Analysis on detection performance of an energy detector for several chip waveforms in a DS/SS communication

In this paper, we analyze the effect of chip waveform on the detection performance of an energy detector in a multi-user DS/SS system. Detection performance of the partial-band detection is investigated together with the full-band detection for a DS/SS signal. In order to evaluate the detection performance of the partial-band detection, bandwidth factor and energy factor are introduced. Numerical results show that the partial-band detection strategy always produces better detection performance than the full-band detection strategy with a proper selection of partial-band detection bandwidth. In addition, among the compared three chip waveforms, such as rectangular, half-sine and raised-cosine waveform, the raised-cosine waveform; produces much lower detection probability compared with other waveforms, as the number of concurrent users increases.