Processing Gain for DSSS

Processing Gain for DSSSTM

Processing Gain for Direct Sequence Spread Spectrum Communication Systems and PRISM
Application Note August 1996 AN9633
Authors: John Fakatselis

Introduction [ /Title (AN96 33) /Subject (Processing Gain for Description Direct In a DSSS system random binary data with a bit rate of rb Sequen bits per sec (bps) is multiplied (Exclusive Ored) by a pseudorandom binary waveform, which is at much higher ce Spread rate and it provides the frequency spreading operation. This Spec- pseudorandom (PN) binary source outputs symbols called chips at a constant chip rate rC chips per sec (cps). This is a trum random, noise like signal and hence the name PN signal. Com- The chip rate is always higher than the bit rate, and the ratio muni- of the chip rate to the bit rate is dened as the processing cat