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In this thesis I design a wireless modem with 64Kbps data rate. Using this modem, I measured the bit error rate (BER), frame error rate (FER) and the receiving power strength in different environments. Based on the measured data, I have a chance to check some communication theories as well as understand the characteristics of wireless channels. This wireless modem employs the direct sequence spread spectrum (DSSS) technique. The PN code I use is the extended balanced Gold code with length 32. The modem contains two parts. One is the baseband subsystem, which is composed of a spread spectrum transceiver (SST) IC (AIC9001) and a microprocessor (89C51). The other is the ARF9003 RF module. Our measurement environments include laboratories, hallway, corner, mountain-top basketball-court, office, factory and an apartment. I hope that the data I obtained in the experiments can help people understand the statistic characteristics of wireless channels.
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