AN9820.1 - Intersil Corporation

AN9820.1 A Condensed Review of Spread Spectrum Techniques for ISM Band Systems

ee www.DataSheet4U.com TM A Condensed Review of Spread Spectrum Techniques for ISM Band Systems Application Note May 2000 AN9820.1 [ /Title in data transmission rate when compared with that for DQPSK, (AN98 Introduction and radios utilizing the MBOK modulation format have now The approval by the IEEE of the 20) achieved FCC certification. This applicatio.

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programmable data rate capability with high rates of 11, 5.5 and 4Mbit/s and IEEE Standard 802.11 fallback rates of 2 and 1Mbit/s. By definition the 1Mbit/s and 2Mbit/s data rates utilize DPSK modulation. The 4Mbit/s data rate mode also utilizes DPSK modulation at double the clock rate of the 2Mbit/s mode. For the higher data rates of 5.5Mbit/s and 11Mbit/s, the radio of Figure 2 utilizes MBOK modulation. MBOK modulation will be discussed following a review of some general topics in spread spectrum techniques. Since spread spectrum is a very broad topic, (no pun intended) the following discuss.