摘要
针对国标2.45GHz射频识别空中接口协议,提出了一种易于工程实现的OQPSK/DBPSK调制解调系统。该解调系统检测相位差,对扩频序列进行非相干差分解调,且对载波频偏不敏感,不需要载波环路,并行计算量小。仿真了在加性高斯白噪声下的比特误码率,当比特能量与噪声功率谱密度之比E_B/N_O不小于5dB时,两者的比特误码率均低于千分之一。
An OQPSK/DBPSK modulation and demodulation system easy to implement project was presented for the national standard 2.45 GHz radio frequency identification（RFID）air interface protocol.The phase difference was detected and the spread spectrum sequences were demodulated by the non-coherent differential demodulation method in the demodulation system.The proposed algorithm was insensitive to carrier frequency offset,and the carrier loop and a large quantity of parallel computing weren＇t needed.The bit error rate（BER）under additive white Gaussian noise was simulated.When the ratio of bit energy to noise power spectral density（EB/NO）wasn＇t less than 5dB,both of the BER were less than one thousandth.
出处
《微电子学》
CAS
CSCD
北大核心
2016年第4期530-532,536,共4页
Microelectronics
关键词
OQPSK调制
DBPSK调制
射频识别
非相干差分解调
扩展频谱
OQPSK modulation
DBPSK modulation
Radio frequency identification
Non-coherent differential demodulation
Spread spectrum
