JP2001177486A - Band assignment device, transmission system and band assignment method - Google Patents
Band assignment device, transmission system and band assignment methodInfo
- Publication number
- JP2001177486A JP2001177486A JP36173299A JP36173299A JP2001177486A JP 2001177486 A JP2001177486 A JP 2001177486A JP 36173299 A JP36173299 A JP 36173299A JP 36173299 A JP36173299 A JP 36173299A JP 2001177486 A JP2001177486 A JP 2001177486A
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- Prior art keywords
- band
- allocated
- bands
- allocating
- signal
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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、複数の帯域幅の変
調信号を同時に伝送する際の隣接チャネル漏洩電力を抑
圧する帯域割当装置および方法、ならびに該装置を備え
た伝送システムに関する。本発明は、移動通信に代表さ
れる無線通信、CATV等を伝送する有線通信に適用可
能である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band allocating apparatus and method for suppressing adjacent channel leakage power when transmitting modulated signals of a plurality of bandwidths at the same time, and a transmission system provided with the apparatus. INDUSTRIAL APPLICABILITY The present invention is applicable to wireless communication represented by mobile communication, wired communication transmitting CATV, and the like.
【0002】[0002]
【従来の技術】従来、複数の方式(帯域幅)の変調信号
を同時に伝送する場合、狭帯域の変調信号の周波数配置
(帯域割当)を特に検討しないか、検討したとしても、
その方式内で歪の影響が小さくなるような周波数配置を
検討することが多かった。(占有)帯域幅の異なる他方
式に対する影響については、全体の波数等による歪の最
悪値(コンポジット)が検討されているが、これはあく
までもCW(ContinuousWave:無変調波)による評価で
あり、変調波を伝送し、さらに隣接チャネル漏洩電力に
対する検討はされていない。2. Description of the Related Art Conventionally, when simultaneously transmitting modulation signals of a plurality of systems (bandwidths), the frequency allocation (bandwidth allocation) of narrowband modulation signals is not particularly considered, or even if it is considered,
In many cases, frequency arrangements in which the influence of distortion is reduced within the system are often studied. Regarding the influence on other systems with different (occupied) bandwidths, the worst value (composite) of distortion due to the entire wave number and the like has been studied, but this is only an evaluation based on CW (Continuous Wave: unmodulated wave). No consideration has been given to the transmission of waves and the adjacent channel leakage power.
【0003】[0003]
【発明が解決しようとする課題】実際に変調信号を伝送
した時の歪の影響を基に検討を行う。移動通信方式の変
調信号を伝送し、かつ複数の方式の信号がある場合に、
伝送する波数が増加し、歪の影響が大きくなる。異なる
方式の信号間で生じるトリプルビートが伝送する信号の
帯域外に漏洩するのを防ぐことにより、占有帯域幅の広
い変調信号を持つ方式の隣接チャネルの漏洩電力の影響
をなるべく小さくすることができる。これにより、広帯
域信号の方式における通話品質を良好に保つことが可能
となり、また、狭帯域信号を伝送する波数を増加させる
ことも可能となる。An examination will be made on the basis of the influence of distortion when a modulated signal is actually transmitted. When transmitting a modulated signal of a mobile communication system and there are signals of a plurality of systems,
The number of waves to be transmitted increases, and the influence of distortion increases. By preventing the triple beat generated between signals of different systems from leaking out of the band of the transmitted signal, it is possible to minimize the influence of the leakage power of the adjacent channel of the system having a modulation signal with a wide occupied bandwidth. . This makes it possible to maintain good communication quality in a wideband signal system, and to increase the number of waves transmitting a narrowband signal.
【0004】狭帯域(変調)信号がN波、広帯域(変
調)信号が1波存在する場合、N波の狭帯域信号のうち
の任意の2波と広帯域信号1波によるトリプルビートの
合計の電力TB[dBm]は、狭帯域信号2波による3
次相互変調歪をIM800Mとし、狭帯域信号2波と広帯域
信号1波のレベルが同じであるとすると次式で表され
る。[0004] When there are N narrowband (modulation) signals and one wideband (modulation) signal, the total power of the triple beats of any two of the N narrowband signals and one wideband signal. TB [dBm] is 3 by two narrowband signals.
Assuming that the next intermodulation distortion is IM 800M and that the levels of two narrow-band signals and one wide-band signal are the same, the following equation is obtained.
【0005】[0005]
【数1】 (Equation 1)
【0006】この電力の内一部は帯域外に漏洩し、隣接
チャネル漏洩電力の劣化原因になる。漏洩電力は狭帯域
信号の周波数間隔(帯域間の間隔)Δfを用いて次式で
表される。[0006] A part of the power leaks out of the band, which causes deterioration of adjacent channel leak power. The leakage power is expressed by the following equation using the frequency interval (inter-band interval) Δf of the narrowband signal.
【0007】[0007]
【数2】 (Equation 2)
【0008】ここで、Pdsは無変調波(狭帯域)2波と
広帯域変調波1波により生じたトリプルビートの雑音電
力密度である。Here, P ds is a triple beat noise power density generated by two unmodulated waves (narrow band) and one wide band modulated wave.
【0009】図1は、4つの狭帯域信号11〜14、お
よび1つの広帯域信号21が存在する場合の例である。
狭帯域信号11と狭帯域信号12、狭帯域信号12と狭
帯域信号13、および狭帯域信号12と狭帯域信号13
の周波数間隔はそれぞれΔfである。FIG. 1 shows an example in which four narrowband signals 11 to 14 and one wideband signal 21 are present.
Narrow band signal 11 and narrow band signal 12, narrow band signal 12 and narrow band signal 13, and narrow band signal 12 and narrow band signal 13
Are Δf.
【0010】図2は、図1に示す4つの狭帯域信号11
〜14と広帯域信号21とを合成し、同時に伝送した場
合における広帯域信号21とトリプルビートおよび隣接
チャネル漏洩電力との関係を示す図である。狭帯域信号
の周波数間隔Δfが小さい場合のトリプルビートがトリ
プルビート31であり、Δfが大きい場合のトリプルビ
ートがトリプルビート32である。斜線部はトリプルビ
ート32における隣接チャネル漏洩電力である。これよ
り、Δfが大きくなると、隣接チャネル漏洩電力が大き
くなることがわかる。FIG. 2 shows the four narrow band signals 11 shown in FIG.
14 is a diagram illustrating a relationship between the wideband signal 21 and the triple beat and adjacent channel leakage power when the signals are combined and transmitted at the same time. FIG. A triple beat when the frequency interval Δf of the narrow band signal is small is a triple beat 31, and a triple beat when the frequency interval Δf is large is a triple beat 32. The hatched portion indicates the adjacent channel leakage power in the triple beat 32. From this, it can be seen that as Δf increases, the adjacent channel leakage power increases.
【0011】以上から、狭帯域信号の周波数間隔Δfを
狭く(小さく)した方が、隣接チャネル漏洩電力を抑圧
できることがわかる。隣接チャネル漏洩電力を抑圧でき
れば、狭帯域信号の波数を増やすことができる。From the above, it can be seen that the narrower (smaller) frequency interval Δf of the narrowband signal can suppress the adjacent channel leakage power. If the adjacent channel leakage power can be suppressed, the wave number of the narrowband signal can be increased.
【0012】広帯域信号の隣接の周波数は他の事業者が
使用する場合があり、不要な漏洩電力をなるべく少なく
したい。一方で、装置をなるべく低価格で実現するには
歪の性能の改善度をなるべく抑える必要がある。本発明
により、新たに伝送する信号を増やした場合でも、装置
価格をなるべく抑えることが可能である。The frequency adjacent to the wideband signal may be used by another carrier, and it is desired to reduce unnecessary leakage power as much as possible. On the other hand, in order to realize the device at as low a price as possible, it is necessary to suppress the degree of improvement in distortion performance as much as possible. According to the present invention, even when the number of signals to be newly transmitted is increased, it is possible to reduce the apparatus price as much as possible.
【0013】図3は、4つの狭帯域信号41〜44に帯
域を割り当てる例を示す図である。狭帯域信号に割り当
てる帯域間の最小間隔(最小周波数間隔)Δf0が定め
られている場合、図3(b)のように帯域を割り当てる
ことが好ましく、図3(a)のように帯域を割り当てる
ことは好ましくない。ここで、Δf1、Δf2およびΔf
3はいずれもΔf0より大きい。FIG. 3 is a diagram showing an example in which bands are allocated to four narrow band signals 41 to 44. When the minimum interval (minimum frequency interval) Δf 0 between the bands to be allocated to the narrowband signal is determined, it is preferable to allocate the band as shown in FIG. 3B, and allocate the band as shown in FIG. It is not preferable. Where Δf 1 , Δf 2 and Δf
3 is larger than Δf 0 .
【0014】図4は、変調信号に割り当てることができ
る帯域51〜58があらかじめ定められている場合にお
いて、4つの狭帯域信号に帯域を割り当てる例を示す図
である。図4(a)では4つの変調信号に帯域51、5
3、56、58を割り当てており、図4(b)では4つ
の変調信号に帯域51、52、53、54を割り当てて
いる。この場合、図4(b)のように帯域を割り当てる
ことが好ましく、図4(a)のように帯域を割り当てる
ことは好ましくない。すなわち、図4(b)のように、
割り当てる帯域間の間隔が可能な限り小さくなるように
割り当てることが好ましい。FIG. 4 is a diagram showing an example in which bands are allocated to four narrowband signals when bands 51 to 58 that can be allocated to the modulation signal are predetermined. In FIG. 4A, the bands 51, 5 are assigned to the four modulated signals.
3, 56 and 58 are allocated, and in FIG. 4B, bands 51, 52, 53 and 54 are allocated to four modulation signals. In this case, it is preferable to allocate a band as shown in FIG. 4B, and it is not preferable to allocate a band as shown in FIG. That is, as shown in FIG.
It is preferable to assign so that the interval between assigned bands is as small as possible.
【0015】本発明の目的は、複数の帯域幅の変調信号
を同時に伝送する場合に、隣接チャネル漏洩電力を抑圧
することである。An object of the present invention is to suppress adjacent channel leakage power when simultaneously transmitting modulated signals of a plurality of bandwidths.
【0016】[0016]
【課題を解決するための手段】上記目的を達成するため
に、請求項1に記載の発明は、帯域割当装置であって、
複数の変調信号に帯域を割り当てる際に、変調信号に割
り当てる帯域間の最小間隔が定められている場合には、
割り当てる帯域間の間隔が前記最小間隔になるように帯
域を割り当てることを特徴とする。In order to achieve the above object, an invention according to claim 1 is a band allocation device,
When assigning a band to a plurality of modulation signals, if a minimum interval between bands to be assigned to the modulation signal is determined,
Bands are allocated so that an interval between bands to be allocated becomes the minimum interval.
【0017】請求項2に記載の発明は、帯域割当装置で
あって、複数の変調信号に帯域を割り当てる際に、変調
信号に割り当てることができる帯域があらかじめ定めら
れている場合には、割り当てる帯域間の間隔が可能な限
り小さくなるように割り当てることを特徴とする。According to a second aspect of the present invention, there is provided a band allocating apparatus, wherein when allocating a band to a plurality of modulation signals, a band that can be allocated to the modulation signal is determined in advance. It is characterized in that the assignment is made such that the interval between them is as small as possible.
【0018】請求項3に記載の発明は、帯域割当装置で
あって、請求項1または2に記載の帯域割当装置を複数
備え、該帯域割当装置により帯域を割り当てた変調信号
を合成する合成装置をさらに備えたことを特徴とする。According to a third aspect of the present invention, there is provided a band allocating apparatus, comprising a plurality of the band allocating apparatuses according to the first or second aspect, wherein the band allocating apparatus synthesizes a modulated signal to which a band is allocated. Is further provided.
【0019】請求項4に記載の発明は、伝送システムで
あって、請求項1または2に記載の帯域割当装置と、変
調信号に帯域を割り当てる他の帯域割当装置と、前記請
求項1または2に記載の帯域割当装置により帯域を割り
当てた変調信号と、前記他の帯域割当装置により帯域を
割り当てた変調信号とを合成する合成装置とを備え、前
記請求項1または2に記載の帯域割当装置により割り当
てる帯域幅は、前記他の帯域割当装置により割り当てる
帯域幅よりも狭いことを特徴とする。According to a fourth aspect of the present invention, there is provided a transmission system, wherein the bandwidth allocating apparatus according to the first or second aspect, another bandwidth allocating apparatus for allocating a bandwidth to a modulated signal, and the first or second aspect. 3. A band allocating apparatus according to claim 1, further comprising: a synthesizing apparatus for synthesizing a modulated signal to which a band is allocated by the band allocating apparatus according to claim 1 and a modulated signal to which a band is allocated by the other band allocating apparatus. Is narrower than the bandwidth allocated by the other band allocation device.
【0020】請求項5に記載の発明は、帯域割当方法で
あって、複数の変調信号に帯域を割り当てる際に、変調
信号に割り当てる帯域間の最小間隔が定められている場
合には、割り当てる帯域間の間隔が前記最小間隔になる
ように帯域を割り当てることを特徴とする。According to a fifth aspect of the present invention, there is provided a band allocating method, wherein when allocating a band to a plurality of modulated signals, a minimum interval between bands to be allocated to the modulated signals is determined. Bands are allocated so that an interval between them becomes the minimum interval.
【0021】請求項6に記載の発明は、帯域割当方法で
あって、複数の変調信号に帯域を割り当てる際に、変調
信号に割り当てることができる帯域があらかじめ定めら
れている場合には、割り当てる帯域間の間隔が可能な限
り小さくなるように割り当てることを特徴とする。According to a sixth aspect of the present invention, there is provided a band allocating method, wherein when allocating a band to a plurality of modulation signals, if a band that can be allocated to the modulation signal is predetermined, the band to be allocated is determined. It is characterized in that the assignment is made such that the interval between them is as small as possible.
【0022】以上の構成によれば、複数の帯域幅の変調
信号を同時に伝送する場合に、隣接チャネル漏洩電力を
抑圧することができる。According to the configuration described above, adjacent channel leakage power can be suppressed when transmitting modulated signals of a plurality of bandwidths simultaneously.
【0023】[0023]
【発明の実施の形態】以下、図面を参照しつつ本発明の
実施の形態について詳しく説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【0024】図5は、本発明の実施形態に係る伝送シス
テムの構成例を示す図である。図5に示す伝送システム
は、建物内で電波の届きにくい場所に移動通信サービス
を提供するためのシステムである。図5に示す伝送シス
テムは、帯域割当装置111〜113、合成装置12
1、光電変換装置131〜133、光ファイバ141、
およびアンテナ151、152を備える。FIG. 5 is a diagram showing a configuration example of a transmission system according to the embodiment of the present invention. The transmission system shown in FIG. 5 is a system for providing a mobile communication service to a place in a building where radio waves are difficult to reach. The transmission system shown in FIG.
1, photoelectric conversion devices 131 to 133, optical fiber 141,
And antennas 151 and 152.
【0025】帯域割当装置111〜113は、移動機1
61、162との間でやりとりする変調信号に帯域を割
り当てる。帯域割当装置111〜113は基地局の形態
をとることができ、それぞれ異なるサービスを提供す
る。本実施形態において、帯域割当装置111、112
はそれぞれ800MHz帯および1.5GHz帯のPD
C信号に対して幅の狭い帯域(例えば、帯域幅20kH
z)を割り当て、帯域割当装置113は2GHz帯の変
調信号(例えば、IMT−2000で使用される変調信
号)に幅の広い帯域(例えば、帯域幅5MHz)を割り
当てる。The band allocating devices 111 to 113
A band is allocated to a modulated signal exchanged between the control signals 61 and 162. The band allocation devices 111 to 113 can take the form of base stations, and provide different services. In the present embodiment, the bandwidth allocating devices 111 and 112
Are PDs of 800MHz band and 1.5GHz band respectively
A narrow band (for example, a bandwidth of 20 kHz
z), and the band allocating device 113 allocates a wide band (for example, 5 MHz bandwidth) to a 2 GHz band modulated signal (for example, a modulated signal used in IMT-2000).
【0026】帯域割当装置111〜113から移動機1
61、162に向けられた各変調信号は、合成装置12
1で合成され、光電変換装置131で電気信号から光信
号に変換される。光信号は光ファイバ141を通って光
電変換装置132、133に達し、再び電気信号に変換
され、アンテナを通じて移動機161、162に向けて
送信される。移動機161、162から帯域割当装置1
11〜113に向けられた変調信号については以上の処
理と逆の処理がなされる。From the band allocating apparatuses 111 to 113, the mobile station 1
Each modulated signal directed to 61, 162 is
1 and are converted by the photoelectric conversion device 131 from an electric signal to an optical signal. The optical signal reaches the photoelectric conversion devices 132 and 133 through the optical fiber 141, is converted into an electric signal again, and is transmitted to the mobile devices 161 and 162 through the antenna. From the mobile units 161 and 162, the band allocation device 1
For the modulated signals directed to 11 to 113, the reverse of the above processing is performed.
【0027】帯域割当装置111〜113は、複数の変
調信号に帯域を割り当てる際に、変調信号に割り当てる
帯域間の最小間隔が定められている場合には、割り当て
る帯域間の間隔がその最小間隔になるように帯域を割り
当てる。変調信号に割り当てる帯域間の最小間隔は、隣
接チャネル漏洩電力、受信機の選択度等を考慮して定め
られるのが一般的である。PDC信号に割り当てる帯域
間の最小間隔としては、例えば50kHzや100kH
zが考えられる。When allocating a band to a plurality of modulation signals, the band allocating devices 111 to 113 set the interval between bands to be allocated to the minimum interval if the minimum interval between bands to be allocated to the modulation signal is determined. Allocate bandwidth so that Generally, the minimum interval between bands allocated to the modulation signal is determined in consideration of adjacent channel leakage power, selectivity of a receiver, and the like. The minimum interval between the bands allocated to the PDC signal is, for example, 50 kHz or 100 kHz.
z can be considered.
【0028】また、帯域割当装置111〜113は、複
数の変調信号に帯域を割り当てる際に、変調信号に割り
当てることができる帯域があらかじめ定められている場
合には、割り当てる帯域間の間隔が可能な限り小さくな
るように割り当てる。When allocating a band to a plurality of modulation signals, the band allocating devices 111 to 113 can set an interval between bands to be allocated if a band that can be allocated to the modulation signal is predetermined. Assign as small as possible.
【0029】狭帯域信号による広帯域信号の隣接チャネ
ル漏洩電力を抑圧する観点からは、幅の広い帯域を割り
当てる帯域割当装置113は従来の帯域割当装置であっ
てもよい。From the viewpoint of suppressing the adjacent channel leakage power of the wideband signal due to the narrowband signal, the band allocating device 113 that allocates a wide band may be a conventional band allocating device.
【0030】[0030]
【発明の効果】以上説明したように本発明によれば、複
数の帯域幅の変調信号を同時に伝送する場合に、隣接チ
ャネル漏洩電力を抑圧することができる。As described above, according to the present invention, it is possible to suppress adjacent channel leakage power when simultaneously transmitting modulated signals of a plurality of bandwidths.
【図1】4つの狭帯域信号、および1つの広帯域信号が
存在する場合の例である。FIG. 1 is an example where four narrowband signals and one wideband signal are present.
【図2】図1に示す4つの狭帯域信号と広帯域信号とを
合成し、同時に伝送した場合における広帯域信号とトリ
プルビートおよび隣接チャネル漏洩電力との関係を示す
図である。FIG. 2 is a diagram showing a relationship between a wideband signal, triple beats, and adjacent channel leakage power when four narrowband signals and a wideband signal shown in FIG. 1 are combined and simultaneously transmitted.
【図3】4つの狭帯域信号に帯域を割り当てる例を示す
図である。FIG. 3 is a diagram illustrating an example of allocating bands to four narrowband signals.
【図4】変調信号に割り当てることができる帯域があら
かじめ定められている場合において、4つの狭帯域信号
に帯域を割り当てる例を示す図である。FIG. 4 is a diagram illustrating an example in which bands are allocated to four narrowband signals when bands that can be allocated to modulated signals are predetermined.
【図5】本発明の実施形態に係る伝送システムの構成例
を示す図である。FIG. 5 is a diagram illustrating a configuration example of a transmission system according to an embodiment of the present invention.
11〜14、41〜44 狭帯域信号 21 広帯域信号 31、32 トリプルビート 51〜58 帯域 111〜113 帯域割当装置 121 合成装置 131 光電変換装置 141 光ファイバ 151、152 アンテナ 161、162 移動機 11 to 14, 41 to 44 Narrow band signal 21 Wide band signal 31, 32 Triple beat 51 to 58 Band 111 to 113 Band allocation device 121 Synthesizing device 131 Photoelectric conversion device 141 Optical fiber 151, 152 Antenna 161, 162 Mobile device
Claims (6)
に、変調信号に割り当てる帯域間の最小間隔が定められ
ている場合には、割り当てる帯域間の間隔が前記最小間
隔になるように帯域を割り当てることを特徴とする帯域
割当装置。When allocating a band to a plurality of modulation signals, if a minimum interval between bands to be allocated to the modulation signal is determined, the band is allocated so that an interval between bands to be allocated becomes the minimum interval. A bandwidth allocating apparatus characterized by the above-mentioned.
に、変調信号に割り当てることができる帯域があらかじ
め定められている場合には、割り当てる帯域間の間隔が
可能な限り小さくなるように割り当てることを特徴とす
る帯域割当装置。2. When allocating a band to a plurality of modulation signals, if a band that can be allocated to the modulation signal is predetermined, it is preferable to allocate the band so that the interval between the allocated bands is as small as possible. Characteristic band allocation device.
を複数備え、該帯域割当装置により帯域を割り当てた変
調信号を合成する合成装置をさらに備えたことを特徴と
する伝送システム。3. A transmission system comprising a plurality of the band allocating devices according to claim 1 or 2, further comprising a synthesizing device for synthesizing a modulated signal to which a band is allocated by the band allocating device.
と、 変調信号に帯域を割り当てる他の帯域割当装置と、 前記請求項1または2に記載の帯域割当装置により帯域
を割り当てた変調信号と、前記他の帯域割当装置により
帯域を割り当てた変調信号とを合成する合成装置とを備
え、前記請求項1または2に記載の帯域割当装置により
割り当てる帯域幅は、前記他の帯域割当装置により割り
当てる帯域幅よりも狭いことを特徴とする伝送システ
ム。4. A band allocating device according to claim 1 or 2, another band allocating device that allocates a band to a modulated signal, and a modulated signal having a band allocated by the band allocating device according to claim 1 or 2. And a synthesizing device for synthesizing a modulated signal to which a band has been allocated by the other band allocating device, wherein a bandwidth allocated by the band allocating device according to claim 1 or 2 is determined by the other band allocating device. A transmission system characterized by being narrower than an allocated bandwidth.
に、変調信号に割り当てる帯域間の最小間隔が定められ
ている場合には、割り当てる帯域間の間隔が前記最小間
隔になるように帯域を割り当てることを特徴とする帯域
割当方法。5. When assigning a band to a plurality of modulation signals, if a minimum interval between bands to be assigned to the modulation signal is determined, the band is assigned so that the interval between the bands to be assigned is the minimum interval. A bandwidth allocation method characterized by the above-mentioned.
に、変調信号に割り当てることができる帯域があらかじ
め定められている場合には、割り当てる帯域間の間隔が
可能な限り小さくなるように割り当てることを特徴とす
る帯域割当方法。6. When allocating a band to a plurality of modulation signals, if a band that can be allocated to the modulation signal is determined in advance, the band is allocated so that the interval between the allocated bands is as small as possible. Characteristic band allocation method.
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JP36173299A JP2001177486A (en) | 1999-12-20 | 1999-12-20 | Band assignment device, transmission system and band assignment method |
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JP36173299A JP2001177486A (en) | 1999-12-20 | 1999-12-20 | Band assignment device, transmission system and band assignment method |
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Publication Number | Publication Date |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011249997A (en) * | 2010-05-25 | 2011-12-08 | Kyocera Corp | Receiving device and base station |
JP2013517652A (en) * | 2010-01-12 | 2013-05-16 | ノキア シーメンス ネットワークス オサケユキチュア | Apparatus and method for scheduling in carrier aggregation type communication system based on transmission / reception / frequency gap band |
US8971430B2 (en) | 2010-05-25 | 2015-03-03 | Kyocera Corporation | Receiving device, base station and wireless communication terminal |
-
1999
- 1999-12-20 JP JP36173299A patent/JP2001177486A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013517652A (en) * | 2010-01-12 | 2013-05-16 | ノキア シーメンス ネットワークス オサケユキチュア | Apparatus and method for scheduling in carrier aggregation type communication system based on transmission / reception / frequency gap band |
US8948110B2 (en) | 2010-01-12 | 2015-02-03 | Cellular Communications Equipment Llc | Apparatus and method for scheduling in carrier aggregated communication systems based on a transmit-receive-frequency gap band |
JP2011249997A (en) * | 2010-05-25 | 2011-12-08 | Kyocera Corp | Receiving device and base station |
US8971430B2 (en) | 2010-05-25 | 2015-03-03 | Kyocera Corporation | Receiving device, base station and wireless communication terminal |
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