Reduction technique for spread spectrum clock interference with wireless system

Abstract

The spread spectrum clock (SSC) is known to have the ability to reduce the quasi-peak level of clock harmonics noise. However, SSC may also have an adverse effect on wireless systems. In the present paper, a SSC with optimized parameters is developed that has a beneficial effect on one-segment broadcasting, which is based on orthogonal frequency division multiplexing and is used for mobile TV in some countries. The modulation frequency and the modulation deviation of SSC are controlled to move the clock harmonics noise power outside the one-segment signal band. The simulation results reveal that the bit error rate with SSC can be decreased to less than one-tenth of that without SSC.