Algorithm for the Implementation of Network Interface Unit Transmitter in Broadband Wireless Local Loop

광대역 무선 가입자망(B-WLL)에서 가입자용 송신기 구현 알고리즘

In this paper we proposed the algorithm for the implementation of network interface unit transmitter and analyzed its performance in broadband wireless local loop. The symbol rate of upstream transmitter is variable since the channel bandwidth of upstream can vary. Assuming that master clock ( $f_{DAC}$) is fixed, the cubic interpolator of Farrow structure is used to increase the sample rate to master clock rate. Simulation shows that the signal to noise ratio is about 54~55 dB and spurious signal power of upstream transmitter is less than 45 dB.B.