Multiuser DSSS-OFDM multiband for ultra wideband communications

申请公布号：US7333528(B1)

申请号：US20030643302

申请日期：2003.08.19

申请公布日期：2008.02.19

申请人：

MIAO GEORGE J

发明人：MIAO GEORGE J.

分类号：H04B1/69

主分类号：H04B1/69

摘要：A multiuser direct sequence spread spectrum (DSSS) Orthogonal Frequency Division Multiplexing (OFDM) multiband of Ultra Wideband (UWB) communication system for short-distance wireless broadband communications is disclosed for indoor environment operations. Eleven frequency bands are employed, with each of the frequency bands having 650 MHz bandwidths. A 1024-point IFFT and FFT with 1,000 subcarriers are used to carry data and pilots within each of the frequency bands. The multiuser DSSS-OFDM multiband of the UWB communication system can transmit N different users at the same time by using a unique spreading sequence for each of the N different users. A QPSK modulation is used for a different data rate with scalability. The maximum transmitting data rate of the UWB communication system can achieve about 5.541 Gbps.

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