Adaptive acquisition of PN sequences for DSSS communications |
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Authors: | Chang-Joo Kim Hyuck-Jae Lee Hwang-Soo Lee |
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Affiliation: | Electron. & Telecommun. Res. Inst., Taejon ; |
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Abstract: | Since the received signal levels in mobile communications are unknown and the location is varying, acquisition schemes for pseudonoise (PN) sequences with fixed thresholds cannot provide satisfactory performance. This fixed-threshold scheme may cause too many false alarms or result in a low detection probability for a selected threshold value. We present an adaptive acquisition scheme for PN sequences which estimate the background power level, multiply it with a threshold coefficient to keep the false alarms constant, and use it as a threshold |
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