝搬時間を測定するためのマーカ信号であり、位置推
定期間中常時連続送信する必要はない。例えば、フレー
ム同期信号のように周期的に送信する信号をＰＮ１，Ｐ
Ｎ２として使用することができる。移動局装置１００が
送信した位置推定基準信号は上り伝搬路の伝搬時間だけ
遅延して基地局装置２００に受信される。基地局装置２
００は、受信した基準信号に同期して位置推定応答信号
を送信する。移動局装置１００は、この応答信号を、下
り伝搬路の伝搬時間だけ遅延して受信し、送信した基準
信号の位相と受信した応答信号の位相を比較する。ここ
で、測定した位相差を時間に換算してａ［ｓｅｃ］とす
る。ａは往復の伝搬遅延時間である。従って、移動局装
置１００と基地局装置２００の間の距離Ｄは、 Ｄ＝ａｃ／２［ｍ］ 但しｃは光速（約３×１０8 ｍ／ｓ）、である。FIG. 2 is a timing chart for explaining the principle of calculating the distance between the base station and the mobile station according to the embodiment of FIG. The figure shows a unique signal sequence PN1,
This is an example where the periods of PN2 are equal. PN1, PN2
Is a marker signal for measuring the propagation time, and does not need to be continuously transmitted during the position estimation period. For example, signals transmitted periodically, such as a frame synchronization signal, are PN1 and P2.
It can be used as N2. The position estimation reference signal transmitted by mobile station apparatus 100 is received by base station apparatus 200 after being delayed by the propagation time of the uplink propagation path. Base station device 2
00 transmits a position estimation response signal in synchronization with the received reference signal. The mobile station device 100 receives this response signal with a delay by the propagation time of the downlink propagation path, and compares the phase of the transmitted reference signal with the phase of the received response signal. Here, the measured phase difference is converted into time and set to a [sec]. a is a round-trip propagation delay time. Therefore, the distance D between the mobile station device 100 and the base station device 200 is D = ac / 2 [m] where c is the speed of light (about 3 × 10 8 m / s).

【００５０】図３は、本実施形態により移動局の位置を
推定する方法を説明するための図である。移動局装置１
００は、基地局装置２００から距離Ｄの円弧上に存在す
ると推定できる。実際には、位相差の測定には誤差が含
まれる。例えば、時間に換算した位相差の誤差を考慮し
てａ±α［ｓｅｃ］とすると、距離Ｄは （ａ±α）ｃ＝Ｄ±αｃ＝Ｄ±δ となる。但し、δ＝αｃである。この場合の推定位置
は、図３のハッチング部分になる。FIG. 3 is a diagram for explaining a method for estimating the position of a mobile station according to the present embodiment. Mobile station device 1
00 can be estimated to be on an arc at a distance D from the base station apparatus 200. In practice, the measurement of the phase difference includes an error. For example, if a ± α [sec] is considered in consideration of the error of the phase difference converted into time, the distance D is (a ± α) c = D ± αc = D ± δ. Here, δ = αc. The estimated position in this case is a hatched portion in FIG.

【００５１】移動局が複数の基地局との間の距離を測定
すれば、推定位置の精度の向上が期待できる。図４は、
２局の基地局からの距離が測定できたときの例である。
移動局装置１００は、まず基地局装置２００との間で上
記手順により距離を測定する。移動局装置１００と基地
局装置２００の間の距離が誤差を含めてＤ1 ±δ
1 ［ｍ］とすると、第１の推定エリア（基地局装置２０
０を中心とする円弧状の薄いハッチングエリア）が得ら
れる。次に基地局装置３００との間で同様の手順により
距離を測定する。移動局装置１００と基地局装置３００
の間の測定距離が誤差を含めてＤ2 ±δ2 ［ｍ］とする
と、第２の推定エリア（基地局装置３００を中心とする
円弧状の薄いハッチングエリア）が得られる。移動局装
置１００の推定位置は、第１の推定エリアと第２の推定
エリアの重なる部分（ダブルハッチングエリア）にな
る。If the mobile station measures the distance between a plurality of base stations, the accuracy of the estimated position can be expected to be improved. FIG.
This is an example when distances from two base stations can be measured.
The mobile station device 100 first measures the distance with the base station device 200 according to the above procedure. When the distance between the mobile station device 100 and the base station device 200 includes an error, D 1 ± δ
1 [m], the first estimated area (the base station device 20
An arc-shaped thin hatching area centered at 0 is obtained. Next, the distance is measured with the base station device 300 by the same procedure. Mobile station device 100 and base station device 300
Assuming that the measurement distance between them includes D 2 ± δ 2 [m] including an error, a second estimated area (a thin hatched area in an arc shape centered on the base station apparatus 300) is obtained. The estimated position of the mobile station device 100 is a portion (double hatched area) where the first estimated area and the second estimated area overlap.

【００５２】また、基地局装置２００，３００が複数の
セクタによりセルをカバーしている場合には、図５およ
び図６に示すように、基地局装置２００，３００の通信
中のセクタ内において移動局装置１００の位置推定を行
うことで、推定位置の精度の向上が期待できる。When base station apparatuses 200 and 300 cover a cell with a plurality of sectors, as shown in FIG. 5 and FIG. 6, mobile stations move within sectors where base station apparatuses 200 and 300 are communicating. By performing the position estimation of the station device 100, an improvement in the accuracy of the estimated position can be expected.

【００５３】図７は、本発明の第２の実施形態に係る移
動通信における移動局位置推定方法を実施する移動局装
置１００と基地局装置２００の構成を示すブロック図で
ある。本発明の第２の実施形態は、移動局装置１００の
構成が図１に示したものと同じであり、基地局装置２０
０の構成が図１に示したものに対して位相比較部２０９
が新たに設けられている点と送信部２０５が同期送信を
行うものでない点のみが異なるものであり、同じ構成要
素には同じ符号が付されている。FIG. 7 is a block diagram showing a configuration of a mobile station device 100 and a base station device 200 for implementing the mobile station position estimating method in mobile communication according to the second embodiment of the present invention. In the second embodiment of the present invention, the configuration of the mobile station device 100 is the same as that shown in FIG.
0 is different from that shown in FIG.
Are different only in that the transmission unit 205 does not perform synchronous transmission, and the same components are denoted by the same reference numerals.

【００５４】本実施形態では、移動局装置１００の最初
の動作は第１の実施形態の場合と同じである。すなわ
ち、移動局装置１００は、位置確認の要求を受け取ると
位置推定のための第１の固有の信号系列ＰＮ１をＰＮ１
発生部１０１で発生する。送信信号処理部１０４は必要
に応じてその他の信号と併せてこの信号系列ＰＮ１を所
定の信号フォーマットに変換する。送信部１０５は、こ
の信号をアンテナ１１１を介して基地局装置２００に送
信する。この信号を位置推定基準信号と呼ぶ。In the present embodiment, the initial operation of the mobile station device 100 is the same as in the first embodiment. That is, when receiving the request for position confirmation, the mobile station device 100 converts the first unique signal sequence PN1 for position estimation into PN1.
It is generated by the generator 101. The transmission signal processing unit 104 converts the signal sequence PN1 into a predetermined signal format together with other signals as necessary. Transmitting section 105 transmits this signal to base station apparatus 200 via antenna 111. This signal is called a position estimation reference signal.

【００５５】基地局装置２００の受信部２０６は、移動
局から位置推定基準信号を受信すると、ＰＮ１発生部２
０１で信号系列ＰＮ１を発生し、位相検出部２０７で受
信した基準信号のＰＮ１の位相を検出する。次に位相比
較部２０９で、送信する信号にのせる第２の固有の信号
系列ＰＮ２の位相と、検出した基準信号のＰＮ１の位相
を比較し、第１の位相差を求める。送信信号処理部２０
４は、この第１の位相差の情報と信号系列ＰＮ２と、基
地局の位置情報と、その他の送信信号を併せて所定の信
号フォーマットに変換する。送信部２０５は、この信号
をアンテナ２１１を介して移動局装置１００へ送信す
る。この信号を位置推定応答信号と呼ぶ。Upon receiving the position estimation reference signal from the mobile station, receiving section 206 of base station apparatus 200 receives PN1 generating section 2
In step 01, a signal sequence PN1 is generated, and the phase detector 207 detects the phase of PN1 of the received reference signal. Next, the phase comparison unit 209 compares the phase of the second unique signal sequence PN2 to be put on the signal to be transmitted with the phase of the detected reference signal PN1 to obtain a first phase difference. Transmission signal processing unit 20
4 converts the information of the first phase difference, the signal sequence PN2, the position information of the base station, and other transmission signals into a predetermined signal format. Transmitting section 205 transmits this signal to mobile station apparatus 100 via antenna 211. This signal is called a position estimation response signal.

【００５６】移動局装置１００の受信部１０６は、基地
局から位置推定応答信号を受信すると、ＰＮ２発生部１
０２で信号系列ＰＮ２を発生し、位相検出部１０７で受
信した応答信号のＰＮ２の位相を検出する。位相比較部
１０８は、送信部１０５が送信した基準信号のＰＮ１の
位相と受信した応答信号のＰＮ２の位相を比較し、第２
の位相差を算出する。距離算出部１０９は、位相比較部
１０８が求めた第２の位相差の情報と受信部１０６が受
信した第１の位相差の情報から基地局と移動局の間の距
離を算出する。位置推定部１１０は、距離算出部１０９
が算出した距離と、受信部１０６が受信した基地局の位
置情報から、移動局装置１００の位置を推定する。Receiving section 106 of mobile station apparatus 100, upon receiving the position estimation response signal from the base station, PN2 generating section 1
In step 02, a signal sequence PN2 is generated, and the phase detector 107 detects the phase of PN2 of the received response signal. The phase comparing unit 108 compares the phase of PN1 of the reference signal transmitted by the transmitting unit 105 with the phase of PN2 of the received response signal,
Is calculated. Distance calculating section 109 calculates the distance between the base station and the mobile station from the information on the second phase difference obtained by phase comparing section 108 and the information on the first phase difference received by receiving section 106. The position estimating unit 110 includes a distance calculating unit 109
The position of the mobile station device 100 is estimated from the calculated distance and the position information of the base station received by the receiving unit 106.

【００５７】図８は、図７の実施形態により基地局と移
動局の間の距離を算出する原理を説明するためのタイミ
ングチャートである。移動局装置１００が送信した位置
推定基準信号が、上り伝搬路の伝搬時間だけ遅延して基
地局装置２００に受信されるのは、第１の実施形態の場
合と同じである。しかし、本実施形態では、基地局は受
信した基準信号に同期することなく、独立のタイミング
で位置推定応答信号を送信する。但し、送信する応答信
号と受信した基準信号の位相差（第１の位相差）を測定
し、その情報を応答信号にのせる。移動局は、この応答
信号を下り伝搬路の伝搬時間だけ遅延して受信し、送信
した基準信号の位相と受信した応答信号の位相の位相差
（第２の位相差）を測定する。ここで、第１の位相差と
第２の位相差をそれぞれ時間に換算してａ［ｓｅｃ］，
ｂ［ｓｅｃ］とする。また、固有の信号系列ＰＮ１とＰ
Ｎ２の周期を等しくし、ｇ［ｓｅｃ］とする。このと
き、ｄ（＝（ａ＋ｂ）−ｇ）は、往復の伝搬遅延時間に
なる。従って、移動局と基地局の間の距離Ｄは、 Ｄ＝ｃｄ／２［ｍ］ となる。移動局と基地局の間の距離がわかれば、移動局
の位置を推定する方法は第１の実施形態と同じである。FIG. 8 is a timing chart for explaining the principle of calculating the distance between the base station and the mobile station according to the embodiment of FIG. The fact that the position estimation reference signal transmitted by the mobile station apparatus 100 is received by the base station apparatus 200 after being delayed by the propagation time of the uplink propagation path is the same as in the first embodiment. However, in the present embodiment, the base station transmits the position estimation response signal at an independent timing without synchronizing with the received reference signal. However, the phase difference (first phase difference) between the response signal to be transmitted and the received reference signal is measured, and the information is included in the response signal. The mobile station receives this response signal after delaying it by the propagation time of the downlink propagation path, and measures the phase difference (second phase difference) between the phase of the transmitted reference signal and the phase of the received response signal. Here, the first phase difference and the second phase difference are respectively converted into time to obtain a [sec],
Let b [sec]. Also, unique signal sequences PN1 and P
The period of N2 is made equal, and is set to g [sec]. At this time, d (= (a + b) -g) is a round-trip propagation delay time. Therefore, the distance D between the mobile station and the base station is D = cd / 2 [m]. If the distance between the mobile station and the base station is known, the method of estimating the position of the mobile station is the same as in the first embodiment.

【００５８】本発明の位置推定方法は、無線伝送路の伝
送速度が速いほど、位相差測定の精度が高くなり有効で
ある。ＣＤＭＡの拡散符号は、情報の伝送速度が遅いと
きも速いチップレートを提供するため、本発明の固有の
信号系列としてＣＤＭＡの拡散符号を用いる方法が考え
られる。この場合、図１および図７のそれぞれの移動局
装置、基地局装置の送信信号処理部は、固有の信号系列
であるＣＤＭＡの拡散符号により基地局位置情報または
その他の送信信号（送信信号がない場合はダミー信号）
を拡散する処理を行い、これを位置推定基準信号，位置
推定応答信号として送信部から送信するか、または所定
のフォーマットの位置推定基準信号，位置推定応答信号
の中に固有の信号系列であるＣＤＭＡの拡散符号を含め
て送信部から送信する。The position estimating method of the present invention is more effective because the higher the transmission speed of the radio transmission line, the higher the accuracy of the phase difference measurement. Since the CDMA spreading code provides a high chip rate even when the information transmission rate is low, a method of using the CDMA spreading code as the unique signal sequence of the present invention is conceivable. In this case, the transmission signal processing unit of each of the mobile station apparatus and the base station apparatus in FIG. 1 and FIG. 7 uses base station position information or other transmission signals (there is no transmission signal) by using a CDMA spreading code that is a unique signal sequence. If it is a dummy signal)
Is transmitted from the transmitter as a position estimation reference signal and a position estimation response signal, or a CDMA that is a signal sequence unique to the position estimation reference signal and the position estimation response signal in a predetermined format. Is transmitted from the transmission unit including the spreading code of

【００５９】上記の２つの実施形態では、移動局装置が
距離を測定し位置を推定したが、基地局装置と移動局装
置を読み替えれば基地局が距離を測定し位置を推定する
方法も同様にできることがわかる。但し、このとき複数
の基地局を用いて位置を推定する場合は、基地局間で情
報の送受信を行い、各基地局の測定距離、位置情報を集
めて推定位置を求めなければならない。基地局装置が距
離を測定する方法は、基地局の負担が大きくなるが、無
線区間の信号量を低減できる。すなわち、一般のセルラ
移動通信では、基地局は規制情報、チャネルの構造の情
報等を報知チャネルを使って送信している。この報知チ
ャネルに固有の信号系列をのせれば、位置推定のために
必要な無線信号は移動局が送信する１信号のみとなり効
率的である。ＣＤＭＡ移動通信で固有の信号系列として
拡散符号を使う場合は、これは元々報知チャネルで送信
される情報中に含まれているため、報知チャネルに新た
な情報要素を追加することすら不要である。In the above two embodiments, the mobile station device measures the distance and estimates the position. However, if the base station device and the mobile station device are replaced with each other, the method of measuring the distance and estimating the position by the base station is the same. You can see that it can be done. However, when estimating the position using a plurality of base stations at this time, information must be transmitted and received between the base stations, and the estimated position must be obtained by collecting the measured distance and position information of each base station. The method in which the base station device measures the distance increases the burden on the base station, but can reduce the signal amount in the wireless section. That is, in general cellular mobile communication, a base station transmits regulation information, information on a channel structure, and the like using a broadcast channel. If a signal sequence unique to this broadcast channel is placed, only one signal transmitted by the mobile station is required for the position estimation, which is efficient. When a spreading code is used as a unique signal sequence in CDMA mobile communication, since it is originally included in information transmitted on a broadcast channel, it is not even necessary to add a new information element to the broadcast channel.

【００６０】また、位置推定のために往復の信号を用意
する場合も報知チャネルを利用することで推定精度を向
上できる。図９は本発明の第３の実施形態の無線区間の
送受信信号を示す図である。基地局は報知情報に固有の
信号系列ＰＮ３をのせて放送している。この基地局と通
信可能な全ての移動局はこの報知チャネルを受信でき
る。移動局は、受信した報知チャネルの信号系列ＰＮ３
の位相と、送信する位置推定基準信号にのせる固有の信
号系列ＰＮ１の位相の位相差（第１の位相差）ａを測定
し、位置推定基準信号にａとＰＮ１をのせて送信する。
基地局は、受信した基準信号のＰＮ１の位相と送信した
報知情報のＰＮ３の位相の位相差（第２の位相差）ｂお
よび受信した基準信号のＰＮ１の位相と送信する位置推
定応答信号の固有の信号系列ＰＮ２の位相の位相差（第
３の位相差）ｅを測定し、ａとｂから推定距離ｄ1 を算
出する。また、応答信号に、ｅ，ｄ1 ，ＰＮ２をのせて
送信する。移動局は、受信した応答信号のＰＮ２の位相
と送信した基準信号のＰＮ１の位相の位相差（第４の位
相差）ｆを測定し、ｅとｆから推定距離ｄ2 を算出す
る。得られたｄ1 とｄ2 を平均して推定距離とする。ｄ
1 とｄ2 の信頼度を求め重み付平均を取る方法もある。
ＰＮ２とＰＮ３の位相に関連がある場合、ｄ2 を求める
ときａ，ｂの情報を使うこともできる。Also, when a round-trip signal is prepared for position estimation, the estimation accuracy can be improved by using the broadcast channel. FIG. 9 is a diagram showing transmission / reception signals in a wireless section according to the third embodiment of the present invention. The base station broadcasts with the signal sequence PN3 specific to the broadcast information. All mobile stations that can communicate with this base station can receive this broadcast channel. The mobile station receives the signal sequence PN3 of the received broadcast channel.
And the phase difference (first phase difference) a between the phase of the unique signal sequence PN1 and the phase estimation reference signal to be transmitted are measured, and a and PN1 are put on the position estimation reference signal and transmitted.
The base station transmits a phase difference (second phase difference) b between the phase of PN1 of the received reference signal and the phase of PN3 of the transmitted broadcast information, the phase of PN1 of the received reference signal, and the uniqueness of the position estimation response signal to be transmitted. the phase of the phase difference between the signal sequence PN2 measured (third retardation) e, and calculates the estimated distance d 1 from a and b. Further, e, d 1 and PN2 are put on the response signal and transmitted. The mobile station measures the phase difference (fourth retardation) f of PN1 of the phase of the reference signal transmitted with PN2 phase of the received response signal, and calculates the estimated distance d 2 from e and f. The obtained d 1 and d 2 are averaged to obtain an estimated distance. d
There is also a method of obtaining the reliability of 1 and d 2 and taking a weighted average.
If there is associated with the phase of PN2 and PN3, it is also possible to use a, the information of b when determining the d 2.

【００６１】図１０は、図９の実施形態により基地局と
移動局の間の距離を算出する方法を説明するためのタイ
ミングチャートである。各信号はすでに説明しているの
で、ここでは説明しない。基地局は、時間に換算した位
相差情報ａ，ｂを用い、伝搬遅延時間ｄ1 、移動局−基
地局間距離Ｄ1 を次式により計算する。FIG. 10 is a timing chart for explaining a method of calculating the distance between the base station and the mobile station according to the embodiment of FIG. Since each signal has already been described, it will not be described here. The base station calculates the propagation delay time d 1 and the distance D 1 between the mobile station and the base station using the phase difference information a and b converted into time by the following equation.

【００６２】ｄ1 ＝（ａ＋ｂ）−ｇ Ｄ1 ＝ｃｄ1 ／２ 移動局は、時間に換算した、位相差情報ｅ，ｆを用い、
伝搬遅延時間ｄ2 、移動局−基地局間距離Ｄ2 を次式に
より計算する。[0062] d 1 = (a + b) -g D 1 = cd 1/2 mobile station in terms of time, using the phase difference information e, f,
The propagation delay time d 2 and the distance D 2 between the mobile station and the base station are calculated by the following equation.

【００６３】ｄ2 ＝（ｅ＋ｆ）−ｇ Ｄ2 ＝ｃｄ2 ／２ 移動局は、Ｄ1 とＤ2 を平均して推定距離Ｄとする。 Ｄ＝（Ｄ1 ＋Ｄ2 ）／２ 実際には、各無線信号の受信レベルが異なり、またマル
チパスの発生状況等も異なるため、ａ，ｂ，ｅ，ｆは信
頼度が異なる。そこで、Ｄ1 とＤ2 の信頼度を求め、重
み付き平均を求める方法もある。[0063] d 2 = (e + f) -g D 2 = cd 2/2 mobile station, the estimated distance D by averaging the D 1 and D 2. D = (D 1 + D 2 ) / 2 Actually, a, b, e, and f have different degrees of reliability because the reception level of each radio signal is different and the occurrence of multipath is also different. Therefore, there is a method of obtaining the reliability of D 1 and D 2 and obtaining a weighted average.

【００６４】本実施形態では、移動局は報知チャネルの
ＰＮ３と送信信号のＰＮ１の位相差を測定したが、第１
の実施形態と同様に、移動局はＰＮ３に同期してＰＮ１
を送信してもよい。その場合の距離算出方法は第１の実
施形態と同じになる。In the present embodiment, the mobile station measures the phase difference between PN3 of the broadcast channel and PN1 of the transmission signal.
The mobile station synchronizes with PN3 and PN1
May be transmitted. The method of calculating the distance in that case is the same as in the first embodiment.

【００６５】複数の基地局を使って位置推定を行う場
合、移動局は、個々の基地局との間でそれぞれ、位置推
定基準信号、位置推定応答信号の送受信が必要であり、
無線区間の信号が増大する。また、距離測定の時刻がず
れるため、位置推定精度が劣化する場合がある。そこ
で、移動局が各基地局へ送信する信号を複数チャネル符
号多重して同時にマルチコード送信とする方法が有効で
ある。また、送信チャネルをスロットに分割し、各基地
局へ送信する信号をフレーム構成のチャネルに時分割多
重して送信する方法もある。When performing position estimation using a plurality of base stations, the mobile station needs to transmit and receive a position estimation reference signal and a position estimation response signal to and from each base station, respectively.
The signal in the wireless section increases. Further, since the time of the distance measurement is shifted, the position estimation accuracy may be deteriorated. Therefore, it is effective to use a method in which a mobile station code-multiplexes a signal to be transmitted to each base station on a plurality of channels and simultaneously performs multi-code transmission. There is also a method in which a transmission channel is divided into slots, and a signal to be transmitted to each base station is time-division multiplexed and transmitted to a frame-structured channel.

【００６６】実際には、受信信号は複数の伝搬路（マル
チパス）を経た信号が重畳されている。本発明の方法
は、直接波の位相を測定できたときに正確な位置推定が
可能である。マルチパス環境では、最も遅延時間の短い
信号を抽出し、位相を測定することで誤差を小さくでき
る。従って、図１および図７の移動局装置および基地局
装置の位相検出部は、最も遅延時間の短い信号の受信タ
イミング情報を受信部から受け取り位相を検出する。Ｃ
ＤＭＡ移動通信でＲＡＫＥ受信機を使用する場合は、最
も遅延時間の短いフィンガのタイミングを使用する。但
し、位相の確認、信号の判定等はＲＡＫＥ合成後の信号
を用いてもよい。In practice, a received signal is superimposed on a signal that has passed through a plurality of propagation paths (multipaths). The method of the present invention enables accurate position estimation when the phase of a direct wave can be measured. In a multipath environment, the error can be reduced by extracting the signal with the shortest delay time and measuring the phase. Therefore, the phase detection units of the mobile station device and the base station device in FIGS. 1 and 7 receive the reception timing information of the signal with the shortest delay time from the reception unit and detect the phase. C
When using a RAKE receiver in DMA mobile communication, the timing of the finger with the shortest delay time is used. However, the signal after the RAKE combination may be used for checking the phase, determining the signal, and the like.

【００６７】[0067]

【発明の効果】以上説明したように、本発明によれば、
基地局と移動局の一方の局から送信された第１の固有の
信号系列に同期して他方の局は第２の固有の信号系列を
送信し、一方の局は第１および第２の固有の信号系列の
位相差に基づいて基地局と移動局との間の推定距離を算
出して移動局の位置を推定するので、基地局間が同期し
ていないセルラ移動通信においても移動局の位置を簡易
に推定することができる。As described above, according to the present invention,
In synchronization with a first unique signal sequence transmitted from one of the base station and the mobile station, the other station transmits a second unique signal sequence, and one station transmits the first and second unique signal sequences. Since the position of the mobile station is estimated by calculating the estimated distance between the base station and the mobile station based on the phase difference of the signal sequence of the mobile station, the position of the mobile station can be determined even in cellular mobile communication in which the base stations are not synchronized. Can be easily estimated.

【００６８】また、本発明によれば、基地局と移動局の
一方の局は他方の局へ第１の固有の信号系列を送信し、
他方の局は第１の固有の信号系列と送信する第２の固有
の信号系列の第１の位相差を算出し、この第１の位相差
の情報と第２の固有の信号系列を第１の固有の信号系列
に同期させることなく一方の局に送信し、一方の局は第
１の固有の信号系列と受信した第２の固有の信号系列の
第２の位相差を算出し、第１の位相差と第２の位相差の
情報を用いて基地局と移動局との間の推定距離を算出し
て移動局の位置を推定するので、基地局間が同期してい
ないセルラ移動通信においても移動局の位置を簡易に推
定することができる。According to the present invention, one of the base station and the mobile station transmits a first unique signal sequence to the other station,
The other station calculates a first phase difference between the first unique signal sequence and the second unique signal sequence to be transmitted, and calculates the information on the first phase difference and the second unique signal sequence into the first unique signal sequence. And transmits to one station without synchronizing with the first unique signal sequence, and one station calculates a second phase difference between the first unique signal sequence and the received second unique signal sequence, The position of the mobile station is estimated by calculating the estimated distance between the base station and the mobile station by using the information on the phase difference and the second phase difference. Can also easily estimate the position of the mobile station.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１の実施形態に係る移動通信におけ
る移動局位置推定方法を実施する移動局装置と基地局装
置の構成を示すブロック図。FIG. 1 is a block diagram showing a configuration of a mobile station device and a base station device that execute a mobile station position estimation method in mobile communication according to a first embodiment of the present invention.

【図２】図１に示す第１の実施形態において基地局と移
動局の間の距離を算出する原理を説明するためのタイミ
ングチャート。FIG. 2 is a timing chart for explaining a principle of calculating a distance between a base station and a mobile station in the first embodiment shown in FIG.

【図３】図１に示す第１の実施形態において移動局の位
置を推定する方法の一例を説明するための図。FIG. 3 is an exemplary view for explaining an example of a method for estimating a position of a mobile station in the first embodiment shown in FIG. 1;

【図４】図１に示す第１の実施形態において２局の基地
局からの距離が測定できたときの移動局の位置を推定す
る方法の一例を説明するための図。FIG. 4 is an exemplary view for explaining an example of a method of estimating a position of a mobile station when a distance from two base stations can be measured in the first embodiment shown in FIG. 1;

【図５】図１に示す第１の実施形態において移動局の位
置を推定する方法の他の例を説明するための図。FIG. 5 is a diagram for explaining another example of a method for estimating the position of the mobile station in the first embodiment shown in FIG.

【図６】図１に示す第１の実施形態において２局の基地
局からの距離が測定できたときの移動局の位置を推定す
る方法の他の例を説明するための図。FIG. 6 is a view for explaining another example of a method for estimating the position of a mobile station when the distances from two base stations can be measured in the first embodiment shown in FIG. 1;

【図７】本発明の第２の実施形態に係る移動通信におけ
る移動局位置推定方法を実施する移動局装置と基地局装
置の構成を示すブロック図。FIG. 7 is a block diagram showing a configuration of a mobile station device and a base station device that perform a mobile station position estimation method in mobile communication according to a second embodiment of the present invention.

【図８】図７に示す第２の実施形態において基地局と移
動局装置の間の距離を算出する原理を説明するためのタ
イミングチャート。FIG. 8 is a timing chart for explaining a principle of calculating a distance between a base station and a mobile station device in the second embodiment shown in FIG. 7;

【図９】本発明の第３の実施形態に係る移動通信におけ
る移動局位置推定方法を説明するための無線区間の送受
信信号を示す図。FIG. 9 is a diagram showing transmission / reception signals in a wireless section for explaining a mobile station position estimation method in mobile communication according to a third embodiment of the present invention.

【図１０】図９に示す第３の実施形態において基地局と
移動局の間の距離を算出する原理を説明するためのタイ
ミングチャート。FIG. 10 is a timing chart for explaining a principle of calculating a distance between a base station and a mobile station in the third embodiment shown in FIG. 9;

【符号の説明】[Explanation of symbols]

１００ 移動局装置 １０１，２０１ ＰＮ１発生部 １０２，２０２ ＰＮ２発生部 １０３，２０３ 送信信号生成部 １０４，２０４ 送信信号処理部 １０５，２０５ 送信部（同期送信部） １０６，２０６ 受信部 １０７，２０７ 位相検出部 １０８，２０９ 位相比較部 １０９ 距離算出部 １１０ 位置推定部 １１１，２１１ アンテナ ２００，３００ 基地局装置 ２０８ 基地局位置情報生成部 Reference Signs List 100 mobile station apparatus 101, 201 PN1 generating section 102, 202 PN2 generating section 103, 203 transmission signal generating section 104, 204 transmission signal processing section 105, 205 transmitting section (synchronous transmitting section) 106, 206 receiving section 107, 207 phase detection Units 108, 209 Phase comparison unit 109 Distance calculation unit 110 Position estimation unit 111, 211 Antenna 200, 300 Base station device 208 Base station position information generation unit

Claims (32)

【特許請求の範囲】[Claims] 【請求項１】 移動局と基地局の間で通信を行うセルラ
移動通信において、 （ａ）基地局と移動局の間で、該移動局に対し固有に予
め決められた第１の信号系列と第２の信号系列をやり取
りし、 （ｂ）基地局と移動局の内の一方の局において、前記第
１の信号系列と前記第２の信号系列の位相差を求め、該
位相差に基づいて基地局と移動局の間の推定距離を算出
して移動局の位置を推定することを特徴とする移動局位
置推定方法。1. A cellular mobile communication system for performing communication between a mobile station and a base station, comprising: (a) a first signal sequence that is uniquely determined for the mobile station between the base station and the mobile station; Exchanging a second signal sequence; and (b) calculating a phase difference between the first signal sequence and the second signal sequence in one of the base station and the mobile station, based on the phase difference. A mobile station position estimation method comprising calculating an estimated distance between a base station and a mobile station to estimate the position of the mobile station. 【請求項２】 前記ステップ（ａ）において、前記一方
の局は前記第１の信号系列を基地局と移動局の内の他方
の局に送信し、前記他方の局は受信した前記第１の信号
系列に同期して前記第２の信号系列を前記一方の局に送
信し、 前記ステップ（ｂ）において、前記一方の局は送信した
前記第１の信号系列と受信した前記第２の信号系列の位
相を比較して前記位相差を求めることを特徴とする請求
項１記載の移動局位置推定方法。2. In the step (a), the one station transmits the first signal sequence to another of a base station and a mobile station, and the other station receives the first signal sequence. Transmitting the second signal sequence to the one station in synchronization with a signal sequence; and in the step (b), the one station transmits the transmitted first signal sequence and the received second signal sequence. 2. The mobile station position estimating method according to claim 1, wherein the phase difference is obtained by comparing the phases. 【請求項３】 前記ステップ（ａ）においてマルチパス
の信号を受信した場合には、前記他方の局は最も遅延時
間の短いパスから受信した前記第１の信号系列に同期し
て前記第２の信号系列を送信することを特徴とする請求
項２記載の移動局位置推定方法。3. When the multi-path signal is received in the step (a), the other station synchronizes with the first signal sequence received from the path having the shortest delay time to transmit the second signal. 3. The mobile station position estimating method according to claim 2, wherein a signal sequence is transmitted. 【請求項４】 前記ステップ（ａ）においてマルチパス
の信号を受信した場合には、前記ステップ（ｂ）におい
て前記一方の局は最も遅延時間の短いパスから受信した
前記第２の信号系列を使用して前記位相差を求めること
を特徴とする請求項２記載の移動局位置推定方法。4. When the multipath signal is received in the step (a), the one station uses the second signal sequence received from the path with the shortest delay time in the step (b). 3. The mobile station position estimating method according to claim 2, wherein the phase difference is obtained. 【請求項５】 前記ステップ（ａ）において、前記一方
の局は前記第１の信号系列を基地局と移動局の内の他方
の局に送信し、前記他方の局は受信した前記第１の信号
系列と送信する前記第２の信号系列の位相を比較して第
１の位相差を求め、該第１の位相差の情報と前記第２の
信号系列を前記一方の局に送信し、 前記ステップ（ｂ）において、前記一方の局は送信した
前記第１の信号系列と受信した前記第２の信号系列の位
相を比較して第２の位相差を求め、前記第１の位相差と
該第２の位相差を用いて前記推定距離を算出することを
特徴とする請求項１記載の移動局位置推定方法。5. In the step (a), the one station transmits the first signal sequence to another of a base station and a mobile station, and the other station receives the first signal sequence. Comparing the phase of the signal sequence with the phase of the second signal sequence to be transmitted to determine a first phase difference, transmitting information on the first phase difference and the second signal sequence to the one station, In step (b), the one station compares a phase of the transmitted first signal sequence with a phase of the received second signal sequence to determine a second phase difference, and determines the first phase difference and the second phase difference. The mobile station position estimating method according to claim 1, wherein the estimated distance is calculated using a second phase difference. 【請求項６】 前記ステップ（ａ）においてマルチパス
の信号を受信した場合には、前記他方の局は最も遅延時
間の短いパスから受信した前記第１の信号系列を使用し
て前記第１の位相差を求めることを特徴とする請求項５
記載の移動局位置推定方法。6. When the multi-path signal is received in the step (a), the other station uses the first signal sequence received from the path with the shortest delay time to perform the first signal sequence. The phase difference is obtained.
The mobile station position estimating method described in the above. 【請求項７】 前記ステップ（ａ）においてマルチパス
の信号を受信した場合には、前記ステップ（ｂ）におい
て前記一方の局は最も遅延時間の短いパスから受信した
前記第２の信号系列を使用して前記第２の位相差を求め
ることを特徴とする請求項５記載の移動局位置推定方
法。7. When the multipath signal is received in step (a), the one station uses the second signal sequence received from the path with the shortest delay time in step (b). The mobile station position estimation method according to claim 5, wherein the second phase difference is calculated. 【請求項８】 前記セルラ移動通信はＣＤＭＡ方式の移
動通信であって、前記第１の信号系列と前記第２の信号
系列はＣＤＭＡ方式の拡散符号であることを特徴とする
請求項１記載の移動局位置推定方法。8. The mobile communication according to claim 1, wherein the cellular mobile communication is a CDMA mobile communication, and the first signal sequence and the second signal sequence are CDMA spreading codes. Mobile station position estimation method. 【請求項９】 前記セルラ移動通信は各基地局が全移動
局に対して報知する情報を送信する報知チャネルを有す
るものであり、前記一方の局は基地局であって、前記ス
テップ（ａ）において基地局は前記第１の信号系列を該
報知チャネルで送信することを特徴とする請求項１記載
の移動局位置推定方法。9. The cellular mobile communication according to claim 1, wherein each of the base stations has a broadcast channel for transmitting information broadcast to all the mobile stations, wherein the one station is a base station and the step (a) is performed. The method according to claim 1, wherein the base station transmits the first signal sequence on the broadcast channel. 【請求項１０】 前記ステップ（ａ）において、移動局
は複数の基地局の各々と前記第１の信号系列と前記第２
の信号系列のやり取りを行い、前記ステップ（ｂ）は該
複数の基地局に対する移動局の推定距離を各々算出し、
得られた該複数の基地局に対する移動局の推定距離を総
合して移動局の位置を推定することを特徴とする請求項
１記載の移動局位置推定方法。10. In the step (a), the mobile station transmits each of the plurality of base stations, the first signal sequence, and the second
And the step (b) calculates respective estimated distances of the mobile station to the plurality of base stations,
The mobile station position estimating method according to claim 1, wherein the position of the mobile station is estimated by integrating the obtained estimated distances of the mobile station to the plurality of base stations. 【請求項１１】 前記ステップ（ａ）において、移動局
は前記複数の基地局に対して送信する信号を符号多重し
て同時にマルチコード送信することを特徴とする請求項
１０記載の移動局位置推定方法。11. The mobile station position estimation according to claim 10, wherein, in the step (a), the mobile station code-multiplexes signals to be transmitted to the plurality of base stations and simultaneously transmits the multi-code. Method. 【請求項１２】 前記ステップ（ａ）において、移動局
は前記複数の基地局に対して送信する信号をフレーム構
成のチャネルに時分割多重して送信することを特徴とす
る請求項１０記載の移動局位置推定方法。12. The mobile station according to claim 10, wherein, in the step (a), the mobile station time-division multiplexes a signal to be transmitted to the plurality of base stations onto a frame-structured channel and transmits the signal. Station location estimation method. 【請求項１３】 前記一方の局は移動局であり、前記ス
テップ（ａ）において、基地局は移動局が前記第１の信
号系列を基地局に送信する前に、移動局に対して固有に
予め決められた第３の信号系列を報知チャネルで送信
し、移動局は受信した前記第３の信号系列に同期して前
記第１の信号系列を基地局に送信することを特徴とする
請求項１記載の移動局位置推定方法。13. The one station is a mobile station, and in the step (a), the base station transmits a first signal sequence to the base station before the mobile station transmits the first signal sequence to the base station. The mobile station transmits the first signal sequence to a base station in synchronization with the received third signal sequence by transmitting a predetermined third signal sequence on a broadcast channel. 2. The mobile station position estimation method according to 1. 【請求項１４】 前記一方の局は移動局であり、前記ス
テップ（ａ）において、基地局は移動局が前記第１の信
号系列を基地局に送信する前に、移動局に対して固有に
予め決められた第３の信号系列を報知チャネルで送信
し、移動局は受信した前記第３の信号系列と送信する前
記第１の信号系列の位相を比較して第１の位相差を求
め、該第１の位相差の情報と前記第２の信号系列を基地
局に送信し、基地局は受信した前記第１の信号系列と送
信した前記第３の信号系列の位相を比較して第２の位相
差を求め、前記第１の位相差と該第２の位相差から基地
局と移動局の第１の推定距離を算出し、受信した前記第
１の信号系列と送信する前記第２の信号系列の位相を比
較して第３の位相差を求め、該第３の位相差の情報と前
記第１の推定距離の情報と前記第２の信号系列を移動局
に送信し、 前記ステップ（ｂ）において、移動局は送信した前記第
１の信号系列と受信した前記第２の信号系列の位相を比
較して第４の位相差を求め、前記第３の位相差と前記第
４の位相差から基地局と移動局の第２の推定距離を算出
し、前記第１の推定距離と該第２の推定距離から前記推
定距離を算出することを特徴とする請求項１記載の移動
局位置推定方法。14. The one station is a mobile station, and in the step (a), the base station transmits a first signal sequence to the base station before the mobile station transmits the first signal sequence to the base station. A predetermined third signal sequence is transmitted on a broadcast channel, and the mobile station compares the phase of the received third signal sequence with the phase of the first signal sequence to be transmitted to determine a first phase difference, The first phase difference information and the second signal sequence are transmitted to a base station, and the base station compares a phase of the received first signal sequence with a phase of the transmitted third signal sequence to obtain a second signal sequence. , A first estimated distance between the base station and the mobile station is calculated from the first phase difference and the second phase difference, and the received first signal sequence and the second signal to be transmitted are calculated. A third phase difference is obtained by comparing the phases of the signal sequences, and information on the third phase difference and information on the first estimated distance are obtained. And the second signal sequence are transmitted to the mobile station. In the step (b), the mobile station compares the phase of the transmitted first signal sequence with the phase of the received second signal sequence to obtain a fourth signal sequence. Calculating a phase difference, calculating a second estimated distance between the base station and the mobile station from the third phase difference and the fourth phase difference, and calculating the estimated distance from the first estimated distance and the second estimated distance; The method according to claim 1, wherein the distance is calculated. 【請求項１５】 前記ステップ（ｂ）は、基地局のサー
ビスエリア内で基地局から前記推定距離離れた位置に対
し所定の誤差を考慮して得られる推定位置エリア内を移
動局の位置と推定し、前記ステップ（ａ）において移動
局が複数の基地局の各々と前記第１の信号系列と前記第
２の信号系列のやり取りを行う場合には、前記ステップ
（ｂ）は、該複数の基地局に対する移動局の推定距離を
各々算出し、得られた該複数の基地局に対する移動局の
推定距離から得られる複数の推定位置エリアが重複する
エリア内を移動局の位置と推定することを特徴とする請
求項１記載の移動局位置推定方法。15. The step (b) includes estimating a position of the mobile station within an estimated position area obtained by considering a predetermined error with respect to a position distant from the base station by the estimated distance in a service area of the base station. When the mobile station exchanges the first signal sequence and the second signal sequence with each of a plurality of base stations in the step (a), the step (b) includes the step of: Calculating an estimated distance of the mobile station to the base station, and estimating the position of the mobile station in an area where a plurality of estimated position areas obtained from the obtained estimated distances of the mobile station to the plurality of base stations overlap. The mobile station position estimating method according to claim 1, wherein 【請求項１６】 前記ステップ（ｂ）は、基地局の移動
局と通信中のセクタ内で基地局から前記推定距離離れた
位置に対し所定の誤差を考慮して得られる推定位置エリ
ア内を移動局の位置と推定し、前記ステップ（ａ）にお
いて移動局が複数の基地局の各々と前記第１の信号系列
と前記第２の信号系列のやり取りを行う場合には、前記
ステップ（ｂ）は、該複数の基地局に対する移動局の推
定距離を各々算出し、得られた該複数の基地局に対する
移動局の推定距離から得られる複数の推定位置エリアが
重複するエリア内を移動局の位置と推定することを特徴
とする請求項１記載の移動局位置推定方法。16. The step (b) comprises: moving in an estimated position area obtained in consideration of a predetermined error with respect to a position at the estimated distance from the base station in a sector in communication with the mobile station of the base station. If the mobile station exchanges the first signal sequence and the second signal sequence with each of a plurality of base stations in the step (a) by estimating the position of the station, the step (b) Calculating the estimated distance of the mobile station relative to the plurality of base stations, and determining the position of the mobile station within an area where a plurality of estimated position areas obtained from the obtained estimated distances of the mobile station to the plurality of base stations overlap. The mobile station position estimation method according to claim 1, wherein the estimation is performed. 【請求項１７】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの基地局における基地局装置であっ
て、 移動局が送信する、移動局に対し固有に予め決められた
第１の信号系列を受信する受信手段と、 移動局に対して固有に予め決められた第２の信号系列
を、前記受信手段で受信した前記第１の信号系列に同期
して移動局に送信して、移動局が前記第１の信号系列と
前記第２の信号系列の位相差に基づいて基地局と移動局
の間の推定距離を算出して移動局の位置を推定できるよ
うにする送信手段と、 を有することを特徴とする基地局装置。17. A base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, the base station apparatus transmitting a first predetermined transmission unique to the mobile station, transmitted by the mobile station. Receiving means for receiving a signal sequence, transmitting a second signal sequence uniquely predetermined for the mobile station to the mobile station in synchronization with the first signal sequence received by the receiving means, Transmitting means for allowing the mobile station to calculate the estimated distance between the base station and the mobile station based on the phase difference between the first signal sequence and the second signal sequence and to estimate the position of the mobile station; A base station device comprising: 【請求項１８】 前記受信手段がマルチパスの信号を受
信した場合には、前記送信手段は最も遅延時間の短いパ
スから受信した前記第１の信号系列に同期して前記第２
の信号系列を送信することを特徴とする請求項１７記載
の基地局装置。18. When the receiving means receives a multipath signal, the transmitting means synchronizes with the first signal sequence received from a path having the shortest delay time to transmit the second signal.
18. The base station apparatus according to claim 17, wherein the base station apparatus transmits the signal sequence of: 【請求項１９】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの移動局における移動局装置であっ
て、 基地局が送信する、移動局に対し固有に予め決められた
第１の信号系列を受信する受信手段と、 移動局に対して固有に予め決められた第２の信号系列
を、前記受信手段で受信した前記第１の信号系列に同期
して基地局に送信して、基地局が前記第１の信号系列と
前記第２の信号系列の位相差に基づいて基地局と移動局
の間の推定距離を算出して移動局の位置を推定できるよ
うにする送信手段と、 を有することを特徴とする移動局装置。19. A mobile station device in a mobile station of a cellular mobile communication system for performing communication between the mobile station and a base station, wherein the mobile station device transmits a first predetermined transmission unique to the mobile station and transmitted by the base station. Receiving means for receiving the signal sequence, transmitting a second signal sequence uniquely predetermined for the mobile station to the base station in synchronization with the first signal sequence received by the receiving means, Transmitting means for allowing the base station to calculate the estimated distance between the base station and the mobile station based on the phase difference between the first signal sequence and the second signal sequence and to estimate the position of the mobile station; A mobile station device comprising: 【請求項２０】 前記受信手段がマルチパスの信号を受
信した場合には、前記送信手段は最も遅延時間の短いパ
スから受信した前記第１の信号系列に同期して前記第２
の信号系列を送信することを特徴とする請求項１９記載
の移動局装置。20. When the receiving unit receives a multipath signal, the transmitting unit synchronizes with the first signal sequence received from a path having the shortest delay time to transmit the second signal.
20. The mobile station apparatus according to claim 19, wherein the mobile station apparatus transmits the following signal sequence. 【請求項２１】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの基地局における基地局装置であっ
て、 移動局に対し固有に予め決められた第１の信号系列を移
動局に送信する送信手段と、 移動局が送信する、移動局に対して固有に予め決められ
た第２の信号系列を受信する受信手段と、 前記送信手段で送信した前記第１の信号系列と前記受信
手段で受信した前記第２の信号系列の位相を比較して位
相差を求め、該位相差に基づいて基地局と移動局の間の
推定距離を算出して移動局の位置を推定する位置推定手
段と、 を有することを特徴とする基地局装置。21. A base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence uniquely predetermined for the mobile station is transmitted to the mobile station. Transmitting means for transmitting; receiving means for receiving a second signal sequence uniquely transmitted to the mobile station, which is transmitted by the mobile station; and receiving the first signal sequence transmitted by the transmitting means and the reception Means for comparing a phase of the second signal sequence received by the means to determine a phase difference, calculating an estimated distance between the base station and the mobile station based on the phase difference, and estimating a position of the mobile station. Means, and a base station apparatus comprising: 【請求項２２】 前記受信手段がマルチパスの信号を受
信した場合には、前記位置推定手段は最も遅延時間の短
いパスから受信した前記第２の信号系列を使用して前記
位相差を求めることを特徴とする請求項２１記載の基地
局装置。22. When the receiving means receives a multipath signal, the position estimating means obtains the phase difference using the second signal sequence received from the path having the shortest delay time. The base station apparatus according to claim 21, wherein: 【請求項２３】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの移動局における移動局装置であっ
て、 移動局に対し固有に予め決められた第１の信号系列を基
地局に送信する送信手段と、 基地局が送信する、移動局に対して固有に予め決められ
た第２の信号系列を受信する受信手段と、 前記送信手段で送信した前記第１の信号系列と前記受信
手段で受信した前記第２の信号系列の位相を比較して位
相差を求め、該位相差に基づいて基地局と移動局の間の
推定距離を算出して移動局の位置を推定する位置推定手
段と、 を有することを特徴とする移動局装置。23. A mobile station device in a mobile station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence uniquely predetermined for the mobile station is transmitted to the base station. Transmitting means for transmitting; receiving means for receiving a second signal sequence uniquely transmitted to the mobile station, which is transmitted by the base station; and the first signal sequence transmitted by the transmitting means and the reception Means for comparing a phase of the second signal sequence received by the means to determine a phase difference, calculating an estimated distance between the base station and the mobile station based on the phase difference, and estimating a position of the mobile station. A mobile station device comprising: 【請求項２４】 前記受信手段がマルチパスの信号を受
信した場合には、前記位置推定手段は最も遅延時間の短
いパスから受信した前記第２の信号系列を使用して前記
位相差を求めることを特徴とする請求項２３記載の移動
局装置。24. When the receiving means receives a multipath signal, the position estimating means obtains the phase difference using the second signal sequence received from a path having the shortest delay time. The mobile station device according to claim 23, wherein: 【請求項２５】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの基地局における基地局装置であっ
て、 移動局に対し固有に予め決められた第１の信号系列を移
動局に送信する送信手段と、 移動局が送信する、移動局に対して固有に予め決められ
た第２の信号系列と、移動局において求められた前記第
１の信号系列と第２の信号系列の位相差を示す第１の位
相差の情報を受信する受信手段と、 前記送信手段で送信した前記第１の信号系列と前記受信
手段で受信した前記第２の信号系列の位相を比較して第
２の位相差を求め、前記受信手段で受信した前記第１の
位相差と該第２の位相差に基づいて基地局と移動局の間
の推定距離を算出して移動局の位置を推定する位置推定
手段と、 を有することを特徴とする基地局装置。25. A base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence uniquely predetermined for the mobile station is transmitted to the mobile station. Transmitting means for transmitting; a second signal sequence transmitted by the mobile station, which is uniquely determined for the mobile station; and positions of the first signal sequence and the second signal sequence determined by the mobile station. Receiving means for receiving information of a first phase difference indicating a phase difference; and comparing a phase of the first signal sequence transmitted by the transmitting means with a phase of the second signal sequence received by the receiving means, to obtain a second signal. And a position for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference received by the receiving means. A base station apparatus comprising: estimating means; 【請求項２６】 前記受信手段がマルチパスの信号を受
信した場合には、前記位置推定手段は最も遅延時間の短
いパスから受信した前記第２の信号系列を使用して前記
第２の位相差を求めることを特徴とする請求項２５記載
の基地局装置。26. When the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to obtain the second phase difference. 26. The base station apparatus according to claim 25, wherein: 【請求項２７】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの移動局における移動局装置であっ
て、 移動局に対し固有に予め決められた第１の信号系列を基
地局に送信する送信手段と、 基地局が送信する、移動局に対して固有に予め決められ
た第２の信号系列と、基地局において求められた前記第
１の信号系列と第２の信号系列の位相差を示す第１の位
相差の情報を受信する受信手段と、 前記送信手段で送信した前記第１の信号系列と前記受信
手段で受信した前記第２の信号系列の位相を比較して第
２の位相差を求め、前記受信手段で受信した前記第１の
位相差と該第２の位相差に基づいて基地局と移動局の間
の推定距離を算出して移動局の位置を推定する位置推定
手段と、 を有することを特徴とする移動局装置。27. A mobile station device in a mobile station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence uniquely predetermined for the mobile station is transmitted to the base station. Transmitting means for transmitting; a second signal sequence uniquely transmitted to the mobile station, transmitted by the base station; and positions of the first signal sequence and the second signal sequence obtained at the base station. Receiving means for receiving information of a first phase difference indicating a phase difference; and comparing a phase of the first signal sequence transmitted by the transmitting means with a phase of the second signal sequence received by the receiving means, to obtain a second signal. And a position for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference received by the receiving means. A mobile station device comprising: estimating means. 【請求項２８】 前記受信手段がマルチパスの信号を受
信した場合には、前記位置推定手段は最も遅延時間の短
いパスから受信した前記第２の信号系列を使用して前記
第２の位相差を求めることを特徴とする請求項２７記載
の移動局装置。28. When the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path with the shortest delay time to obtain the second phase difference. 28. The mobile station apparatus according to claim 27, wherein: 【請求項２９】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの基地局における基地局装置であっ
て、 移動局が送信する、移動局に対し固有に予め決められた
第１の信号系列を受信する受信手段と、 前記受信手段で受信した前記第１の信号系列と移動局に
対して固有に予め決められた第２の信号系列の位相を比
較して第１の位相差を求め、前記第２の信号系列と該第
１の位相差の情報を移動局に送信して、移動局が前記第
１の信号系列と前記第２の信号系列の位相を比較して第
２の位相差を求め、前記第１の位相差と該第２の位相差
に基づいて基地局と移動局の間の推定距離を算出して移
動局の位置を推定できるようにする送信手段と、 を有することを特徴とする基地局装置。29. A base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, the base station apparatus transmitting a first predetermined transmission unique to the mobile station, transmitted by the mobile station. Receiving means for receiving a signal sequence; comparing the phase of the first signal sequence received by the receiving means with the phase of a second signal sequence uniquely predetermined for a mobile station to determine a first phase difference And transmitting the information of the second signal sequence and the first phase difference to the mobile station, and the mobile station compares the phases of the first signal sequence and the second signal sequence to obtain a second signal sequence. Transmitting means for obtaining a phase difference, calculating an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference, and estimating the position of the mobile station; A base station device comprising: 【請求項３０】 前記受信手段がマルチパスの信号を受
信した場合には、前記送信手段は最も遅延時間の短いパ
スから受信した前記第１の信号系列を使用して前記第１
の位相差を求めることを特徴とする請求項２９記載の基
地局装置。30. When the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to transmit the first signal.
30. The base station apparatus according to claim 29, wherein a phase difference of the base station is obtained. 【請求項３１】 移動局と基地局の間で通信を行うセル
ラ移動通信システムの移動局における移動局装置であっ
て、 基地局か送信する、移動局に対し固有に予め決められた
第１の信号系列を受信する受信手段と、 前記受信手段で受信した前記第１の信号系列と移動局に
対して固有に予め決められた第２の信号系列の位相を比
較して第１の位相差を求め、前記第２の信号系列と該第
１の位相差の情報を基地局に送信して、基地局が前記第
１の信号系列と前記第２の信号系列の位相を比較して第
２の位相差を求め、前記第１の位相差と該第２の位相差
に基づいて基地局と移動局の間の推定距離を算出して移
動局の位置を推定できるようにする送信手段と、 を有することを特徴とする移動局装置。31. A mobile station device in a mobile station of a cellular mobile communication system for performing communication between the mobile station and a base station, wherein the first mobile station transmits from the base station and is uniquely determined to the mobile station. Receiving means for receiving a signal sequence; comparing the phase of the first signal sequence received by the receiving means with the phase of a second signal sequence uniquely predetermined for a mobile station to determine a first phase difference And transmitting the information of the second signal sequence and the first phase difference to a base station, and the base station compares the phases of the first signal sequence and the second signal sequence to obtain a second signal sequence. Transmitting means for obtaining a phase difference, calculating an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference, and estimating the position of the mobile station; A mobile station device comprising: 【請求項３２】 前記受信手段がマルチパスの信号を受
信した場合には、前記送信手段は最も遅延時間の短いパ
スから受信した前記第１の信号系列を使用して前記第１
の位相差を求めることを特徴とする請求項３１記載の移
動局装置。32. When the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path with the shortest delay time to transmit the first signal.
32. The mobile station apparatus according to claim 31, wherein a phase difference of the mobile station apparatus is obtained.
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