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    • 3. 发明专利
    • 受信装置及び受信方法
    • 接收和接收方法
    • JP2015029256A
    • 2015-02-12
    • JP2014087806
    • 2014-04-22
    • 三菱電機株式会社Mitsubishi Electric Corp
    • KAIZU AKIKADOTA YUKIHIROASAHINA TSUTOMUSHINPO DAISUKE
    • H04B7/08H04J11/00
    • H04B7/0885H04B7/082H04B7/0842H04L1/04H04L1/0631H04L1/20H04L5/0048H04L25/0204H04L27/01
    • 【課題】既知信号がシングルキャリアで伝送される伝送方式においても、既知信号の等化を行う回路を別途備えずに、信号品質を推定して、ダイバーシチ合成を行うことができるようにすること。【解決手段】アンテナ101−iで受信された信号を直交復調する信号直交復調部111−iと、直交復調された信号に含まれている既知信号から遅延プロファイルを検出して、その遅延プロファイルから伝送路を推定する伝送路推定部116−iと、その伝送路推定結果を用いて、直交復調された信号に含まれているデータ信号を等化して、合成部に出力する信号等化部119—iと、遅延プロファイルに含まれている信号成分の電力と雑音成分の電力との比に基づいた信号品質を推定して、その結果を合成部に出力する信号品質推定回路123−iとを備え、合成部は、信号品質に基づきデータ信号の重み付けを決定しダイバーシチ合成を行う。【選択図】図2
    • 要解决的问题:提供一种接收机和接收方法,通过对信号质量的估计可以进行分集合成,而不需另外提供用于均衡已知信号的电路,即使在布置成使得已知信号由单载波传输的传输系统中也是如此。 解决方案:接收机包括:信号正交解调部分111-i,其可操作以对由天线101-i接收的信号执行正交解调; 传输路径估计部分116-i,用于从包括在经过正交解调的信号中的已知信号中检测延迟分布,并估计来自延迟分布的传输路径; 信号均衡部分119-i,用于通过使用传输路径估计的结果对包含在经过正交解调的信号中的数据信号进行均衡,并输出到合成部分; 以及信号质量估计电路123-i,其可操作以基于延迟分布中包括的信号分量的电功率与噪声分量的电功率的比值来估计信号质量,并将估计结果输出到合成 部分。 合成部分基于信号质量确定数据信号的权重,并进行分集合成。
    • 7. 发明专利
    • Base station and radio resource allocation method
    • 基站和无线资源分配方法
    • JP2012249087A
    • 2012-12-13
    • JP2011119365
    • 2011-05-27
    • Kyocera Corp京セラ株式会社
    • NAKASATO YUKI
    • H04W72/04H04B1/713H04B7/10H04J11/00H04J99/00H04W16/28
    • H04L5/0037H04B7/0617H04B7/0842H04W72/044H04W72/0446H04W72/0453
    • PROBLEM TO BE SOLVED: To provide a technique capable of improving transmission performance of a base station communicating with a communication terminal, by controlling transmission directivity of a plurality of antennas.SOLUTION: For each of a plurality of communication terminals, a radio resource allocator 122 sets the transmission signal frequency bandwidth of a known signal to be transmitted from each communication terminal to a minimum bandwidth out of a plurality of settable bandwidths. For a unit period including an uplink communication period for known signal transmission from the communication terminal and a plurality of downlink communication periods in which downlink communication is performed and which appear after the uplink communication period, a radio resource allocator 122 allocates a downlink radio resource that includes in the frequency direction a frequency band included in the transmission frequency band of the known signal and includes in a time direction a plurality of downlink communication periods included in the unit period, to a communication terminal that transmits the known signal in the uplink communication period included in the unit period, as a use downlink radio resource.
    • 要解决的问题:通过控制多个天线的传输方向性,提供能够改善与通信终端通信的基站的传输性能的技术。 解决方案:对于多个通信终端中的每一个,无线电资源分配器122将要从每个通信终端发送的已知信号的发送信号频率带宽设置为多个可设置带宽中的最小带宽。 对于包括来自通信终端的已知信号发送的上行链路通信期间和执行下行链路通信的多个下行链路通信期间并且在上行链路通信期间之后出现的单位期间,无线资源分配器122分配下行链路无线资源, 在频率方向上包括已知信号的发送频带中包含的频带,并且在时间方向上包括在该单位期间中包含的多个下行链路通信期间,向在上行链路通信期间发送已知信号的通信终端 包括在单位期间内,作为使用下行无线电资源。 版权所有(C)2013,JPO&INPIT
    • 10. 发明专利
    • Communication device and communication method
    • 空值
    • JP4986349B2
    • 2012-07-25
    • JP2001255294
    • 2001-08-24
    • ソニー インターナショナル (ヨーロッパ) ゲゼルシャフト ミット ベシュレンクテル ハフツング
    • 誠一 泉
    • H04J11/00H04B7/02H04B7/06H04L1/06H04L25/02H04L27/26
    • H04L27/263H04B1/0475H04B1/0483H04B7/0413H04B7/0613H04B7/0615H04B7/0626H04B7/066H04B7/0697H04B7/0842H04B7/0857H04L1/0001H04L1/06H04L5/0003H04L5/0007H04L5/0023H04L5/0044H04L5/005H04L5/0058H04L25/0204H04L25/0224H04L25/0242H04L27/2628H04L27/2647H04W52/02Y02D70/00Y02D70/40Y02D70/444
    • The present invention relates to a communication device for receiving and transmitting OFDM signals in a wireless communication system, in which each OFDM signal is composed of a plurality of subcarrier signals each being assigned to a respective transmission channel of said communication system, comprising diversity antenna means (10) including a plurality of antenna elements (12); examination means (26) adapted for examining, individually for each antenna element (12), at least one subcarrier signal of an OFDM reception signal received by a respective one of said antenna elements (12) and for gaining, from the result of such subcarrier signal examination, attenuation information on attenuation properties of at least some of the transmission channels associated to the respective antenna element (12); and amplitude adjustment means (30) adapted for adjusting, individually for each antenna element (12), the amplitude of at least one subcarrier signal of an OFDM transmission signal to be transmitted from a respective one of said antenna elements (12) in accordance with said attenuation information, such as to give a higher amplitude to said subcarrier signal of said OFDM transmission signal when said attenuation information indicates a lower attenuation of the associated transmission channel, and to give a lower amplitude to said subcarrier signal of said OFDM transmission signal when said attenuation information indicates a higher attenuation of the associated transmission channel. In this way, transmission of useless energy on heavily disturbed transmission channels can be avoided.
    • 本发明涉及一种用于在无线通信系统中接收和发送OFDM信号的通信设备,其中每个OFDM信号由分配给所述通信系统的相应传输信道的多个子载波信号组成,包括分集天线装置 (10),包括多个天线元件(12); 检测装置(26),其适于单独地检查每个天线元件(12)中由所述天线元件(12)中的相应一个接收的OFDM接收信号的至少一个子载波信号,并从所述子载波的结果中获得 信号检查,关于与相应天线元件(12)相关联的至少一些传输信道的衰减特性的衰减信息; 和幅度调整装置(30),适于对于每个天线元件(12)单独地调整要从所述天线元件(12)中的相应一个发送的OFDM传输信号的至少一个副载波信号的幅度, 所述衰减信息,例如当所述衰减信息指示相关联的传输信道的较低衰减时给予所述OFDM传输信号的所述子载波信号更高的幅度,并且为所述OFDM传输信号的所述子载波信号提供较低的振幅, 所述衰减信息指示相关传输信道的较高衰减。 以这种方式,可以避免在严重干扰的传输信道上传输无用能量。