fig.3 Power spectral density ofBPSK vs QPSK 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 ...
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 ...
BPSK transfers one bit per symbol, which is what we’re accustomed to so far. Everything we’ve discussed with regard to digital modulation has assumed that the carrier signal is modified according to whether a digital voltage is logic low or logic high, and...
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...
QPSK and BPSK demodulator chip-set for satellite applications A QPSK/BPSK demodulator chip-set for DBS applications is presented. The concept and algorithm choices made during the design resulted in a chip-set with ve... RVD Wal,L Montreuil - 《IEEE Transactions on Consumer Electronics》 被引量...
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...
目录PI/2 BPSK调制 BPSK调制映射原理 PI/2 BPSK调制映射原理 QPSK调制映射原理 参考文献 PI/2 BPSK调制 BPSK调制映射原理 BPSK(二进制相移键控),相移键控是利用载波的相位变化来传递数字信息,而振幅和频率保持不变。在3GPP 38.211.5.1节中,调制映射器将二进制数字0或者1作为输入,并产生复制调制符号作为输出。
Therefore, monobit receivers for BPSK have been proposed to address this problem. In this work, QPSK modulation is considered for higher data rate. First, the optimal receiver based on monobit ADC with Nyquist sampling is derived, and its corresponding performance in the form of deflection ratio...
1QPSK扩频调制正交性分析QPSK扩频调制的作用是将扩频后的I和Q两支路基带信号分别对同相和正交的射频载波进行BPSK调制。2路BPSK调制信号合路生成QPSK调制信号[6],其原理框图如图1所示。为了保证系统的抗干扰能力,同时防止I和Q量,并为接收端分析误码性能提供评判依据[2,3]。传统测量QPSK调制信号载波正交性的方法是...
So far we have considered the bit error rate (BER) of BPSK and QPSK in an AWGN channel. Now we turn our attention to a Rayleigh fading channel which is a more realistic representation of a wireless communication channel. We consider a single tap Rayleigh fading channel which is good ...