无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2012年
1期
21-23
,共3页
信噪比估计%中频%扩频信号%时频结合
信譟比估計%中頻%擴頻信號%時頻結閤
신조비고계%중빈%확빈신호%시빈결합
SNR estimation%intermediate frequency%spread spectrum signal%time-frequency combination
对经典扩频信号信噪比（SNR）估计算法进行分析,提出了一种新的适用于扩频通信系统中频扩频信号信噪比估计算法。该算法在时域估计信号总功率,频域估计噪声功率,时频结合估计出中频扩频信号SNR。在加性高斯白噪声（AWGN）信道下,Matlab仿真结果表明该算法估计精度高,估计范围广及估计下限低。
對經典擴頻信號信譟比（SNR）估計算法進行分析,提齣瞭一種新的適用于擴頻通信繫統中頻擴頻信號信譟比估計算法。該算法在時域估計信號總功率,頻域估計譟聲功率,時頻結閤估計齣中頻擴頻信號SNR。在加性高斯白譟聲（AWGN）信道下,Matlab倣真結果錶明該算法估計精度高,估計範圍廣及估計下限低。
대경전확빈신호신조비（SNR）고계산법진행분석,제출료일충신적괄용우확빈통신계통중빈확빈신호신조비고계산법。해산법재시역고계신호총공솔,빈역고계조성공솔,시빈결합고계출중빈확빈신호SNR。재가성고사백조성（AWGN）신도하,Matlab방진결과표명해산법고계정도고,고계범위엄급고계하한저。
The paper analyzes the classical SNR estimation algorithm of spread spectrum signal, presents a new SNR estimation algorithm for the spread spectrum communication system before despreading and demodulation. The algorithm estimates the total signal power in time domain and noise power in frequency domain, and estimates SNR of intermediate frequency spread spectrum signal by time-frequency combination. In additive white Gaussian noise （AWGN） channel, the results of Matlab simulation show that the algorithm has such characteristics as high precision, wide range and lower limit.
