专利名称：Spread spectrum communications system
with transmitted reference
发明人：Ross, John Anderson Fergus,Hershey, John
Erik,Ali, Irfan,Hladik, Stephen
Michael,Saulnier, Gary Jude,Weir, MichaelPaul
申请号：EP97304904.2申请日：19970704公开号：EP0817396B1公开日：20040602
摘要：A low complexity and low cost transmitted reference spread spectrumcommunications system provides several methods of generating a suitable widebandcarrier, a method for combining the wideband carrier with a narrowband modulatedwideband carrier, and a number of implementations of a simple, inexpensive receiver forthe transmitted reference communications system. The transmitter includes a balancedmodulator for modulating a wideband spreading signal with a narrowband messagesignal to generate a wideband carrier. A signal combiner combines the wideband carrierwith a narrowband modulated wideband carrier to generate a transmitted referencespread spectrum signal. The receiver includes a selectable time delay device (21) having aplurality of taps for receiving a detected received signal from the transmitter. A tapselector (22) selects a delayed signal from the selectable time delay device. A mixer (23)combines output signals of the selectable time delay device and the tap selector, and aleaky integrator (24) receives the mixer output signal and controls the tap selector. The
leaky detector generates the narrowband message signal.
申请人：GEN ELECTRIC
地址：US
国籍：US
代理机构：Goode, Ian Roy
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