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专利名称：Spread spectrum communications system发明人：TOSHIFUMI SATO申请号：AU7408796申请日：19961129公开号：AU712195B2公开日：19991028
摘要：In a data transmission system, transmission data (Td-I, Td-Q) is modulatedbased on pi /4-shift QPSK modulation (102) according to two spreading code sequences(SC-I, SC-Q) which is generated according to a chip timing signal (CLK1) in each symbolinterval. At a receiving side, the received spread spectrum signal (Rx-I, Rx-Q) isdemodulated based on the same pi /4-shift QPSK modulation (403) according to therespective replicas (SC-Ir, SC-Qr) of the spreading code sequences.
申请人：NEC CORPORATION
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