发明名称 |
Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum |
摘要 |
A method for allowing a number of wireless transceivers to exchange information (data, voice or video) with each other. A first frame of information is multiplexed over a number of wideband frequency bands at a first transceiver, and the information transmitted to a second transceiver. The information is received and processed at the second transceiver. The information is differentially encoded using phase shift keying. In addition, after a pre-selected time interval, the first transceiver may transmit again. During the preselected time interval, the second transceiver may exchange information with another transceiver in a time duplex fashion. The processing of the signal at the second transceiver may include estimating the phase differential of the transmitted signal and pre-distorting the transmitted signal. A transceiver includes an encoder for encoding information, a wideband frequency division multiplexer for multiplexing the information onto wideband frequency voice channels, and a local oscillator for upconverting the multiplexed information. The apparatus may include a processor for applying a Fourier transform to the multiplexed information to bring the information into the time domain for transmission.
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申请公布号 |
US5282222(A) |
申请公布日期 |
1994.01.25 |
申请号 |
US19920861725 |
申请日期 |
1992.03.31 |
申请人 |
FATTOUCHE, MICHEL;ZAGLOUL, HATIM |
发明人 |
FATTOUCHE, MICHEL;ZAGLOUL, HATIM |
分类号 |
H04B1/707;H04J13/00;H04J13/02;H04L5/02;H04L25/03;H04L27/26;(IPC1-7):H04K1/00 |
主分类号 |
H04B1/707 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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