| 摘要 |
PURPOSE: A performance analysis method of a CSS system based on diversity combining techniques over multipath channels is provided to compare BER performance of DM-BPSK(Binary Phase Shift Keying) system of MRC, EGC(Equal Gain Combining) or SC(Selection Combining) base and analyzing BER performance of EGC and SC diversity combining technique. CONSTITUTION: A CSS(Chirp Spread Spectrum) system executes modeling of a first received signal of a rake receiver(S100). The CSS system uses a MRC(Maximal Ratio Combining) technique and a SC(Selection Combining) technique(S300) on a second received signal and a presumed channel coefficient. The CSS system calculates SINR(Signal-to-Interference plus Noise Ratio) using a generated decision variable(S400). Based on one among plural diversity combining techniques, the CSS system calculates BER(Bit Error Rate) of multipath channel(S500). [Reference numerals] (AA) Start; (BB) End; (S100) Modeling a first receiving signal, which is received in a rake receiver through a multi-path channel, in a CSS system; (S200) Generating a second receiving signal by correlation function operation of a first receiving signal and a chirp signal; (S300) Generating a determination variable for a transmission signal by applying the second receiving signal and an estimated channel coefficient to a diversity combining technique; (S400) Calculating an average SINR per channel using the determination variable; (S500) Calculating the BER of the multi-path channel based on the diversity combining technique
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