专利名称：Spread spectrum modulator发明人：Nara, Yoshikazu申请号：EP97108015.5申请日：19970516公开号：EP0808032A3公开日：20030115
摘要：A system and method is disclosed for producing a band-limited modulatedinformation signal. A modulating signal generator is disclosed which provides a band-limited modulating signal having a predetermined bandwidth and cutoff characteristic. Amodulator system and method is disclosed for producing a band-limited modulatedinformation signal by combining an information signal with the band-limited modulatingsignal. A modulating signal generator and method is disclosed which generates a band-limited modulating signal as a series of modulating signal values at periodic intervals. Afurther modulating signal generator is disclosed which provides a band-limitedmodulating signal by generating frequencies and combining them at appropriateamplitudes and phases to synthesize a band-limited modulating signal. A further
modulating signal generator is disclosed for generating a band-limited modulating signalby generating a time domain signal having a predetermined frequency spectrum andsequentially outputting a digital representation of that time domain signal.
申请人：MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
地址：1006, Oaza Kadoma Kadoma-shi, Osaka 571-0050 JP
国籍：JP
代理机构：Kügele, Bernhard
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