Title :
Realization ofUNB System Based on FIR Filter
Author :
Bin, Li ; Weixia, Zou ; Zheng, Zhou ; Qijun, Song
Author_Institution :
MOE Wireless Network Lab., Key Lab. of Universal Wireless Commun., Beijing
Abstract :
Ultra-narrow-band communications system can greatly improve the spectrum utilization efficiency, therefore it will ease the tension of spectrum. Unfortunately, arguments from academia still focus on its principle as well as the realization. UNB transmission system based on the FIR filter has been explored in this paper. The characteristic of UNB signal after the FIR filter was analyzed. Then information recovery has been performed using maximum likelihood receiver. The rationality of using the energy of continuous spectral side-lobe has also been discussed. As simulation has showed, if the bandwidth of RF filter is equal to the signal´s NYQUIST´S bandwidth, the BER performance of UNB transmission system is only 1dB poorer than BPSK when BER dropped to 10-5, while the spectrum utilization efficiency can exceed 100bits/s/Hz.
Keywords :
FIR filters; radio receivers; radiofrequency filters; BPSK; FIR filter; Nyquist´s bandwidth; RF filter; UNB system; continuous spectral side lobe; maximum likelihood receiver; spectrum utilization efficiency; ultranarrowband communications system; Bandwidth; Baseband; Bit error rate; Delay; Finite impulse response filter; Modulation coding; RF signals; Radio frequency; Signal analysis; Wireless communication; FIR; ML demodulation; NYQUIST´S bandwidth; UNB; asymmetric; high spectrum utilization efficiency;
Conference_Titel :
Communications and Information Technologies, 2008. ISCIT 2008. International Symposium on
Conference_Location :
Lao
Print_ISBN :
978-1-4244-2335-4
Electronic_ISBN :
978-1-4244-2336-1
DOI :
10.1109/ISCIT.2008.4700180
