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公开(公告)号：EP1551124A4
公开(公告)日：2008-03-12
申请号：EP03772765
申请日：2003-11-14
发明人： SUDO HIROAKI
IPC分类号： H04J99/00 , H04B7/04 , H04B7/06 , H04B7/08 , H04J11/00 , H04J13/00 , H04J13/16 , H04L1/00 , H04L1/18
CPC分类号： H04L1/0003 , H04B2201/70703 , H04L1/18
摘要： An S/P converting part (101) converts input signals (A1,A2,B1,B2,...K1,K2) to be transmitted into parallel data that have been separated for transmitting systems. Spreading parts (102,103) spread, under the control of a spreading control part (107), the respective data. Adding parts (104-1,104-2) multiplex the spread data. Transmitting parts (105-1,105-2) subject the multiplexed signals to radio transmission processings, and radio-transmit these data via antennas (106-1,106-2). The spreading control part (107) controls, based on a line quality, the spreading manners in the spreading parts (102,103). In this way, when different data are transmitted from the respective antennas, the frequency utilization efficiency can be maintained, while the received-data error rate characteristic can be improved.
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公开(公告)号：EP1564920A4
公开(公告)日：2008-11-05
申请号：EP03774003
申请日：2003-11-13
发明人： SUDO HIROAKI
CPC分类号： H04L27/2605 , H04L1/0006 , H04L1/0066 , H04L1/08 , H04L1/1877
摘要： A control part (101) outputs to a selection part (107) retransmission information as to whether a transmission signal is a retransmission signal or not and further, if yes, as to how-manieth retransmission signal it is. A spread part (102) spreads the transmission signal. An IFFT part (103) subjects the transmission signal to an orthogonal frequency division multiplex processing. A GI insertion part (104) inserts a guard section into the transmission signal. A GI insertion part (105) inserts, into the transmission signal, a guard section that is longer than the one inserted by the GI insertion part (104). A GI insertion part (106) inserts, into the transmission signal, a guard section that is longer than the ones inserted by the GI insertion parts (104,105). The selection part (107) selects, based on the retransmission information inputted from the control part (101), a transmission signal into which a longer guard section has been inserted as the number of retransmissions has become larger. This can prevent a transmission delay from becoming longer due to an excessively increased number of retransmissions with substantially no degradation of transmission efficiency.
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公开(公告)号：EP1124344A4
公开(公告)日：2006-06-21
申请号：EP00949893
申请日：2000-07-26
发明人： SUDO HIROAKI
CPC分类号： H04L27/2602 , H04L1/0071 , H04L1/04 , H04L1/1819 , H04L1/1893
摘要： An OFDM communication device comprises interleaving means for differently interleaving a transmission signal, a selecting means for selecting one of the interleaving means so as to interleaving the transmission signal, and an OFDM means for carrying out an OFDM processing of the interleaved transmission signal.
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4.发明公开OFDM TRANSMITTING/RECEIVING DEVICE AND METHOD 审中-公开VORRICHTUNG UND VERFAHRENFÜROFDM SENDER /EMPFÄNGER
公开(公告)号：EP1043857A4
公开(公告)日：2006-01-04
申请号：EP99954362
申请日：1999-11-04
发明人： SUDO HIROAKI , ISHIKAWA KIMIHIKO
CPC分类号： H04W52/42 , H04L5/0007 , H04L5/0046 , H04L27/2614 , H04L27/2637 , H04L27/2646 , H04L27/2653 , H04W52/346
摘要： A coefficient signal for each sub-carrier is calculated by calculating an average of receiving powers of sub-carriers (A to D) in a control circuit (162) and by dividing the average by an envelope of each sub-carrier (A to D). A transmission signal of each sub-carrier (A to D) output from each of relative mapping circuits (102 to 105) is multiplied by a coefficient signal in each multiplier (106 to 109), whereby powers received at sub-carriers are approximately uniformed to improve error rate characteristics.
摘要翻译： 通过计算控制电路（162）中副载波（A至D）的接收功率的平均值并通过将平均值除以每个副载波（A至D）的包络来计算每个副载波的系数信号 ）。 从每个相关映射电路（102至105）输出的每个副载波（A至D）的传输信号在每个乘法器（106至109）中乘以系数信号，由此在副载波接收的功率近似均匀 以改善错误率特性。
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公开(公告)号：EP1286481A4
公开(公告)日：2003-09-17
申请号：EP02717162
申请日：2002-04-16
发明人： SUDO HIROAKI
IPC分类号： H04L5/16 , H04B7/005 , H04B7/06 , H04B7/08 , H04B7/26 , H04J11/00 , H04W52/10 , H04W52/12 , H04W52/14 , H04W52/42 , H04W52/58
CPC分类号： H04W52/10 , H04B7/0817 , H04B7/0857 , H04W24/00 , H04W52/12 , H04W52/143 , H04W52/42 , H04W52/58 , H04W74/02 , H04W88/08
摘要： A base station (10) performs bidirectional radio communication with a terminal station apparatus by using a time division communication frame consisting of a first region having a predetermined open loop cycle and a second region having an open loop cycle shorter than the first region. A level detection block (21) detects a reception level of an uplink slot arranged in the second region. A transmission diversity block (14) diversity-transmits a downlink transmission signal allocated to a downlink slot corresponding to the aforementioned uplink slot in accordance with the detection result of the reception level. Thus, it is possible to enhance the improvement effect of the reception quality by the transmission diversity without lowering the transmission efficiency.
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公开(公告)号：EP1450506A4
公开(公告)日：2006-08-16
申请号：EP02803923
申请日：2002-11-25
发明人： SUDO HIROAKI
IPC分类号： H04B1/707 , H04J11/00 , H04J13/16 , H04L5/02 , H04L7/00 , H04L27/26 , H04Q11/04 , H04W28/18 , H04W52/34 , H04W72/04
CPC分类号： H04L5/0044 , H04B1/7083 , H04J11/003 , H04J13/0003 , H04L5/0021 , H04L5/006
摘要： The degree of multiplexing of a code division multiplexed signal transmitted by subcarriers is selected on a subcarrier-by-subcarrier basis. As a result, inter-code interference on the propagation path and degradation on the propagation path are lower for a code division multiplexed signal allocated to subcarriers with a low degree of signal multiplexing (G1) than for transmit signals allocated to subcarriers with a high degree of multiplexing. By this means, it is possible to prevent degradation of the error rate characteristics of important information without lowering spectral efficiency significantly as compared with the case in which the degree of signal multiplexing is decided uniformly for all subcarriers, and to achieve compatibility between spectral efficiency and error rate characteristics.
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公开(公告)号：EP1126647A4
公开(公告)日：2006-08-02
申请号：EP00953543
申请日：2000-08-22
发明人： SUDO HIROAKI
CPC分类号： H04L5/0044 , H04B7/0602 , H04B7/061 , H04B7/082 , H04L1/0001 , H04L1/004 , H04L1/1867 , H04L5/0023 , H04L5/0058
摘要： An OFDM communication device includes carrier selecting means for selecting a carrier to be transmitted for each branch according to the number of re-sendings of a transmission signal and transmitting means for subjecting the transmission signal superposed on the carrier to an IFFT processing for each branch and transmitting the transmission signal.
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公开(公告)号：EP1569362A4
公开(公告)日：2005-12-28
申请号：EP03775882
申请日：2003-11-26
发明人： SUDO HIROAKI
CPC分类号： H04B7/0871 , H04B7/0413
摘要： A receiving section (102) performs a wireless receiving processing over a signal that is received through a receiving antenna (101), and output thereof to a propagation path compensation section (103) and an interference compensation section (104). The propagation path compensation section (103) conducts a propagation path compensation for the received signal, based on the result of the propagation path estimation. The interference compensation section (104) performs a propagation path estimation, and output this results to a controller section (105), and also performs a MIMO separation processing and output the separated received signals to a selecting section (106). The selecting section (106) selects one of the signals output from the propagation path compensation section (103) and the interference compensation section (104) under the control of the controller section (105) and output thereof. The controller section (105) controls the selecting section (106), based on the result of the propagation path estimation. A demodulating section (107) and a decoding section (108) performs a demodulating and decoding of the received signals. Having this configuration, in MIMO communication, an error rate characteristic in the receiving side can be improved even under the environment, in which an interference compensation error becomes larger.
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公开(公告)号：EP1043858A4
公开(公告)日：2004-09-22
申请号：EP99954417
申请日：1999-11-08
发明人： SUDO HIROAKI , SHIRASAKI YOSHIMASA
CPC分类号： H04L27/2602 , H04L27/2604
摘要： In a modulation method in which a sender device expresses a symbol such as an 8PSK or a 16PSK by using three or more bits, important information is arranged at least at only one of the first and second bits, a receiver device extracts the important information from at least one of the first and second bits of the received signal, and thereby communication control is carried out based on the important information.
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