Bit-Error-Rate Performance Analysis of an Overlap-based CSS System

In a chirp spread spectrum (CSS) system, the overlap technique is used for increasing bit rate. More overlaps can offer higher data throughput; however, they may cause more intersymbol interference (ISI) at the same time, resulting in serious bit error rate (BER) performance degradation. In this paper, we perform the BER analysis and derive a closed form BER expression for the overlap-based CSS system. The derived BER expression includes the number of overlaps as a parameter, and thus, would be very useful in determining the number of overlaps for a specified BER. The numerical results demonstrate that the BER derived in a closed form closely agrees with the simulated BER.

Authors:

• Taeung Yoon
• Dahae Chong
• Sangho Ahn
• Seokho Yoon

Keywords:

• CSS
• DM
• chirp
• overlap.

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