Systems and methods are described for hybrid spread spectrum radio systems. A method, includes receiving a hybrid spread spectrum signal including: fast frequency hopping demodulating and direct sequence demodulating a direct sequence spread spectrum signal, wherein multiple frequency hops occur within a single data-bit time and each bit is represented by chip transmissions at multiple frequencies.

 
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> METHOD AND APPARATUS FOR PROCESSING RADIO SIGNALS TO IDENTIFY AN ACTIVE SYSTEM IN A COEXISTING RADIO NETWORK

> Receiver device suited to a transmission system using a direct sequence spread spectrum

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