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专利名称：Bi-directional communication channel发明人：Zion Hadad申请号：US10921916申请日：20040820
公开号：US20050025042A1公开日：20050203
专利附图：
摘要：A communication system using OFDM transmission from a base station tosubscriber units, includes means for achieving a bi-directional channel. These meanscomprise transmitting means in the subscriber units for the transmission of signalsynchronous with the guard time interval in the OFDM transmission, and receiving means
in the base station for the reception of the transmitted signals. The system also includessignal shaping means in the receiver of the base station and/or the subscriber unit for theapplication of a window in time to signals received therein. A communication systemincludes a combination of CDMA modulation codes and OFDM coding/decoding means toachieve orthogonality between signals from the various users in the uplink. Acommunication system includes a combination of OFDM and channeling means forachieving orthogonality between signals from the various users in the uplink. AutomaticFrequency Control is achieved with means in the mobile unit for achieving a frequency-lock to the base station.
申请人：Zion Hadad
地址：Rishon Lezion IL
国籍：IL
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