Toward Wireless Receivers without Crystals Invited Paper
2005
In new low cost, IOW, bit rate wireless protocols such as ZigbeeTM and BIuetoothTM, there is significant economic motivation to implement transceivers with a completely integrated alternative to quartz crystals. In this paper, we explore a differential detection based method of recovering a direct sequence spread spectrum signal with a receiver that does not have a crystal reference. Despite the additional frequency offset and phase introduced by using an integrated crystaIless reference oscillator, we find that such a receiver is feasible and can perform sufficiently for many applications. Indcr Terms - crystai-less communicstion, differential detection, phase noise.
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