The implementation of a Base station Transceiver for WLL system based on wideband CDMA

The implementation of a BTS(Base station Transceiver) for WLL system using wideband CDMA(W-CDMA) method is presented in this paper. It consists of three boards; receiver, transmitter, RF controller. Some RF parameters are considered and simulated by the RF simulation S/W using commercial and customized component specifications. The implemented transceiver of 5MHz RF channel bandwidth satisfies the system requirements of a transceiver such as dynamic range, sensitivity in the receiver, and spurious emission suppression in the transmitter. At the receiver, the experimental measurement showed 2.86dB of NF and 60dB above of dynamic range in AGC locking. At the transmitter, the -49.34dBc of spurious emission suppression is attained when the output power of the transmitter is 34.3dBm. These results are good enough to meet standard performance specifications.