QPSK has advantages of having double data rate compare to BPSK. This is due to support of two bits per carrier in QPSK compare to one bit per carrier in the case of BPSK. Figure-2 mention difference between power spectral density of BPSK and QPSK modulated spectrum. To take advantage of ...
Offset QPSK, π/4-QPSK, and minimum shift keying are modulation schemes that mitigate the effects of high-slope symbol-to-symbol voltage changes. Differential QPSK uses the phase difference between adjacent symbols to avoid problems associated with a lack of phase ...
The advantage of coherent detection over differential detection for both BPSK and QPSK in a multipath radio channel with either frequency-fiat or frequency-selective fading is evaluated. The difference in receiver sensitivity is compared based on three criteria: (1) bit-error rate (BER) averaged ...
Bit-error RateFading ChannelPhase ErrorWireless CommunicationsIn this paper we consider coherent detection of binary and quaternary phase shift keying (BPSK and QPSK) signals in h-m fading channel. The h-m distribution is used to describe small variations of the signal, affected by a fading, in...
MPSK信号的盲信噪比估计算法 ME算法的MPSK信号盲信噪比估计算法,推导了每符号采样点数和分段数之间的关系.分别对BPSK,QPSK和8PSK信号进行了计算机仿真,并与常规SSME算法进行了比较.结果表明当... 隋丹,葛临东 - 《信号处理》 被引量: 0发表: 2007年
Simultaneous QPSK-to-2×BPSK wavelength and modulation format conversion in PPLN 来自 掌桥科研 喜欢 0 阅读量: 37 作者:FD Ros,K Dalgaard,Y Fukuchi,X Jing,C Peucheret 摘要: at 10 Gbaud.关键词: lithium compounds optical harmonic generation optical waveguides quadrature phase shift keying LiNbO3dif...
bwt this costas loop seems horrible to control compared to my previous work on qpsk/qam which was predictable. in this loop even if reverse the sense of error I get same result. so surely this is not how it should be done. If you make research and find out I will be interested to...
(it is composed of one polarization beam splitter, a polarization combiner, and two QPSK modulators) to realize single sideband modulation with tunable OCSR [11]. In 2017, Beilei Wu et al placed a dual parallel Mach-Zehnder modulator into the Sagnac loop, and two optical signals can be ...
This page on BPSK vs QPSK describes difference between BPSK and QPSK modulation techniques.It mentions link to basics of BPSK and QPSK along with difference between various terminologies. These are digital modulation techniques where in data input is digital (i.e. in binary form) and output is ...
Based on the analysis of the connectivity difference of the graphs under different hypotheses, the sum of degree (SD) of the graphs is utilized as a discriminate feature to classify BPSK and QPSK signals. Moreover, we prove that the SD is a Schur-concave function with...