JPH10247955A - Digital mobile radio communication method - Google Patents
Digital mobile radio communication methodInfo
- Publication number
- JPH10247955A JPH10247955A JP9065360A JP6536097A JPH10247955A JP H10247955 A JPH10247955 A JP H10247955A JP 9065360 A JP9065360 A JP 9065360A JP 6536097 A JP6536097 A JP 6536097A JP H10247955 A JPH10247955 A JP H10247955A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- modulation
- temporary storage
- data
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はディジタルデータを
高速、高品質に伝送するためのディジタル移動無線通信
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital mobile radio communication method for transmitting digital data at high speed and high quality.
【０００２】[0002]
【従来の技術】従来、ディジタルデータを高速、高品質
に伝送するための技術として本願出願人はすでに特開平
７−２５０１１６号を出願している。2. Description of the Related Art Heretofore, the present applicant has already applied for Japanese Patent Application Laid-Open No. 7-250116 as a technique for transmitting digital data at high speed and with high quality.
【０００３】ここで開示された技術内容は、適応変調方
式に一時記憶部を付加して、一定のデータ伝送速度を得
る方法であり、伝送路を推定し、その変動に応じて最適
な送信の帯域幅、変調方式を決定し、送信する適応変調
方式において、推定した伝送路の情報及び送信用データ
が蓄積されている送信側一時記憶部の記憶容量の使用状
況の情報に基づいて送信帯域幅、変調方式を決定し、送
信側一時記憶部のデータを決定された帯域幅、変調方式
に基づき送信し、受信側では、受信側一時記憶部で受信
データを蓄積し、一定速度で出力するデータ伝送方法で
ある。[0003] The technical content disclosed here is a method of obtaining a constant data transmission rate by adding a temporary storage unit to an adaptive modulation method, estimating a transmission path, and performing optimal transmission according to the fluctuation. In the adaptive modulation scheme for determining and transmitting the bandwidth and the modulation scheme, the transmission bandwidth is determined based on the information of the estimated transmission path information and the information on the usage status of the storage capacity of the transmission-side temporary storage unit in which the transmission data is stored. Determine the modulation method, transmit the data in the temporary storage unit on the transmission side based on the determined bandwidth and modulation method, and on the reception side, store the received data in the temporary storage unit on the reception side and output the data at a constant speed. The transmission method.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、移動通
信では特有の周波数選択性フェージング環境では、符号
間干渉のため伝送特性が劣化する。また、伝送速度を高
めるためにシンボル速度を上げた場合、図５（ａ）のよ
うにキャリアの占有周波数帯域が広くなるため、周波数
選択性フェージング環境に対する耐性が低下し、伝送特
性が劣化するという問題を有していた。However, in a frequency selective fading environment peculiar to mobile communication, transmission characteristics deteriorate due to intersymbol interference. Also, when the symbol rate is increased to increase the transmission rate, the occupied frequency band of the carrier is widened as shown in FIG. 5A, so that the resistance to the frequency selective fading environment is reduced and the transmission characteristics are deteriorated. Had a problem.
【０００５】本発明は、適応変調方式を用いながらも、
ディジタルデータを高速、高品質に伝送することを目的
としている。[0005] The present invention uses an adaptive modulation scheme,
It aims to transmit digital data at high speed and high quality.
【０００６】[0006]
【課題を解決するための手段】本発明は上記に鑑みて提
案されたものであり、周波数選択性フェージング環境に
おいて、図５（ｂ）に示すような複数のサブキャリアか
らなるマルチキャリア伝送方式を導入し、上記各サブキ
ャリアに対応する複数の適応変調ブロックを設けると共
に、該複数の適応変調ブロックと信号の送受信をおこな
う１つの送信側一時記憶部と受信側一時記憶部並びに上
記複数の適応変調ブロックに対応する伝送路推定部を備
え、該伝送路推定部において伝送路状況の良いサブキャ
リアでは多くの情報を伝送し、伝送路状況の悪いサブキ
ャリアでは少なく情報を伝送するように構成したディジ
タル移動無線通信方法を提供するものである。SUMMARY OF THE INVENTION The present invention has been proposed in view of the above. In a frequency selective fading environment, a multicarrier transmission system including a plurality of subcarriers as shown in FIG. And a plurality of adaptive modulation blocks corresponding to each of the subcarriers, and a transmission-side temporary storage unit and a reception-side temporary storage unit for transmitting and receiving signals to and from the plurality of adaptive modulation blocks, and the plurality of adaptive modulation units. A digital channel comprising a transmission path estimator corresponding to a block, wherein the transmission path estimator transmits a large amount of information on subcarriers having good transmission path conditions and transmits a small amount of information on subcarriers having poor transmission path conditions. A mobile wireless communication method is provided.
【０００７】また、本発明は、送信すべきデータが上記
送信側一時記憶部に存在しない場合（良好な伝送路状況
が続いた場合）、伝送路推定部において変調度の大きい
変調方式が選択された信号に対して中程度の変調度の変
調方式を強制的に割り当てると共に、送信すべきデータ
が上記送信側一時記憶部を満杯にした場合（悪い伝送路
状況が続いた場合）、伝送路推定部にて変調度の小さい
変調方式か若しくはダミーデータが選択された信号に対
して、上記中程度の変調度の変調方式を強制的に割り当
てるディジタル移動無線通信方法を提供するものであ
る。Further, according to the present invention, when data to be transmitted does not exist in the transmission-side temporary storage section (when good transmission path conditions continue), the transmission path estimating section selects a modulation scheme having a large modulation factor. When a modulation scheme of a medium degree of modulation is forcibly assigned to the transmitted signal and the data to be transmitted fills the temporary storage unit on the transmission side (in the case of a bad transmission path condition), the transmission path estimation is performed. It is an object of the present invention to provide a digital mobile radio communication method for forcibly assigning the modulation scheme having the medium modulation degree to a signal for which a modulation method having a small modulation degree or dummy data is selected in a section.
【０００８】すなわち、上記した手順によれば、データ
伝送速度は、一時記憶部による時間遅延はあるものの、
常に上記中程度の変調度の変調方式が選択された場合と
等しくなる。That is, according to the above-described procedure, the data transmission speed is not limited, although there is a time delay due to the temporary storage unit.
This is always equal to the case where the modulation method of the medium modulation degree is selected.
【０００９】[0009]
【発明の実施の形態】以下に、本発明の具体的な構成を
図面に従い説明する。先ず、マルチキャリア伝送方式に
ついて説明する。マルチキャリア伝送方式は、周波数選
択性フェージング対策及び高速伝送技術の１つであり、
各サブチャネルの伝送速度を周波数選択性フェージング
の影響を受けない程度に抑え、データを複数のサブキャ
リアを用いて並列に伝送することにより、全体として高
速伝送を行うマルチキャリア伝送方式である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific structure of the present invention will be described below with reference to the drawings. First, the multicarrier transmission scheme will be described. Multi-carrier transmission is one of frequency selective fading countermeasures and high-speed transmission technology.
This is a multi-carrier transmission system that performs high-speed transmission as a whole by suppressing the transmission speed of each sub-channel to a level that is not affected by frequency-selective fading, and transmitting data in parallel using a plurality of sub-carriers.
【００１０】データ伝送方法にマルチキャリア伝送方式
を導入することにより、高速かつ高品質な伝送特性が得
られる。特にデータ伝送方法において、一時記憶部をた
だ１つとしたことにより、伝送路状況の異なる各サブキ
ャリアに対してより繊細な適応制御が行え、その結果、
伝送する信号のビット誤り率が改善でき、このため、こ
れまで以上に高品質な伝送特性が得られる。[0010] By introducing the multi-carrier transmission method to the data transmission method, high-speed and high-quality transmission characteristics can be obtained. In particular, in the data transmission method, by using only one temporary storage unit, more delicate adaptive control can be performed for each subcarrier having a different transmission path condition.
The bit error rate of the signal to be transmitted can be improved, so that higher quality transmission characteristics can be obtained.
【００１１】また、後述するように、マルチキャリア伝
送方式において（技術の単なる組み合わせとして考えれ
ばサブキャリア数分の一時記憶部を用意するところ
を）、一時記憶部をただ１つとして、各サブキャリアに
対する帯域幅、変調方式を集中的に制御するものであ
る。Further, as will be described later, in the multi-carrier transmission system (where a temporary storage unit corresponding to the number of subcarriers is prepared as a mere combination of technologies), only one temporary storage unit is used and each subcarrier is used. , And the bandwidth and the modulation method are centrally controlled.
【００１２】次に、本発明の原理を図１で説明する。Next, the principle of the present invention will be described with reference to FIG.
【００１３】本発明ではマルチキャリア伝送方式を採用
し、各サブキャリアの伝送路状況を複数（本実施形態で
は４つ）の段階に分け、それぞれの状況で最良の変調方
式の伝送をおこなうようにする。すなわち、閾値３以上
の場合は、６４ＱＡＭで信号の伝送をおこない、閾値２
以上の場合は１６ＱＡＭで信号の伝送をおこない、閾値
１以上の場合はＱＰＳＫで信号の伝送をおこない、閾値
１未満の場合にはダミー（ＤＵＭＭＹ）として信号の伝
送をおこなわないようにする。In the present invention, a multi-carrier transmission system is adopted, the transmission path status of each subcarrier is divided into a plurality of stages (four in this embodiment), and the transmission of the best modulation system is performed in each situation. I do. That is, if the threshold value is 3 or more, the signal is transmitted using 64QAM,
In the above case, the signal is transmitted by 16QAM, when the threshold is 1 or more, the signal is transmitted by QPSK, and when the value is less than the threshold 1, the signal is not transmitted as a dummy (DUMMY).
【００１４】その結果、伝送路状況の良いサブキャリア
では多くの情報を伝送し、伝送路状況の悪いサブキャリ
アでは少なく情報を伝送するように構成したので、高品
質の信号を高速に伝送できた。As a result, since a large amount of information is transmitted on subcarriers having good transmission path conditions and a small amount of information is transmitted on subcarriers having poor transmission path conditions, high quality signals can be transmitted at high speed. .
【００１５】図２は本発明の一実施形態を示すブロック
図であり、各構成を以下に説明する。FIG. 2 is a block diagram showing one embodiment of the present invention, and each configuration will be described below.
【００１６】２は送信側一時記憶部であり、通常、適応
変調では送信する変調方式に依存してデータ伝送速度が
変化する。これは一定の伝送速度を要求するデータ伝送
サービスに対して不都合である。送信側一時記憶部２は
受信側一時記憶部１０と共に用いて、一定の伝送速度を
得るために利用するバッファメモリの機能をする。Reference numeral 2 denotes a temporary storage unit on the transmission side. Normally, in adaptive modulation, the data transmission rate changes depending on the modulation scheme to be transmitted. This is inconvenient for data transmission services that require a constant transmission rate. The transmission-side temporary storage unit 2 functions together with the reception-side temporary storage unit 10 as a buffer memory used to obtain a fixed transmission rate.
【００１７】３は直並列変換部であり、１つのデータの
まとまりを、複数の適応変調ブロック１ａ〜１ｃに対応
した複数のデータのまとまりに分割する。Reference numeral 3 denotes a serial-to-parallel converter, which divides one data unit into a plurality of data units corresponding to a plurality of adaptive modulation blocks 1a to 1c.
【００１８】変調部１６は後述する送信変調方式決定部
４からの信号（DUMMY，QPSK，16QAM，64QAMのいずれか
を示す）により変調をおこなう。The modulator 16 modulates with a signal (indicating one of DUMMY, QPSK, 16QAM, and 64QAM) from a transmission modulation scheme determiner 4 described later.
【００１９】合成部５は複数の適応変調ブロック１ａ〜
１ｃに対応したサブキャリア数分の信号を合成する。
尚、サブキャリア間の干渉を避けるため、各サブキャリ
アは変調部１６において、互いに異なる高周波信号で変
調されているものとする。The synthesizing section 5 includes a plurality of adaptive modulation blocks 1a to 1a.
The signals for the number of subcarriers corresponding to 1c are synthesized.
In order to avoid interference between subcarriers, it is assumed that each subcarrier is modulated by the modulation unit 16 with a different high-frequency signal.
【００２０】アンテナ共用器６は１本のアンテナ７で送
信、受信を共用できるように機能する。また、分配部８
は受信信号を適応変調ブロック１ａ〜１ｃに対応した分
配する。The antenna duplexer 6 functions so that one antenna 7 can share transmission and reception. The distribution unit 8
Distributes received signals corresponding to adaptive modulation blocks 1a to 1c.
【００２１】準同期検波部１１は高周波信号を扱いの容
易な低周波信号に変換する。The quasi-synchronous detector 11 converts a high-frequency signal into a low-frequency signal that is easy to handle.
【００２２】フェージング歪推定・補償部１２は送信信
号中に挿入された既知の信号Ｐにより歪んだ信号を補償
する。The fading distortion estimator / compensator 12 compensates for a signal distorted by the known signal P inserted into the transmission signal.
【００２３】伝送路推定部１３は受信信号及びフェージ
ング歪推定・補償部１２からの受信信号の状況を示す信
号より、伝送路の状況（例えば受信信号対雑音電力比）
を求め、次の送信タイミングにおける最適な変調方式を
（受信から送信までに時間差があるため、受信信号の状
況がその間に変わることを考慮して、受信信号の最初及
び最後における状況から、伝送路状況を示すパラメータ
を外挿して）、選択出力する。The transmission path estimating unit 13 obtains the state of the transmission path (for example, the received signal to noise power ratio) from the received signal and the signal indicating the state of the received signal from the fading distortion estimation / compensation unit 12.
And determine the optimal modulation scheme at the next transmission timing (from the situation at the beginning and end of the received signal, taking into account that the situation of the received signal changes during that time because there is a time difference from reception to transmission, Extrapolate parameters indicating the situation) and select and output.
【００２４】変調方式推定部１４は送信信号中に挿入さ
れた送信変調方式情報シンボル（Ｉ）から、送信変調方
式が何であるかを推定する。The modulation scheme estimating section 14 estimates what the transmission modulation scheme is from the transmission modulation scheme information symbol (I) inserted in the transmission signal.
【００２５】復調部１５は変調方式推定部１４からの信
号により、対応する変調方式で復調する。The demodulation section 15 demodulates the signal from the modulation scheme estimating section 14 in a corresponding modulation scheme.
【００２６】並直列変換部９は適応変調ブロック１ａ〜
１ｃに対応した複数のデータのまとまりを、１つのデー
タにまとめる。The parallel-to-serial conversion unit 9 includes adaptive modulation blocks 1a to 1a.
A group of a plurality of data corresponding to 1c is collected into one data.
【００２７】受信側一時記憶部１０は送信側一時記憶部
２と共に用いて、一定の伝送速度を得るために利用する
ためのバッファメモリからなる。The temporary storage unit 10 on the receiving side is used together with the temporary storage unit 2 on the transmitting side, and comprises a buffer memory used for obtaining a constant transmission speed.
【００２８】送信変調方式決定部４は適応変調ブロック
１ａ〜１ｃに対応した各伝送路推定部１３からの情報に
基づき、各サブキャリアにおける変調方式を決定する。The transmission modulation scheme determination section 4 determines a modulation scheme for each subcarrier based on information from each transmission path estimation section 13 corresponding to the adaptive modulation blocks 1a to 1c.
【００２９】図３において本発明に用いられる伝送信号
について説明する。本実施形態においては、送信及び受
信の各フレームが交互に繋がって伝送信号を構成してお
り、ＲＵはランプアップシンボル（立ち上がり用シンボ
ル）であり、ＲＤはランプダウンシンボル（立ち下がり
用シンボル）であり、Ｐはパイロットシンボルであり、
Ｉは送信変調方式情報シンボルであり、ＤＡＴＡはデー
タシンボルである。Referring to FIG. 3, a transmission signal used in the present invention will be described. In this embodiment, transmission and reception frames are connected alternately to form a transmission signal, RU is a ramp-up symbol (rising symbol), and RD is a ramp-down symbol (falling symbol). And P is a pilot symbol,
I is a transmission modulation scheme information symbol, and DATA is a data symbol.
【００３０】次に本発明の一実施形態における動作を説
明する。送信変調方式決定部４では、受信信号の強度情
報、フェージング変動情報、送信側一時記憶部２の使用
状況をもとにして、送信変調方式（例えば直交振幅変調
の多値数：以下これを変調レベルと呼ぶ）を決定する。
この変調レベルの決定は、送信側一時記憶部の使用状況
に余裕がある場合は、受信状況が良好なときには例えば
６４ＱＡＭのように変調レベルを大きくし、受信状況が
悪いときには変調レベルを小さくして制御する。Next, the operation of the embodiment of the present invention will be described. The transmission modulation scheme deciding section 4 modulates the transmission modulation scheme (for example, the multi-level number of quadrature amplitude modulation: hereinafter) based on the received signal strength information, fading fluctuation information, and the use status of the transmission side temporary storage section 2. Level).
This modulation level is determined by increasing the modulation level, such as 64QAM, when the reception condition is good, and decreasing the modulation level when the reception condition is bad, when there is room in the use condition of the temporary storage unit on the transmission side. Control.
【００３１】また、送信側一時記憶部２の容量が満杯に
なりそうな場合（例えば小さい変調レベルによる送信が
続いた場合）には、送信変調方式決定部４により変調レ
ベルを強制的に大きくして伝送速度を保つ。逆に空にな
りそうな場合（例えば大きい変調レベルによる送信が続
いた場合）には、変調レベルを強制的に小さくして伝送
速度を保つ。具体的な手順例は以下の通りである。When the capacity of the temporary storage unit 2 on the transmission side is likely to be full (for example, when transmission at a low modulation level continues), the modulation level is forcibly increased by the transmission modulation scheme determination unit 4. To maintain the transmission speed. Conversely, when the data is likely to be empty (for example, when transmission at a high modulation level continues), the modulation level is forcibly reduced to maintain the transmission speed. A specific procedure example is as follows.
【００３２】(1) 送信すべきデータが送信側一時記憶部
２に存在しない場合（良好な伝送路状況が続いた場
合）、伝送路推定部１３において６４ＱＡＭが選択され
た信号に対して１６ＱＡＭを強制的に割り当てる。(1) When data to be transmitted does not exist in the transmission side temporary storage unit 2 (when good transmission path conditions continue), the transmission path estimating unit 13 applies 16 QAM to the signal for which 64 QAM is selected. Force assignment.
【００３３】(2) 送信すべきデータが送信側一時記憶部
２を満杯にした場合（悪い伝送路状況が続いた場合）、
伝送路推定部１３においてDUMMYあるいはＱＰＳＫが選
択された信号に対して１６ＱＡＭを強制的に割り当て
る。(2) When the data to be transmitted fills the temporary storage unit 2 on the transmission side (when the bad transmission path condition continues),
The transmission channel estimating unit 13 forcibly allocates 16 QAM to the signal for which DUMMY or QPSK is selected.
【００３４】すなわち、(1)、(2)の手順によれば、 デ
ータ伝送速度は、一時記憶部による時間遅延はあるもの
の、常に１６ＱＡＭが選択された場合と等しくなる。That is, according to the procedures (1) and (2), the data transmission rate is always equal to the case where 16QAM is selected, although there is a time delay due to the temporary storage unit.
【００３５】図４は本実施形態のシミュレーション結果
を表す特性図であり、シミュレーション評価の容易性か
ら、帯域幅を固定としたシステムを仮定している。FIG. 4 is a characteristic diagram showing a simulation result of the present embodiment. A system having a fixed bandwidth is assumed for ease of simulation evaluation.
【００３６】以上、本発明を実施形態に基づいて説明し
たが、本発明は上記した実施形態に限定されるものでは
なく、特許請求の範囲に記載した構成を変更しない限
り、どのようにでも実施できる。As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and may be implemented in any manner unless the structure described in the claims is changed. it can.
【００３７】[0037]
【発明の効果】以上に示したように本発明に係るディジ
タル移動無線通信方法にあっては、高品質伝送が可能な
データ伝送方法において、マルチキャリア伝送方法を導
入することにより、移動無線通信では一般的な周波数選
択性フェージング環境において高品質かつ高速伝送が可
能となる。As described above, in the digital mobile radio communication method according to the present invention, a multi-carrier transmission method is introduced in a data transmission method capable of high quality transmission. High quality and high speed transmission are possible in a general frequency selective fading environment.
【００３８】また、複数の適応変調ブロック及び該適応
変調ブロックに対応する送信変調方式決定部を用いるこ
とにより、伝送路状況の良いサブキャリアでは多くの情
報を送り、伝送路状況の悪いサブキャリアでは少なく情
報を送るといった、情報の配分に関する繊細な制御が可
能となったため、伝送能率の改善が図れる等、多大な効
果を奏する。Further, by using a plurality of adaptive modulation blocks and a transmission modulation scheme determining unit corresponding to the adaptive modulation blocks, a large amount of information is transmitted in subcarriers having good transmission path conditions, and is transmitted in subcarriers having poor transmission path conditions. Since delicate control regarding the distribution of information, such as sending a small amount of information, has become possible, there are significant effects such as improvement in transmission efficiency.
【図１】本発明の原理を説明する概念図である。FIG. 1 is a conceptual diagram illustrating the principle of the present invention.
【図２】本発明の一実施形態を示すブロック図である。FIG. 2 is a block diagram showing one embodiment of the present invention.
【図３】本発明における伝送信号を示す概念図である。FIG. 3 is a conceptual diagram showing a transmission signal in the present invention.
【図４】本発明のシミュレーション結果を表す特性図で
ある。FIG. 4 is a characteristic diagram showing a simulation result of the present invention.
【図５】（ａ），（ｂ）は何れも周波数選択性フェージ
ングにおける信号の帯域を示しており、（ａ）は単一キ
ャリア伝送、（ｂ）はマルチキャリア伝送の概念を示す
概念図である。5 (a) and 5 (b) each show a signal band in frequency selective fading; FIG. 5 (a) is a conceptual diagram showing a single carrier transmission, and FIG. 5 (b) is a conceptual diagram showing a multi carrier transmission concept. is there.
１ａ，１ｂ，１ｃ 適応変調ブロック ２ 送信側一時記憶部 ３ 直並列変換部 ４ 送信変調方式決定部 ５ 合成部 ６ アンテナ共用器 ７ アンテナ ８ 分配部 ９ 並直列変換部 １０ 受信側一時記憶部 １１ 準同期検波部 １２ フェージング歪推定・補償部 １３ 伝送路推定部 １４ 変調方式推定部 １５ 復調部 1a, 1b, 1c Adaptive modulation block 2 Temporary storage unit on transmission side 3 Serial-parallel conversion unit 4 Transmission modulation method determination unit 5 Synthesis unit 6 Antenna duplexer 7 Antenna 8 Distribution unit 9 Parallel-serial conversion unit 10 Reception-side temporary storage unit 11 Near Synchronous detector 12 Fading distortion estimator / compensator 13 Transmission channel estimator 14 Modulation scheme estimator 15 Demodulator
【表１】 [Table 1]
Claims (2)
て、複数のサブキャリアからなるマルチキャリア伝送方
式を導入し、上記各サブキャリアに対応する複数の適応
変調ブロックを設けると共に、該複数の適応変調ブロッ
クと信号の送受信をおこなう１つの送信側一時記憶部と
受信側一時記憶部並びに上記複数の適応変調ブロックに
対応する伝送路推定部を備え、該伝送路推定部において
伝送路状況の良いサブキャリアでは多くの情報を伝送
し、伝送路状況の悪いサブキャリアでは少なく情報を伝
送するように構成したことを特徴とするディジタル移動
無線通信方法。In a frequency selective fading environment, a multi-carrier transmission system including a plurality of subcarriers is introduced, a plurality of adaptive modulation blocks corresponding to each of the subcarriers are provided, and the plurality of adaptive modulation blocks and a signal are provided. And a transmission-side estimating unit corresponding to the plurality of adaptive modulation blocks. The transmission-path estimating unit includes a large number of subcarriers having good transmission path conditions. A digital mobile radio communication method comprising transmitting information and transmitting less information on subcarriers having poor transmission path conditions.
部に存在しない場合、上記伝送路推定部において変調度
の大きい変調方式が選択された信号に対して中程度の変
調度の変調方式を強制的に割り当てると共に、送信すべ
きデータが上記送信側一時記憶部を満杯にした場合、伝
送路推定部にて変調度の小さい変調方式か若しくはダミ
ーデータが選択された信号に対して、上記中程度の変調
度の変調方式を強制的に割り当てることを特徴とする請
求項１に記載のディジタル移動無線通信方法。2. When data to be transmitted does not exist in the transmission-side temporary storage unit, a modulation scheme with a medium modulation degree is applied to a signal for which a modulation scheme with a large modulation degree is selected in the transmission path estimation unit. When the data to be transmitted fills the transmission-side temporary storage unit while the data to be transmitted is full, the transmission path estimating unit performs the above-described processing on the signal for which the modulation scheme with a small modulation factor or the dummy data is selected. 2. The digital mobile radio communication method according to claim 1, wherein a modulation scheme having a degree of modulation is forcibly assigned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9065360A JP3066483B2 (en) | 1997-03-04 | 1997-03-04 | Digital mobile radio communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9065360A JP3066483B2 (en) | 1997-03-04 | 1997-03-04 | Digital mobile radio communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10247955A true JPH10247955A (en) | 1998-09-14 |
| JP3066483B2 JP3066483B2 (en) | 2000-07-17 |
Family
ID=13284726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9065360A Expired - Lifetime JP3066483B2 (en) | 1997-03-04 | 1997-03-04 | Digital mobile radio communication method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3066483B2 (en) |
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000049749A1 (en) * | 1999-02-19 | 2000-08-24 | Mitsubishi Denki Kabushiki Kaisha | Communication device and communication method |
| JP2000324081A (en) * | 1999-05-12 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Transmitter-receiver |
| JP2001024616A (en) * | 1999-07-02 | 2001-01-26 | Hitachi Denshi Ltd | Transmitting method and apparatus thereof |
| JP2001103114A (en) * | 1999-07-28 | 2001-04-13 | Matsushita Electric Ind Co Ltd | Transmitter, receiver and digital wireless communication method |
| JP2001103032A (en) * | 1999-07-23 | 2001-04-13 | Nippon Telegr & Teleph Corp <Ntt> | Ofdm modulation and demodulation circuit |
| WO2002009377A1 (en) * | 2000-07-26 | 2002-01-31 | Matsushita Electric Industrial Co., Ltd. | Communication terminal apparatus, base station apparatus, and communication method |
| US6389438B1 (en) | 1998-02-25 | 2002-05-14 | Yozan Inc. | Matched filter and signal reception apparatus |
| WO2002069591A1 (en) * | 2001-02-27 | 2002-09-06 | Matsushita Electric Industrial Co., Ltd. | Communication device and transmission mode selecting method |
| JP2002290417A (en) * | 2001-03-27 | 2002-10-04 | Hightech Research Kk | Radio lan system adaptable to noise environment |
| JP2002344357A (en) * | 2001-05-18 | 2002-11-29 | Matsushita Electric Ind Co Ltd | Multiband radiocommunication system |
| US6510184B1 (en) | 1998-02-27 | 2003-01-21 | Nec Corporation | Multi-carrier transmission system and method thereof |
| JP2004505498A (en) * | 2000-07-25 | 2004-02-19 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Link quality measurement of transmission link in OFDM transmission system |
| JP2004104574A (en) * | 2002-09-11 | 2004-04-02 | Mitsubishi Electric Corp | Method for controlling retransmission and communication equipment |
| JP2004228669A (en) * | 2003-01-20 | 2004-08-12 | Matsushita Electric Ind Co Ltd | Transmission apparatus and transmission method |
| JP2004531980A (en) * | 2001-06-26 | 2004-10-14 | クゥアルコム・インコーポレイテッド | Method and system for processing data for transmission in a multi-channel communication system using selective channel transmission |
| JP2004531976A (en) * | 2001-06-14 | 2004-10-14 | クゥアルコム・インコーポレイテッド | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| JP2004535105A (en) * | 2001-05-17 | 2004-11-18 | クゥアルコム・インコーポレイテッド | Transmission in a multi-channel communication system using selective channel power control |
| JP2005020076A (en) * | 2003-06-23 | 2005-01-20 | Toshiba Corp | Communication method, transmission apparatus, and reception apparatus |
| JP2005086436A (en) * | 2003-09-08 | 2005-03-31 | Sharp Corp | Radio communication device and radio communication system |
| JP2005535167A (en) * | 2002-06-20 | 2005-11-17 | クゥアルコム・インコーポレイテッド | Rate control for multi-channel communication systems. |
| JP2006508555A (en) * | 2002-03-21 | 2006-03-09 | エルジー エレクトロニクス インコーポレイティド | Signal transmission method and apparatus in mobile communication system |
| US7058132B1 (en) * | 1999-06-21 | 2006-06-06 | Nokia Mobile Phones, Ltd. | Method and arrangement for using a selected signal processing scheme to carry information |
| JP2006524930A (en) * | 2003-04-29 | 2006-11-02 | エルジー エレクトロニクス インコーポレイティド | Signal transmission method in mobile communication system |
| JP2007509576A (en) * | 2003-10-24 | 2007-04-12 | クゥアルコム・インコーポレイテッド | Speed selection for multi-carrier MIMO systems |
| JP2007266719A (en) * | 2006-03-27 | 2007-10-11 | Fujitsu Ltd | Base station equipment, terminal and band control method |
| WO2008041291A1 (en) * | 2006-09-29 | 2008-04-10 | Fujitsu Limited | Base station device |
| JP2008219924A (en) * | 2002-02-13 | 2008-09-18 | Interdigital Technol Corp | Transport block set transmission using hybrid automatic repeat request |
| JP2010154537A (en) * | 1999-03-12 | 2010-07-08 | Daphimo Co Bv Llc | Multi-carrier modulation system adapting rate without disruption and method of the same |
| US7844005B2 (en) | 2005-05-16 | 2010-11-30 | Panasonic Corporation | Multicarrier communication apparatus, integrated circuit, and multicarrier communication method |
| JP2014195316A (en) * | 2000-12-15 | 2014-10-09 | Adaptix Inc | Adaptive cluster configuration and multiple carrier communication by switching |
| JP2018140669A (en) * | 2017-02-27 | 2018-09-13 | 株式会社京三製作所 | Information transmission system, transmitter and on-board device |
-
1997
- 1997-03-04 JP JP9065360A patent/JP3066483B2/en not_active Expired - Lifetime
Cited By (75)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6389438B1 (en) | 1998-02-25 | 2002-05-14 | Yozan Inc. | Matched filter and signal reception apparatus |
| US6510184B1 (en) | 1998-02-27 | 2003-01-21 | Nec Corporation | Multi-carrier transmission system and method thereof |
| WO2000049749A1 (en) * | 1999-02-19 | 2000-08-24 | Mitsubishi Denki Kabushiki Kaisha | Communication device and communication method |
| JP2010154537A (en) * | 1999-03-12 | 2010-07-08 | Daphimo Co Bv Llc | Multi-carrier modulation system adapting rate without disruption and method of the same |
| JP2000324081A (en) * | 1999-05-12 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Transmitter-receiver |
| US6879626B1 (en) | 1999-05-12 | 2005-04-12 | Matsushita Electric Industrial Co., Ltd. | Transmission/reception apparatus and modulation system estimation method |
| US7058132B1 (en) * | 1999-06-21 | 2006-06-06 | Nokia Mobile Phones, Ltd. | Method and arrangement for using a selected signal processing scheme to carry information |
| JP2001024616A (en) * | 1999-07-02 | 2001-01-26 | Hitachi Denshi Ltd | Transmitting method and apparatus thereof |
| JP2001103032A (en) * | 1999-07-23 | 2001-04-13 | Nippon Telegr & Teleph Corp <Ntt> | Ofdm modulation and demodulation circuit |
| US7545882B2 (en) | 1999-07-28 | 2009-06-09 | Panasonic Corporation | Transmission apparatus, reception apparatus and digital radio communication method |
| US8295399B2 (en) | 1999-07-28 | 2012-10-23 | Panasonic Corporation | Transmission apparatus, reception apparatus and digital radio communication method |
| US9106486B2 (en) | 1999-07-28 | 2015-08-11 | Wi-Fi One, Llc | Transmission apparatus, reception apparatus and digital radio communication method |
| US6993092B1 (en) | 1999-07-28 | 2006-01-31 | Matsushita Electric Industrial Co., Ltd. | Transmission apparatus, reception apparatus and digital radio communication method |
| US10498571B2 (en) | 1999-07-28 | 2019-12-03 | Wi-Fi One, Llc | Transmission apparatus, reception apparatus and digital radio communication method |
| US10270631B2 (en) | 1999-07-28 | 2019-04-23 | WiFi One, LLC | Transmission apparatus, reception apparatus and digital radio communication method |
| JP2001103114A (en) * | 1999-07-28 | 2001-04-13 | Matsushita Electric Ind Co Ltd | Transmitter, receiver and digital wireless communication method |
| US9525575B2 (en) | 1999-07-28 | 2016-12-20 | Wi-Fi One, Llc | Transmission apparatus, reception apparatus and digital radio communication method |
| US7359457B2 (en) | 1999-07-28 | 2008-04-15 | Matsushita Electric Indutrial Co., Ltd. | Transmission apparatus, reception apparatus and digital radio communication method |
| JP2004505498A (en) * | 2000-07-25 | 2004-02-19 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Link quality measurement of transmission link in OFDM transmission system |
| CN100414940C (en) * | 2000-07-26 | 2008-08-27 | 松下电器产业株式会社 | Communication terminal apparatus, base station apparatus, and communication method |
| US6788737B1 (en) | 2000-07-26 | 2004-09-07 | Matsushita Electric Industrial Co., Ltd. | Communication terminal apparatus, base station apparatus and communication method |
| JP2002044168A (en) * | 2000-07-26 | 2002-02-08 | Matsushita Electric Ind Co Ltd | Communication terminal, base station unit and communication method |
| US7050488B2 (en) | 2000-07-26 | 2006-05-23 | Matsushita Electric Industrial Co., Ltd. | Communication terminal apparatus and base station apparatus |
| WO2002009377A1 (en) * | 2000-07-26 | 2002-01-31 | Matsushita Electric Industrial Co., Ltd. | Communication terminal apparatus, base station apparatus, and communication method |
| US9219572B2 (en) | 2000-12-15 | 2015-12-22 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| US8934445B2 (en) | 2000-12-15 | 2015-01-13 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
| JP2014195316A (en) * | 2000-12-15 | 2014-10-09 | Adaptix Inc | Adaptive cluster configuration and multiple carrier communication by switching |
| US9344211B2 (en) | 2000-12-15 | 2016-05-17 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| US9203553B1 (en) | 2000-12-15 | 2015-12-01 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| US9191138B2 (en) | 2000-12-15 | 2015-11-17 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| US8891414B2 (en) | 2000-12-15 | 2014-11-18 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
| US8964719B2 (en) | 2000-12-15 | 2015-02-24 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| US8958386B2 (en) | 2000-12-15 | 2015-02-17 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
| US9210708B1 (en) | 2000-12-15 | 2015-12-08 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| US8934375B2 (en) | 2000-12-15 | 2015-01-13 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
| WO2002069591A1 (en) * | 2001-02-27 | 2002-09-06 | Matsushita Electric Industrial Co., Ltd. | Communication device and transmission mode selecting method |
| US6965639B2 (en) | 2001-02-27 | 2005-11-15 | Matsushita Electric Industrial Co., Ltd. | Communication apparatus and transmission technique selection method |
| JP2002290417A (en) * | 2001-03-27 | 2002-10-04 | Hightech Research Kk | Radio lan system adaptable to noise environment |
| JP4678808B2 (en) * | 2001-03-27 | 2011-04-27 | ハイテクリサーチ株式会社 | Noise environment adaptive wireless LAN system |
| US8040965B2 (en) | 2001-05-17 | 2011-10-18 | Qualcomm, Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| JP2004535105A (en) * | 2001-05-17 | 2004-11-18 | クゥアルコム・インコーポレイテッド | Transmission in a multi-channel communication system using selective channel power control |
| US7649954B2 (en) | 2001-05-17 | 2010-01-19 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| US7688899B2 (en) | 2001-05-17 | 2010-03-30 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| JP2011097619A (en) * | 2001-05-17 | 2011-05-12 | Qualcomm Inc | Transmission in multi-channel communication system using selective channel power control |
| JP2009081873A (en) * | 2001-05-17 | 2009-04-16 | Qualcomm Inc | Transmission in multi-channel communication system using selective channel power control |
| US8488706B2 (en) | 2001-05-17 | 2013-07-16 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| US8477858B2 (en) | 2001-05-17 | 2013-07-02 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| JP2002344357A (en) * | 2001-05-18 | 2002-11-29 | Matsushita Electric Ind Co Ltd | Multiband radiocommunication system |
| JP4604393B2 (en) * | 2001-05-18 | 2011-01-05 | パナソニック株式会社 | Multiband wireless communication system |
| JP2004531976A (en) * | 2001-06-14 | 2004-10-14 | クゥアルコム・インコーポレイテッド | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| JP2004531980A (en) * | 2001-06-26 | 2004-10-14 | クゥアルコム・インコーポレイテッド | Method and system for processing data for transmission in a multi-channel communication system using selective channel transmission |
| JP2008263626A (en) * | 2002-02-13 | 2008-10-30 | Interdigital Technol Corp | User equipment |
| JP2008219924A (en) * | 2002-02-13 | 2008-09-18 | Interdigital Technol Corp | Transport block set transmission using hybrid automatic repeat request |
| US10230488B2 (en) | 2002-02-13 | 2019-03-12 | Intel Corporation | User equipment using hybrid automatic repeat request |
| US8341482B2 (en) | 2002-02-13 | 2012-12-25 | Intel Corporation | User equipment using hybrid automatic repeat request |
| US9344252B2 (en) | 2002-02-13 | 2016-05-17 | Intel Corporation | User equipment using hybrid automatic repeat request |
| JP2012085323A (en) * | 2002-02-13 | 2012-04-26 | Interdigital Technology Corp | Transport block set transmission using hybrid automatic repeat request |
| JP2009247008A (en) * | 2002-02-13 | 2009-10-22 | Interdigital Technol Corp | Transport block set transmission using hybrid automatic repeat request |
| JP2006508555A (en) * | 2002-03-21 | 2006-03-09 | エルジー エレクトロニクス インコーポレイティド | Signal transmission method and apparatus in mobile communication system |
| US7324792B2 (en) | 2002-03-21 | 2008-01-29 | Lg Electronics Inc. | Apparatus and method for transmitting signal in mobile communication system |
| JP2010193473A (en) * | 2002-06-20 | 2010-09-02 | Qualcomm Inc | Rate control for multi-channel communication system |
| JP2005535167A (en) * | 2002-06-20 | 2005-11-17 | クゥアルコム・インコーポレイテッド | Rate control for multi-channel communication systems. |
| KR100997632B1 (en) | 2002-06-20 | 2010-12-01 | 퀄컴 인코포레이티드 | Rate control for multi-channel communication systems |
| JP2004104574A (en) * | 2002-09-11 | 2004-04-02 | Mitsubishi Electric Corp | Method for controlling retransmission and communication equipment |
| JP2004228669A (en) * | 2003-01-20 | 2004-08-12 | Matsushita Electric Ind Co Ltd | Transmission apparatus and transmission method |
| US7515649B2 (en) | 2003-04-29 | 2009-04-07 | Lg Electronics Inc. | Signal transmitting method in mobile communication system |
| JP2006524930A (en) * | 2003-04-29 | 2006-11-02 | エルジー エレクトロニクス インコーポレイティド | Signal transmission method in mobile communication system |
| JP2005020076A (en) * | 2003-06-23 | 2005-01-20 | Toshiba Corp | Communication method, transmission apparatus, and reception apparatus |
| JP2005086436A (en) * | 2003-09-08 | 2005-03-31 | Sharp Corp | Radio communication device and radio communication system |
| JP2007509576A (en) * | 2003-10-24 | 2007-04-12 | クゥアルコム・インコーポレイテッド | Speed selection for multi-carrier MIMO systems |
| US7844005B2 (en) | 2005-05-16 | 2010-11-30 | Panasonic Corporation | Multicarrier communication apparatus, integrated circuit, and multicarrier communication method |
| JP2007266719A (en) * | 2006-03-27 | 2007-10-11 | Fujitsu Ltd | Base station equipment, terminal and band control method |
| WO2008041291A1 (en) * | 2006-09-29 | 2008-04-10 | Fujitsu Limited | Base station device |
| US8320402B2 (en) | 2006-09-29 | 2012-11-27 | Fujitsu Limited | Base station for allocating sub-channels to mobile station |
| JP2018140669A (en) * | 2017-02-27 | 2018-09-13 | 株式会社京三製作所 | Information transmission system, transmitter and on-board device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3066483B2 (en) | 2000-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3066483B2 (en) | Digital mobile radio communication method | |
| US11411702B2 (en) | Method and apparatus for generating pilot tone in orthogonal frequency division multiplexing access system, and method and apparatus for estimating channel using it | |
| JP4046712B2 (en) | Subcarrier allocation apparatus and method in orthogonal frequency division multiplexing system | |
| US6977884B2 (en) | Transmitting apparatus, receiving apparatus, communication system, transmission method, reception method, and communication method | |
| US8189516B2 (en) | Apparatus and method for transmitting/receiving packet data control channel in an OFDMA wireless communication system | |
| JP4256158B2 (en) | Wireless communication apparatus and wireless communication method | |
| US8571132B2 (en) | Constrained hopping in wireless communication systems | |
| US8208873B2 (en) | Method and apparatus for adjusting waveform parameters for an adaptive air interface waveform | |
| EP1207661A1 (en) | Adaptive subcarrier loading | |
| EP1549093A2 (en) | Apparatus and method for allocating subchannels adaptively according to frequency reuse rates in an orthogonal frequency division multiple access system | |
| KR20040072817A (en) | Method for reducing feedback channel state information within adaptive OFDMA system and OFDMA system using the same | |
| KR100717828B1 (en) | Method for adaptive transmit power allocation in multiuser ofdm systems | |
| JP4748678B2 (en) | Radio apparatus, program and communication method for adaptively changing pilot signal arrangement | |
| US20070217328A1 (en) | Method for OFDM Transmission With Low Latency, A Base Station, A User Terminal And A Network Therefor | |
| JPH07250116A (en) | Data transmitting method | |
| JP4279646B2 (en) | Communication device | |
| JP4405518B2 (en) | OFDM transmitter, OFDM communication system, and OFDM communication method | |
| US20050007946A1 (en) | Multi-carrier transmission | |
| JP4468160B2 (en) | Subcarrier adaptive control method and apparatus, and radio apparatus | |
| JP4559205B2 (en) | Wireless communication system | |
| KR100836152B1 (en) | A mobile communication terminal and a method for measuring channel quality thereof | |
| JP4425811B2 (en) | OFDM transmission method, OFDM transmission apparatus, and OFDM transmission program | |
| JP2002141884A (en) | Transmitter for orthogonal frequency division multiplex signal, receiver for the same and transmitter and receiver for the same | |
| Hamaguchi et al. | Multicarrier/QAM-level-controlled adaptive modulation for land mobile communication systems | |
| JP2010035212A (en) | Ofdm transmission method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |